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Test Fixture Manufacturers

Last updated: January 2026

This directory lists 69 test fixture manufacturers across the United States, from dedicated In-Circuit Test (ICT) fixture houses to full-service functional test system integrators.

Buyers in this category are typically solving critical validation challenges, ensuring product quality and functionality before market release. They rely on these fixtures for precise test point access, robust signal integrity, and consistent mechanical interfacing with their Device Under Test (DUT). Key problems include achieving high fault coverage, minimizing false positives/negatives, and handling high-density designs or complex RF measurements.

Supplier types range significantly, from specialized shops focusing solely on In-Circuit Test (ICT) fixtures (often with dedicated expertise in specific platforms like Teradyne or Agilent) to full-spectrum system integrators. The latter can design and build entire Functional Test Fixtures (FTF), including custom electronics, software, and mechanical actuation, often incorporating vacuum fixtures for consistent DUT contact. Understanding this distinction is crucial for matching supplier capabilities to project scope.

When approaching test fixture manufacturers, buyers should come prepared with comprehensive documentation: full CAD models of the DUT, Gerber files, schematics, Bill of Materials (BOM), and a detailed Test Requirements Document (TRD). Suppliers, in turn, expect clarity on test points, desired fault coverage, throughput requirements, and any specific environmental or interface constraints. Providing a known-good unit (KGU) or a 'golden sample' is also invaluable for validation.

A notable trend in this category is the increasing demand for fixtures capable of supporting higher frequencies and faster data rates, driven by advancements in wireless and high-speed digital electronics. This pushes manufacturers to focus more on impedance control, material selection for signal paths, and advanced shielding within the fixture itself, moving beyond simple 'bed of nails' designs towards more sophisticated receive block architectures and custom probe solutions.

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Company Directory

69 companies nationwide

Hayward, CA

Based in Hayward, CA, 44Tesla is a full-service contract manufacturer specializing in New Product Introduction (NPI) for complex electronic products. They provide comprehensive services including PCBA and box build, functional testing, and in-house test fixture development. The company supports clients from prototyping through full production runs.

Hampshire, IL

American Precision Assemblers, Inc., located in Hampshire, IL, provides custom cable assemblies, wire harnesses, and electronic sub-assemblies. They offer electronic box build services and testing fixture solutions, particularly for the automotive industry. The company is certified to ISO 9001:2015 and AS9100D standards.

Milford, CT

Based in Milford, CT, ASR Engineering specializes in designing and manufacturing aerospace and defense test fixtures. They provide solutions for military-grade and aerospace components requiring extreme environmental testing, offering engineering design, manufacturing support, and product testing validation services.

Novi, MI

Based in Novi, MI, Cav Tool Company engineers and develops custom fixtures to meet diverse manufacturing needs. The company specializes in producing high-quality, close-tolerance precision tools and components, leveraging a state-of-the-art facility. Cav Tool offers competitive pricing and quick turn-around times for its custom manufacturing solutions.

San Marcos, CA

Based in San Marcos, CA, Cedarware offers end-to-end product design, embedded systems, and manufacturing solutions. They provide in-house small volume production and develop test fixtures and manufacturing tooling. ISO 13485 certified, Cedarware specializes in compliant medical devices and automated commercial manufacturing for domestic clients.

Maple Grove, MN

Based in Maple Grove, MN, Circuit Check manufactures automated test systems, In-Circuit Test fixtures, and Functional Test fixtures. They provide integrated test solutions, utilizing extensive in-house drilling, machining, assembly, and verification capabilities for automotive, military & aerospace, medical, and computer networking industries.

Clark Fixtures engineers, designs, and manufactures innovative tooling and fixtures, providing a one-stop solution for customers' quality control requirements. Their advanced solutions enhance manufacturing processes by verifying and controlling critical part areas, including automated robotic cell fixtures. They focus on delivering high-quality tooling that is accurate and user-friendly.

Westlake Village, CA

Based in Westlake Village, CA, Coastal RF Systems specializes in custom RF shielding products and precision CNC machining services. The company designs and manufactures custom RF enclosures, antenna test fixtures, and performs sheet metal fabrication for various industrial sectors, including aerospace, defense, and telecom.

