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 5935-00-374-7584
NSN 5960-00-840-5465
NSN 5975-01-445-7365
NSN 5905-01-596-5847
NSN 6650-00-193-7358
NSN 5965-00-193-2406
NSN 5920-00-394-9529
NSN 5855-01-228-0942
NSN 5930-01-652-1186
NSN 6145-01-018-4894
NSN 5960-01-604-1158
NSN 5910-01-512-8782