5100-190C, USDA FOREST SERVICE STANDARD: THREADS, GASKETS, ROCKER LUGS, CONNECTIONS AND FITTINGS, FIRE HOSE (DEC-2005)

5100-190C, USDA FOREST SERVICE STANDARD: THREADS, GASKETS, ROCKER LUGS, CONNECTIONS AND FITTINGS, FIRE HOSE (DEC-2005)., This document establishes a standard for threads, gaskets, and rocker lugs for fire hose couplings, connections, and fittings used by the USDA Forest Service in wildland firefighting. Thread series designations described in this standard are 3/4 inch 11-1/2 NH, 1 inch 11-1/2 NPSH, 1-1/2 inch 9 NH, 1-1/2 inch 11-1/2 NPSH, 2 inch 11-1/2 NPSH, 2-1/2 inch 7- 1/2 NH, 2-1/2 inch 8 NPSH, and 4 inch 4 NH.