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 6645-01-013-3852
NSN 5905-00-064-6896
NSN 6220-00-417-3615
NSN 5945-01-464-8424
NSN 5855-01-433-3197
NSN 6110-00-910-6537
NSN 5999-01-471-2133
NSN 6110-01-182-0530
NSN 5930-01-408-5257
NSN 6650-01-560-0321
NSN 6685-01-281-8860
NSN 5855-01-492-5666