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 5920-00-902-2377
NSN 6130-00-554-7852
NSN 5960-00-275-7497
NSN 6240-01-633-9357
NSN 5930-01-111-9763
NSN 6135-00-295-0608
NSN 5920-01-121-1213
NSN 6105-01-427-2336
NSN 5930-00-246-5046
NSN 6650-01-014-7671
NSN 4140-01-334-4113
NSN 5998-00-288-5533