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 4140-01-424-0611
NSN 5945-01-451-4305
NSN 6150-01-634-0575
NSN 5915-01-406-3271
NSN 5915-00-216-8185
NSN 5925-00-150-1072
NSN 6220-00-079-2943
NSN 5895-01-658-4004
NSN 2925-01-617-6302
NSN 5920-01-463-9238
NSN 6685-01-223-0745
NSN 6130-01-212-3331