Corona, CA

Based in Corona, CA, Cortek Test Solutions manufactures accurate, repeatable, and reliable test fixtures and safety enclosures for the electronics industry. They offer customized functional test fixtures designed using 3D modeling software. With over 30 years of experience, all products are proudly 100% American Made.

Mountain View, CA

Based in Mountain View, CA, Crystal Instruments offers custom test fixture design and manufacturing through its CI Testing Labs. They provide comprehensive contract vibration and acoustic testing solutions, specializing in tailored fixtures for various applications. Their advanced lab facilities support clients' specific testing requirements.

Electro-Photonics LLC specializes in designing and manufacturing test fixtures for a wide range of RF and Microwave components. They possess extensive experience with both passive and active components, providing customized fixture solutions. The company supports manufacturers seeking precise and reliable test solutions for their advanced electronic devices.

Cerritos, CA

Fledge Machine Shop Inc., based in Cerritos, CA, offers precision CNC machining services including milling and turning. They fabricate custom parts from diverse metals, plastics, and composites. Serving industrial, aerospace, and manufacturing sectors, their reliable capabilities are well-suited for producing custom test fixtures.

Based in Warminster, PA, Flexible Test manufactures precision-engineered automated test fixtures for electronics. They specialize in durable, high-cycle solutions for Flat Flex and ZIF connectors, ensuring consistent, repeatable results. The company offers standard and custom fixtures, providing seamless integration and reliable performance for efficient production.

Mount Laurel, NJ

Based in Mount Laurel, NJ, InTest EMS designs and manufactures mechanical and electrical systems for automated semiconductor test cells. They provide manipulators, docking systems, and specialized test interfaces. These interfaces electrically connect testers to probers or final test handlers, improving ATE utilization and efficiency for semiconductor testing applications.

Elk Grove Village, IL

Intrinsic Quality, based in Elk Grove Village, IL, specializes in designing and building custom, dedicated test solutions. They provide expert solutions for various testing requirements, including Function Test and Robotics. Their capabilities encompass a diverse range of electronic testing needs for industrial and commercial clients.

Mchenry, IL

Joule Technologies, based in McHenry, IL, specializes in manufacturing In-Circuit Test (ICT) and Functional Test (FCT) fixtures. They offer turnkey solutions for all ATE platforms, including vacuum boxes, overclamps, and pneumatic gates. Capabilities extend to 1mm probes and LED verification, aimed at enhancing manufacturing efficiency.

Greer, SC

Based in Greer, SC, KTM Solutions, Inc. offers specialty mechanical engineering services, providing custom design solutions for manufacturing projects. They build turnkey fixture, jig, and tooling manufacturing systems to facilitate reliable and safe product manufacturing.

Princeton, IN

Based in Princeton, IN, LeakMaster is a US manufacturer of advanced air leak detection equipment and comprehensive leak testing products. They provide custom leak testing solutions, including complex seal tooling and automated leak test machines. LeakMaster offers tailored instruments and systems for diverse industrial applications, particularly within the automotive sector.

Northridge, CA

Based in Northridge, CA, Maroney Company, LLC is a precision machining company specializing in fixture design, tooling design, and electrical discharge machining. They provide comprehensive manufacturing solutions for complex projects, maintaining AS9100 and ISO 9001 certifications. Services cover concept to completion for industrial clients.

West Bend, WI

Based in West Bend, WI, MD Design & Automation is a jig and fixture manufacturer. They specialize in designing and producing high-quality fixtures, robotics, gages, prototypes, and special tooling. As a precision machining and job shop, they provide CNC, EDM, and CMM inspection services.

Anaheim, CA

Based in Anaheim, CA, Mechanized Enterprises Inc. provides specialized engineering and manufacturing services for industrial applications. They focus on custom machinery, tooling, and precision fabrication, including the design and production of test fixtures and automated systems for diverse client needs.

Minneapolis, MN

Micro Control Company, based in Minneapolis, MN, specializes in advanced burn-in with test systems for engineering characterization, life testing, and production applications. They design and manufacture flexible burn-in boards, which function as test fixtures, featuring high-speed clocks, individual current monitoring, and tight-pitch sockets for various logic and memory devices.

