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 6320-00-504-1214
NSN 5960-00-386-8215
NSN 5990-00-424-1598
NSN 6145-01-032-4557
NSN 6135-00-643-4843
NSN 5999-00-194-4112
NSN 5999-01-529-3769
NSN 5910-01-031-4855
NSN 5925-01-301-2920
NSN 6130-01-437-7099
NSN 6610-01-388-0563
NSN 6145-00-174-9344