K&B black iron rings are used widely in joining ductwork or round metal containers together in applications varying for HVAC, to dust/fume control, to tank. Most sizes are in stock for immediate shipment. Through 14" diameter, angle rings are press formed, and above 14", roll formed and welded. They are available with or without holes. Bolts not included. Larger angle rings, channels, and bars are available and rolled to order in steel, aluminum, stainless and other alloys. All angle rings and flanges are punched on automatic equipment. Note: Gaskets are in stock for KB duct rings in sizes 3" through 50". They are 1/8" thick black neoprene and punched to K&B specifications. Other gasket materials are available as a special order.
Oval, square and rectangular flanges are also available. Special angle rings and gaskets available.