Wheeling, IL

Based in Wheeling, IL, Material Testing Technology (MTT) manufactures custom material testing fixtures for a variety of materials. They produce fixtures, adapters, and accessories to client specifications and industry standards, meeting precise dimensional tolerances, hardness, and surface finishes. Common items are often in stock.

North Mankato, MN

Based in North Mankato, MN, NextGen RF Design, Inc. specializes in RF/Wireless Functional Test Fixtures, including custom bed-of-nails designs, for demanding applications. They also develop comprehensive test equipment and calibration standards. The company applies its proven RF expertise across defense, industrial, IoT, medical, and public safety sectors.

Based in Kutztown, PA, Omnitech Automation, Inc. designs and builds comprehensive testing solutions and turn-key automated manufacturing equipment. They create custom work cells and large-scale assembly systems with robotics, vision, and complex motion. Specializing in precision craftsmanship since 1965, the company serves various industries.

Rio Vista, CA

Based in Rio Vista, CA, PCB Fixtures specializes in design and fabrication services for precision motion control and automation solutions. They provide complete electrical control systems, PCB designs, and fixturing for various applications. The company also integrates machine vision and develops software for automation components.

Milpitas, CA

PCB Trace Technologies Inc. offers comprehensive test engineering services, including test strategy development, test fixture design and fabrication, and test software development. Based in Milpitas, CA, the company also provides high-quality PCB layout, fabrication, and assembly services, serving as a one-stop solution for electronic product development and quality assurance.

Holland, MI

Based in Holland, MI, Quality Machine & Automation designs, builds, and integrates custom automation equipment. They specialize in secondary processes and test machines, including leak-test machines and poke yoke fixtures, along with robotic weld fixtures. They provide solutions for various test specifications.

Sterling Heights, MI

Based in Sterling Heights, MI, Rayco Fixture manufactures CMM fixtures, modular fixture systems, fixture plates, and fixture kits. The company provides flexible, reusable fixture components, primarily serving the automotive industry. Its products are made in the USA.

RNS USA develops and manufactures functional test fixtures for the Automated Test Equipment (ATE) market. With over 30 years of experience, the company provides reliable, customizable fixtures for diverse applications. They also offer complete test systems, including rack systems and programming, for turn-key solutions.

Anaheim, CA

Based in Anaheim, CA, Superior Jig, Inc. specializes in high-precision machining and toolmaking. Their skilled machinists utilize a variety of precision machine tools to hold tight tolerances, working with demanding materials. They deliver custom solutions with meticulous accuracy for various designs.

Aurora, CO

Summit Interconnect is a North American manufacturer of advanced printed circuit boards. They specialize in high-density rigid, RF/microwave, rigid-flex, and flexible PCBs. Their capabilities include manufacturing critical components for testing, such as semiconductor reference cards, probe cards, DUT, and burn-in-boards, along with prototype assembly.

Milpitas, CA

SJC Precision, Inc., based in Milpitas, CA, is an ISO 9001-2015 certified manufacturer operating since 1996. They specialize in high-precision jigs, fixtures, tools, dies, and CNC machining, achieving accuracies of +/-0.0001 inches. The company provides design support and rigorous quality inspections for custom industrial components.

Tempe, AZ

Based in Tempe, AZ, Team Pipeline specializes in test fixture design, machine design, custom equipment design, and industrial automation. They develop custom manufacturing equipment and turnkey test fixtures to characterize, inspect, assemble, manufacture, and perform verification testing on devices for various industries.

Test Head Engineering, LLC. specializes in custom test fixtures, offering in-house design, fabrication, and assembly from concept to delivery. They provide creative, cost-effective solutions for capturing and interfacing with loaded circuit boards, supporting both bottom-access and top-access testing. Designers collaborate directly with test engineers.

Grand Rapids, MI

Based in Grand Rapids, MI, Tooling Systems Group manufactures innovative, turnkey tooling solutions, including check fixtures, for automotive, appliance, agriculture, and aerospace industries. The company provides comprehensive manufacturing services, specializing in advanced tooling systems and integrated solutions for complex industrial demands.

