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 5855-00-973-5717
NSN 5920-01-449-1321
NSN 4140-01-051-4428
NSN 5935-00-455-1766
NSN 5945-01-579-4072
NSN 5975-00-862-2495
NSN 6645-00-248-4925
NSN 6105-01-455-6201
NSN 6135-00-840-6451
NSN 6240-01-624-1777
NSN 5945-01-507-4789
NSN 5975-01-500-1307