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.