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 6650-00-950-4107
NSN 5950-01-525-4377
NSN 6135-01-432-1334
NSN 6685-00-097-6263
NSN 5999-00-846-0009
NSN 5990-00-679-5286
NSN 5855-00-951-6483
NSN 5975-01-351-6097
NSN 5990-00-958-8344
NSN 6610-01-487-6843
NSN 6145-00-024-6683
NSN 6620-00-278-7313