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 6130-01-172-5870
NSN 5905-00-253-4247
NSN 5930-00-501-3928
NSN 6650-01-371-9133
NSN 5935-01-116-4631
NSN 6320-00-578-6898
NSN 5945-01-115-9737
NSN 5935-01-203-1174
NSN 6110-01-334-7617
NSN 5945-01-254-3773
NSN 2925-01-465-2901
NSN 5910-01-519-3043