M3162 Series clamp hose couplings, for use on LP-Gas or anhydrous ammonia (NH3), are designed to be compact yet rugged for long, dependable service. A small boss on the clamp portion of the coupling keeps the bolt from turning when installing, making installation much easier. Each ductile iron unit receives a coat of electro-deposition paint. Larger size clamp hose couplings can be furnished with a swivel nut female Acme outlet that reduces weight and space.