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 2925-01-154-2949
NSN 5920-01-248-8386
NSN 5920-00-535-4468
NSN 2925-01-193-6689
NSN 5935-01-498-1571
NSN 7035-00-215-3272
NSN 5910-01-043-5778
NSN 5920-01-206-3977
NSN 6320-00-831-2227
NSN 5998-01-634-0066
NSN 5905-00-204-9861
NSN 6135-01-361-9297