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 6650-01-395-4096
NSN 6145-01-268-3073
NSN 6645-01-103-8449
NSN 5930-01-118-4861
NSN 5855-01-067-8841
NSN 6105-01-464-0245
NSN 6685-01-530-9269
NSN 5975-01-577-7396
NSN 4140-00-402-8291
NSN 5935-01-207-9120
NSN 4140-01-514-7549
NSN 6610-01-633-8931