Pipe Thread Gaging · ISO/IEC 17025 · Made in USA
Pipe Thread Gages
GO/NOGO Plug and Ring Gages for Tapered and Straight Pipe Threads
NPT, NPTF, ANPT, and straight pipe thread plug and ring gages — manufactured to ANSI/ASME B1.20.1, B1.20.5, and SAE AS71051, and certified in our ISO environmentally controlled laboratory.
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Pipe thread gages verify the taper, size, and hand-tight engagement of threaded pipe, fittings, and couplings so sealed joints assemble correctly every time. WESTport manufactures the full range of pipe thread gaging in-house and certifies every gage against NIST-traceable masters.
This collection covers the pipe thread families we stock and build to order:
- NPT taper pipe (L1) plug and ring gages for functional size and hand-tight engagement, per ANSI/ASME B1.20.1.
- NPTF (Dryseal) plug and ring gages — L1, L3, and 6-step crest/root checks — per ANSI/ASME B1.20.5.
- ANPT aeronautical taper pipe plug and ring gages per SAE AS71051, for sealed thread joints in aerospace components.
- Straight pipe (NPSC/NPSM) plug and ring gages for straight internal and external pipe threads.
GO and NO GO members, class X tolerance, each inspected in an environmentally controlled ISO/IEC 17025 accredited laboratory.