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Thread Check, Inc. is a full service gage company offering a complete line of precision thread plug and ring gages, plain cylindrical plug and ring gages, custom gauges, patented 3 wire thread measuring systems, API pipe gages, tri roll thread comparators, powerful thread engineering software, gear measuring wires and instruments, cutting tools, master discs, ISO 17025 Registered calibration services, and free technical support. Thread Check, Inc. offers a complete line of AGD - American Gage Design, unified and metric thread gages. Thread Check Inc. manufactures thread gages to ANSI/ASME and many international standards including ISO, DIN, BS, and API gages.

Thread Check, Inc. manufactures threaded and plain cylindrical plug gauges in chrome, tin coat, carbide, ceramic and other types of special materials. Thread Check manufactures many types of special gages including pre-plates, multiple starts, special leads, acme thread gages, API thread gages, buttress thread gages, spline gages, trapezoidal gages, flex hole location gages, British thread gauge, STI Helical Coil gages, square thread gages, extra length thread gages, and custom gauges to print. All Thread Check, Inc. gages are manufactured to the high end of the tolerance to ensure longer gauge life. All gages are traceable to the National Institute of Standards and Technology - NIST.

Thread Check Inc.'s customer service team is led by expertly trained sales engineers and supported by some of the industry's most talented manufacturing engineers and gauging experts. Our engineering staff will assist in the design and manufacturing of special gaging products from concept to completion. Thread Check Inc. offers express manufacturing and delivery services on many custom gauges at a premium charge.

At Thread Check, Inc. we are committed to ensuring that every gauge we manufacture is of the utmost precision and quality. Please browse through our website to find the special gauge or thread gauge that suits your needs. You may also download or request a copy of our comprehensive catalog, in which you’ll find detailed information about each and every thread gauge, special or custom gauge, and gauge verification system.

Quick Links: Snap gauges - AGD Limit Snap Gages - Mitutoyo Snap Meters - AGD Limit Snap Gages - Model C, 1/2"-3/4"

Air Gages
An air gage is an easy to use instrument that requires little or no training, and is designed to provide and accurate measurement of dimensions with very tight tolerances-typically 0.005 in. or smaller. Air gages work simply by inserting the gage into a hole or over a shaft diameter. A reading is given almost instantly. Air gages are reliable and cost-effective, and are often utilized as the primary method for obtaining precise measurements.
ANPT Ring Gages
Thread Check Inc. offers a complete range of Aeronautical National Form Taper Pipe Thread Ring Gages per SAE AS71051. ANPT thread ring gages are intended for use on pipe, plugs, fittings, and similar devices in aeronautical components and equipment requiring a sealed thread joint and where straight threads and gaskets or O-rings are inadequate.
BA Thread Ring Gages
The British Association standard thread form is recommended by the British Standards Institute for screws smaller than instead of BSW and BSF threads. BA threads are similar to Whitworth threads in terms of rounded crests and roots except that the symmetrical angles are 47 degrees and 30 minutes and the crest and root radiuses are proportionately larger.
BSF Thread Ring Gage
The British Standard Fine Screw thread is known as a parallel screw thread of Whitworth form having a 55 degree included angle. With the standardization of Unified threads, the BSF Whitworth thread form is typically being utilized for replacement parts. Steel bolts of inch and below should not be made to close class limits and instead should be specified to medium class and free class limits. Close class threads should be applied to screw threads requiring a tight fit.
BSPP Thread Ring Gages
Thread Check Inc. offers a complete line of British parallel pipe threads per ISO 228 and BS -2779. In March 2003 the British Standards Institute withdrew BS-2779 and replaced it with ISO-228. ISO 228 1 covers pipe threads where pressure-tight joints are not made on the threads. ISO 228 2 covers the limit gages for pipe threads where pressure-tight joints are not made on the threads. ISO 1179, pipe connection, threaded to ISO 228-1 and gauged with ISO 228 2 gauges for plain end steel and other metal tubes in industrial applications. BSPP Thread gages have a 55 degree thread profile.
BSW Thread Ring Gages
The British Standard Coarse Screw thread is known as a parallel screw thread of Whitworth form having a 55 degree included angle. With the standardization of Unified threads, the BSW Whitworth thread form is typically being utilized for replacement parts. Steel bolts of inch and below should not be made to close class limits and instead should be specified to medium class and free class limits. Close class threads should be applied to screw threads requiring a tight fit.
Feeler Gages
Feeler gages are a commonly used tool in inspection and engineering applications, designed to provide a precise measurement of the clearance or gap between two components or dimensions. Feeler gages are useful in many applications, and are typically comprised of a set flexible pieces of carbon steel, each with a specific thickness denoting a precise measurement, either in imperial units or metric. Using feeler gages ensures that components are spaced properly apart so as to function effectively.
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