Ground Joint female spud is included in the female hose coupling set. Purchase additional female spuds to convert additional equipment, pipe, and manifolds to ground joint wing nut thread. 

• Male wing nut thread to F NPT
• only use with ground joint female couplings (do not use if female swivel requires an external gasket)
• NPT size matches wing nut size (no jump sizes)

1-1/4" and larger sizes are plated iron, smaller sizes are plated steel

3/4" & 1" use the same wing nut thread, and 1-1/4 & 1-1/2" use the same wing nut thread