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 6645-01-324-1956
NSN 5975-01-155-3270
NSN 6610-01-350-7697
NSN 5910-01-355-2149
NSN 5895-00-421-1951
NSN 5920-00-071-9241
NSN 5990-01-492-1114
NSN 6105-01-015-0827
NSN 5985-01-352-0428
NSN 6130-01-514-7059
NSN 6220-01-412-3206
NSN 7035-01-227-2546