ASME B1.20.7 Hose Coupling Threads: NH fire hose (Appendix A)

All 10 thread sizes per ASME B1.20.7. Click any row for full specifications, tolerances, and geometry.

DesignationDiameter (in)TPISpecs
0.75"1.3878 TPI
1"1.3878 TPI
1.5"2.0029 TPI
2.5"3.08367.5 TPI
3"3.63896 TPI
3.5"4.26396 TPI
4"5.03594 TPI
4.5"5.78594 TPI
5"6.2854 TPI
6"7.054 TPI

Showing 10 thread sizes • Standards: ASME B1.20.7