WaveTherm Corporation provides thermo-mechanical products and design solutions for embedded technologies and high-performance electronic systems. They specialize in thermal management, electronic packaging, and custom heatsink design, including thermal testing fixtures. WaveTherm offers expertise for rugged and Mil-spec computing applications.

San Diego, CA

Based in San Diego, CA, Wyoming Test Fixtures manufactures standard and custom test fixtures, leveraging over 30 years of industry experience. They keep many standard fixtures in stock for prompt shipment and offer expert consultation on test fixture usage and method development.

Semco Machine Corporation designs and manufactures custom test fixtures, emphasizing performance, precision, and repeatability. They provide functional test fixture solutions, including ATE and PCB test fixtures. Their offerings feature clamshell mechanical fixtures, CAM/GATE and CAM/TRAC test kits, universal, and vacuum test kits.

Electromechanica, Inc., based in Mattapoisett, MA, designs and manufactures specialized test systems, functional test fixtures, and interface test adapters. They provide high voltage and high power Automated Test Equipment (ATE) for diverse sectors including mass transit, medical, scientific, and renewable energy. Offers comprehensive engineering.

Lincoln, AR

Based in Lincoln, AR, EMS, Inc. provides custom test fixture design and manufacturing for PCB prototype to final assembly checks. With over 19 years of experience, the company also offers comprehensive PCB design, assembly, cable and wire harness, and electro-mechanical assembly services.

Fremont, CA

Based in Fremont, CA, Essai provides custom engineered test and handling solutions for the semiconductor and electronics industries. They offer board test fixtures, test handlers, wafer probers, and contactors. Essai conducts in-house design, engineering, machining, assembly, and testing from their US facility.

Testek Solutions designs, manufactures, and supports highly reliable test equipment and testing facilities. With over 55 years of experience, the company serves the aerospace and defense industries, providing specialized solutions for critical testing requirements.

Greenville, MI

Based in Greenville, MI, Aggressive Tooling, Inc. manufactures custom test fixtures and tooling solutions. They specialize in leak test fixtures designed to verify metallic parts and assemblies meet specifications for gas leakage through flanged and welded joints. The company also provides final assembly gauges, manual weld fixtures, and robotic fixtures.

Rochester Hills, MI

Cincinnati Test Systems designs and manufactures custom functional test systems and integrated leak test solutions. Based in Rochester Hills, MI, they combine proprietary instrumentation with custom fixturing and automation to deliver production-ready systems. They serve diverse industries globally, providing expertise for OEMs and component suppliers.

Fort Worth, TX

Concentric Technology Solutions (CTS), based in Fort Worth, TX, designs and manufactures custom test fixtures and jigs for wireless device and power device testing. They provide innovative test equipment, including compact OTA chambers and shield boxes, tailored for 5G, mmWave, V2X, and UAV applications.

Anaheim, CA

Based in Anaheim, CA, Fixture Design & Manufacturing Co specializes in custom engineering and fabrication of industrial fixtures. They offer comprehensive services from design to production, catering to diverse manufacturing needs, including precision test fixtures and assembly tools for commercial clients.

Warren, RI

Based in Warren, RI, H+W Test Products manufactures test fixture products for automated test systems (ATE). Specializing in in-circuit, functional, and combinational testers, the company provides essential components for industrial users. Their fixtures support precise testing processes for various applications.

Shelby Twp, MI

iDEAL Technology Corporation, based in Shelby Twp, MI, manufactures precision tooling and a range of check fixtures, including SPC, holding, CMM, cooling, and welding types. They also offer custom automated assembly equipment, CNC machining, and rapid prototyping for automotive and aerospace industries.

Cranbury, NJ

Based in Cranbury, NJ, JAKTOOL LLC offers turnkey engineering solutions, advanced product development, and contract manufacturing. They specialize in precision prototyping, testing, and validation, including advanced rocket thrust fixtures for aerospace. Serving military, medical, and space exploration, JAKTOOL provides high-quality solutions.

Germantown, WI

Based in Germantown, WI, Mahuta Tool Corp. specializes in custom fixture design and manufacturing, including jigs, fixtures, and gauges. An ISO 9001:2015 certified CNC machine shop, they provide comprehensive tooling solutions, prototyping, and assembly for aerospace, military, medical, and energy industries.

