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 6320-00-164-4087
NSN 5920-01-259-8529
NSN 5990-00-917-4220
NSN 5990-01-645-2592
NSN 5975-01-439-7203
NSN 2925-01-175-1217
NSN 5998-01-396-7901
NSN 5998-01-526-3336
NSN 2925-01-551-5375
NSN 5905-01-283-7084
NSN 5855-01-108-2044
NSN 6130-01-094-9827