The spud part of the coupling serves as one half of the Boss ground joint connection and is usually fixed to the equipmentThe 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 sealPositive metal-to-polymer sealCopper seatLeak-proof seal forms when the metal head of the stem makes contact with the patented polymer seat in the Boss™ ground joint spudThe non-metallic polymer seat resists most chemicals found in manufacturing facilitiesEasy-to-sealRecommended for steam service up to 450 deg FBoss couplings can be applied to many-types of rubber, synthetic, plastic, metallic or semi-metallic hoseSafety 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: For air, water, fluid petroleum, chemicals and liquid petroleum gas up to 1 in ID