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 5910-01-098-2081
NSN 5975-01-627-5188
NSN 6650-01-267-4925
NSN 6150-01-550-0535
NSN 6105-00-343-1964
NSN 5930-01-174-7752
NSN 5920-01-535-6498
NSN 6320-01-448-1189
NSN 2925-01-443-4216
NSN 6110-01-037-4863
NSN 6135-00-284-1406
NSN 6240-01-322-9387