- The spud part of the coupling serves as one half of the connection and is usually fixed to the equipment. The stem part that is clamped to the hose is the other half. The two halves are connected or disconnected by rotating the wing nut onto the spud. When connected they achieve a mechanical, as well as, a pressure seal.
- Boss couplings supply a convenient threaded fitting to connect two lengths of hose, or a single length to a male or female threaded (NPT) outlet.
- stem: ¼" – 1" plated steel, 1¼" – 4" plated iron, 6" tubular steel
- spud: ¼" – 1" plated steel, 1¼" – 6" plated iron