A soft metal or nonmetal sleeve, designed to mate with a pin-rivet. it may include an external wrenching facility which breaks off at a perdetermined torque to form a head.
NSN 5835-00-433-8540
NSN 5930-00-388-0161
NSN 6650-00-684-3060
NSN 5975-01-507-2219
NSN 6685-00-726-2055
NSN 5910-01-484-9726
NSN 6220-00-489-8571
NSN 5945-00-275-7927
NSN 5920-01-463-3156
NSN 5905-01-492-1106
NSN 2925-01-134-9175
NSN 5910-01-010-3356