Specialty & Custom Thread Gages
For over 70 years, Gage Assembly has been a leading manufacturer of top-quality gages. We serve applications across a broad range of demanding industries, including aerospace, automotive, oil and gas, energy, and defense. With an unwavering commitment to quality and integrity, we pride ourselves on helping our customers safeguard threaded components.
Gage Assembly’s Specialty Thread Gages
Gage Assembly manufactures high-quality gages with accuracy and precision. Our skilled team utilizes cutting-edge technology to create custom solutions to meet the specific demands of an application, often with short lead times. Our skilled fabrication capabilities include state-of-the-art manufacturing equipment, such as Computer Numerical Control (CNC) machinery and internal/external high-precision thread grinding machines.
At Gage Assembly, we manufacture our custom thread gages according to the following ANSI thread series designations:
- ACME
- Aeronautical National Pipe Taper (ANPT)
- British Standard Whitworth (BSW)
- Buttress
- Deutsches Institut fĂĽr Normung (DIN)
- Japanese Industrial Standards (JIS)
- Metric
- National Hose (NH)
- National Pipe Straight Mechanical (NPSM)
- National Pipe Thread (NPT)
- Unified Miniature Screw (UNM)
- Unified (UN)
- Unified Special (UNS)
Our ability to engineer each solution to fit a specific process and application results in better-quality products and a more accurate functional thread check of threaded components, making it easier to determine if the threaded component of the part is in or out of tolerance.
Custom and Special Thread Gage Applications
Gage Assembly can provide various types of ring thread gages and fixed limit plugs, and can use customer-supplied prints and drawings to create tailor-made gages. This includes building thread gages with special thread dimensions, including modified leads, angles, pitch diameters, and other unique requirements.

Some common applications that rely on us to provide top-quality custom thread gages include:
- Automotive. Thread gages ensure parts conform to industry-approved specifications, which is essential in component and engine assembly in the automotive industry.
- Aerospace. Thread gages are crucial in aerospace applications, where precision is paramount for safety-critical components.
- Construction. In construction applications, thread gages verify threaded holes and fasteners are compatible. They are also used to ensure threading is correct in pipe and fitting installations.
- Manufacturing. Thread gages play a key role in quality control, setup, and tooling verification. Manufacturers often utilize thread gages for maintenance and repair purposes, assessing worn threads and making critical decisions regarding replacement parts.
- Medical. Accurate thread measurement is vital in the manufacturing of medical devices. Any deviation in thread dimensions, no matter how small, can impact the effectiveness of parts.
Precisely Manufactured Special Gages From Gage Assembly
Since 1953, Gage Assembly has been providing customers with competitively priced gages made from high-quality tool steels, coupled with precision lapping techniques and thread grinders to achieve an exceptional finish that measures on the high side of tolerances. We utilize state-of-the-art CNC machinery and advanced software to develop high-quality thread rings, gages, and plugs with extremely accurate dimensions. We can deliver gages with capabilities running between 000-120 threads per inch to 15 ½ inch diameter and one thread per inch.
Contact us today to request a catalog and speak with one of our skilled technicians to learn more about Gage Assembly’s comprehensive line of high-quality products.