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 5910-01-304-5783
NSN 2925-01-379-6183
NSN 5910-01-058-7769
NSN 5950-01-487-3750
NSN 5975-01-543-0305
NSN 5950-01-095-6503
NSN 6220-00-876-8325
NSN 6650-00-751-9958
NSN 6150-01-067-9145
NSN 6320-00-194-4252
NSN 7035-00-916-9380
NSN 5975-00-658-3718