MTS Systems manufactures a complete selection of high-quality test fixtures. Offerings include bend, shear, fatigue fixtures, and compression platens, engineered for rigorous material testing. The company serves diverse industrial applications, providing specialized solutions for analyzing metals, composites, plastics, and wire.

Champlain, NY

Based in Champlain, NY, Rematek Test Fixtures specializes in manufacturing advanced in-circuit and functional test fixtures for the electronic test industry. They produce high-quality, innovative test solutions compatible with major testers such as Agilent, Genrad, and Teradyne, providing reliable custom fixtures.

Simplexity Product Development provides custom test fixtures for product development, manufacturing quality control, and real-time audits. As an ISO 13485:2016 certified engineering partner, they offer mechanical, electrical, control systems, and software engineering for diverse products including medical devices and robotics.

Plymouth, MI

Based in Plymouth, MI, Troy Design & Manufacturing Co. provides checking fixtures, CMM holding fixtures, scanning fixtures, and verification tooling. As an end-to-end engineering and prototyping partner, they also offer metal fabrication, tool & die manufacturing, and precision machining services.

AGICORP offers comprehensive Test Fixture solutions, ranging from simple manual jigs to complex automated Test Fixtures. The company specializes in custom Electrical Test Fixture manufacturing, providing tailored solutions for various testing needs. AGICORP designs and builds fixtures for diverse industrial applications.

AMETEK Sensors, Test & Calibration manufactures and supplies materials testing machines and force measurement instruments, including specialized test fixtures. They provide universal testing machines, tensile testers, digital force gauges, torque gauges, and grips. Serving industries like medical devices, plastics, packaging, and metals with comprehensive test solutions.

Fremont, CA

Arcadia Test, Inc. is a Fremont, California-based manufacturer specializing in the design and build of sophisticated functional and in-circuit test fixtures. They provide complete turnkey test solutions, including RF test fixtures and system integration, serving automotive, medical, industrial, consumer electronics, and defense sectors.

Semco Machine Corp. manufactures mechanical test fixtures, specializing in cost-effective 'Clamshell' type solutions for the Automatic Test Equipment (ATE) industry. The company also provides various testing solutions, including contact adapter and patchcord solutions, plus cable assemblies for PXI switches and microwave relays.

Tempe, AZ

Benchmark Electronics provides comprehensive product lifecycle solutions, encompassing design engineering, advanced manufacturing, and aftermarket services. Their test development team specializes in implementing manual and automated test systems and delivering robust testing solutions for various industries.

ESC, Inc. specializes in fabricating custom cabinets, chassis, and control panels. These components are designed for test equipment, test stands, and diverse control applications, manufactured precisely to client specifications. Their offerings directly support the construction of comprehensive test fixtures.

Forwessun designs, manufactures, and supplies high-quality ICT (In-Circuit Test) Fixtures. These specialized test fixtures are tailored for various test platforms. The company offers its manufacturing services to industrial and commercial customers across the United States and Canada.

Long Beach, CA

Based in Long Beach, CA, J F Fixtures & Designs is a contract manufacturer specializing in precision machining and custom parts. They design and build various test fixtures, assembly fixtures, tools, and gages. The company serves the aerospace, medical, automotive, and commercial industries with robust fabrication capabilities.

Santa Rosa, CA

Keysight Technologies provides advanced electronic design and test solutions. They manufacture specialized test fixtures, such as the AE6941A Automotive Ethernet Test Fixture, designed for easy access to signals. These fixtures are crucial for conformance testing and accurate device characterization in the automotive industry.

Anaheim, CA

Based in Anaheim, CA, Precision Machining & Fabrication specializes in custom CNC machining and precision fabrication services. The company engineers and manufactures tooling, jigs, and fixtures tailored to exact specifications. They support prototyping and production for diverse industries including medical, aerospace, and automotive applications.

Eddy, TX

Based in Eddy, TX, Superior Welding & Fabrication, LLC manufactures specialized billet 6061 aluminum test fixtures, featuring proprietary diffusers for even gas distribution in back purging applications. They also provide weld test coupons, aluminum chill blocks, and other welding accessories for commercial and industrial clients.

