Used to check internal threads of nuts, tapped holes, and precision fittings for correct size and pitch.

Key Features:

• GO/NO-GO design for tolerance verification

• Constructed from hardened and stabilized tool steel

• Lapped surface finish for repeatable readings

• Available for Metric, BSP, Unified, and NPT threads

• Compliant with ISO, BS & ANSI standards

Quality & Performance:

• Pitch accuracy within ±2 µm

• Certified by NABL-traceable calibration labs

• Optional tungsten carbide coating for extra wear resistance

Applications:

• Aerospace and valve manufacturing

• Automotive assembly and jigs

• Precision engineering inspection

Benefits:Prevents thread mismatch, ensures tight fit, and extends tool life.