The spud part of the coupling serves as one half of the Boss ground joint 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 on the spud, when connected they achieve both a mechanical, and a pressure seal
Positive metal-to-polymer seal
Leak-proof seal forms when the metal head of the stem makes contact with the patented polymer seat in the Boss™ ground joint spud
The non-metallic polymer seat resists most chemicals found in manufacturing facilities
Easy-to-seal
Polymer seat
Recommended for steam service up to 450 deg F
Boss couplings supply a convenient threaded fitting to connect two lengths of hose or a single length to a male or female threaded outlet