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 5835-01-589-4735
NSN 6220-01-071-2100
NSN 6240-01-285-7857
NSN 5999-01-267-2646
NSN 5920-01-411-5423
NSN 5960-00-906-6087
NSN 2925-01-312-9502
NSN 5910-01-116-3554
NSN 6650-01-309-9152
NSN 5990-00-510-2098
NSN 5975-00-890-0129
NSN 6105-01-433-2204