... " 3.Blind, Weld Neck,Slip On,Threaded 4.Socket Welding,Lap Joint stainless steel duct flange 1. Standard:(forged flange): ANSI ... 2. Type: Blind, Weld Neck, Slip On, Threaded, Socket Welding,Lap Joint 3. Size: 1/2" - 120"4. Material: F304 F304L ...