Stainless Steel 2 1/2" Camlock Male x 2 1/2" NPT Male (USA) Female Size_5 Inch while the other knob is

while the other knob is spring loaded

Compatible part number - DMH3025

Equivalent part number - HA2515

hose coupling or an adapter check the female coupling for stamped numbers and letters

Aluminum Female to Female Adapter

Stainless Steel 2 1/2" Camlock Male x 2 1/2" NPT Male (USA) Female Size_5 Inch while the other knob isType "F" stainless steel 2 1 2 inch male camlock (Cam & Groove) coupler to 2 1 2 inch male NPT threads. Designed to interchange with all products produced to MIL C 27487F. Pressure rating for adapters, is based on the seal of the mating part. Under no circumstances should cam and groove couplings be used for compressed air or steam service! Connections The male side of this adapter will only connect to 2 1 2 inch female camlock The male threaded side