All gear measuring wires meet or exceed Fed. Spec. B89 for Grade AM.G.W. Long Form certification traceable to N.I.S.T. is available, please call us at 1-800-825-4272 and we will gladly prepare a quote. Metric Module Sets also available on request.
Our Handbook is the number one resource for everything you need to know about Thread Measuring Wires and is a great reference guide for any shop or laboratory. Tables, specifications and examples of gears including external gear, internal gear with varying pressure angles are referenced in the Handbook.