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 4140-01-268-2429
NSN 6110-01-123-5125
NSN 5925-01-206-5484
NSN 5985-00-263-7870
NSN 5835-00-306-5240
NSN 4140-00-886-1710
NSN 6150-00-093-5783
NSN 5895-01-024-0528
NSN 6135-01-315-9214
NSN 5905-01-525-5138
NSN 6240-01-510-3050
NSN 5950-01-205-6968