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
Boss couplings supply a convenient threaded fitting to connect two lengths of hose or a single length to a male or female threaded outlet
Recommended for steam service up to 450 deg F
Polymer seat
Safety Notes: Worn-out hose couplings can be dangerous.
They should be checked regularly and replace when necessary.
Each coupling user should review applications and add safety devices where indicated.
Pressurized steam is an extremely dangerous commodity.
Only hose, fittings, clamps and accessory items that have been approved for steam service should ever be used!
Never use an unapproved item for steam service.
Always follow the manufacturer's product recommendations for pressurized steam handling.
Applications: Boss couplings are all-purpose hose couplings, universally recommended for steam hose connections, they are also widely used for air, water, fluid petroleum, chemicals and liquid petroleum gas up to 1 in ID