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 5915-00-602-0002
NSN 6645-01-476-8013
NSN 5990-01-442-3520
NSN 6645-00-152-1702
NSN 5935-01-117-8879
NSN 6110-01-359-9376
NSN 6145-01-581-6020
NSN 6150-01-123-1089
NSN 6320-01-536-3077
NSN 5935-01-123-6561
NSN 6105-00-905-8403
NSN 5910-01-606-8817