TEK Industries specializes in designing and building custom test fixtures to meet specific client specifications. The company focuses on creating durable and reusable test fixtures for industrial applications. They provide comprehensive manufacturing services, from initial design to final construction of custom test solutions.

Test Electronics designs and manufactures a diverse range of test fixtures for circuit board applications, including burn-in and timed testing. Their products feature 6-sided Bed of Nails, automated double-sided systems, and various clamshell fixtures, supporting quick development, heavy board testing, production, and R&D environments.

Huntington Beach, CA

Based in Huntington Beach, CA, Vinatronic specializes in the design and manufacturing of custom test fixtures. They produce a range of products including ICT, functional, and RF test fixtures, alongside test jigs, probes, and pins. Vinatronic provides essential tools for product testing and quality assurance across various industries.

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How to Choose a Company

  • Validate the supplier's expertise with your specific test methodology. If you require a complex Functional Test Fixture (FTF) with integrated electronics and software, ensure they have in-house electrical and software engineering, not just mechanical build capabilities.
  • Assess their experience with the specific test platform (e.g., Keysight 3070, Teradyne Spectrum, or custom PXI/LXI systems) you intend to use. An intimate understanding of the ATE interface and programming environment significantly reduces integration headaches.
  • For high-reliability or regulated industries like aerospace or medical, demand evidence of certifications like AS9100 or ISO 13485, and inquire about their processes for material traceability and revision control. ITAR compliance is non-negotiable for defense applications.
  • Critically evaluate their DFM (Design for Manufacturability/Test) capabilities. A red flag is a supplier who accepts your design without challenging potential issues like insufficient test point access, unsuitable pad sizes for pogo pins, or mechanical interference, which often leads to costly redesigns later.
  • Investigate their pogo pin sourcing and quality control. Inferior or mismatched pogo pins are a common gotcha, leading to inconsistent contact, high resistance, and ultimately, false failures or damage to the Device Under Test (DUT). Ask about their preferred pin vendors and qualification process.

Frequently Asked Questions

What's the key difference between an In-Circuit Test (ICT) fixture and a Functional Test Fixture (FTF)?

An ICT fixture, often a 'bed of nails' design, primarily verifies the integrity of individual components and connections on a PCB, checking for shorts, opens, and component values. A Functional Test Fixture (FTF), conversely, simulates the operating environment of the Device Under Test (DUT) to verify its overall performance and adherence to specifications, often involving power-up, software loading, and complex signal generation/measurement. While ICT checks 'how it's built,' FTF checks 'if it works.'

How important is it for a test fixture manufacturer to have in-house electrical design capabilities?

For simple In-Circuit Test (ICT) fixtures, basic electrical wiring skills might suffice. However, for complex Functional Test Fixtures (FTF), especially those requiring custom instrumentation, signal conditioning, or integrated control circuitry, in-house electrical design is paramount. It ensures optimal signal integrity, proper impedance matching for high-frequency signals, and seamless integration with Automated Test Equipment (ATE), preventing costly issues from being discovered during the final integration phase.

What specific documentation should I prepare when requesting a quote for a new test fixture?

Beyond standard CAD files (Gerber for PCB, 3D models for mechanical parts), provide a comprehensive Bill of Materials (BOM), schematics, a detailed Test Requirements Document (TRD) outlining what needs to be tested and pass/fail criteria, and any specific interface or connector requirements. Crucially, specify your Automated Test Equipment (ATE) platform and any existing test code or drivers. A known-good unit (KGU) or 'golden sample' is also highly beneficial for setup and validation.

My product requires high-frequency signal integrity. What should I look for in a fixture supplier?

For high-frequency applications, look for a supplier with proven experience in RF and high-speed digital fixture design. They should demonstrate expertise in material selection (low-loss substrates), impedance-controlled pogo pin paths, proper shielding and grounding techniques, and potentially custom coaxial probe solutions. Ask about their ability to perform S-parameter measurements or use simulation tools to validate signal integrity within the fixture design before fabrication.

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