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 4140-01-360-6744
NSN 5965-01-158-4187
NSN 5965-01-100-5283
NSN 5920-01-428-4412
NSN 6240-01-604-9172
NSN 6130-00-318-9246
NSN 5895-01-369-5448
NSN 6110-01-329-2564
NSN 4140-01-367-5824
NSN 5945-01-019-6373
NSN 5935-01-438-2894
NSN 6130-00-615-9250