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 4140-01-439-5906
NSN 6320-00-149-7570
NSN 6105-01-063-4911
NSN 5855-01-397-2487
NSN 5945-01-651-5302
NSN 6610-01-633-8931
NSN 5915-00-754-4898
NSN 5935-00-941-6190
NSN 5945-00-046-4593
NSN 6650-00-562-0291
NSN 5935-01-399-0289
NSN 6135-01-633-8502