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 5920-01-279-0419
NSN 5835-01-595-4099
NSN 6610-00-308-2502
NSN 5965-00-913-9545
NSN 6685-00-232-3239
NSN 6135-01-349-6285
NSN 5996-01-349-9234
NSN 5910-00-351-2944
NSN 5905-01-631-4752
NSN 5975-00-871-3582
NSN 6110-01-346-1964
NSN 5925-01-227-2798