NPSF & NPSM Pipe Thread Gages

Product Details

NPSF (Dryseal) straight pipe working gages are used to check size of the straight internal threads intended for assembly with NPTF external threads. A GO and NO GO gage are used to insure the threaded part is within acceptable tolerance.
NPSM straight thread gages are designed for free fitting mechanical joints. Straight thread pipe plug gages require both a Go and NO GO gage and are made to 2B tolerances. The same process is used as working NC or NF gages.

ANSI/ASME B1.20 specifications
Members class 2B
Handles sold separately