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 5998-01-426-7035
NSN 5990-01-124-9063
NSN 5975-00-260-1336
NSN 6135-00-933-4293
NSN 5920-00-499-8285
NSN 5920-01-423-8595
NSN 6135-01-116-3385
NSN 6645-01-463-3024
NSN 5930-00-269-4996
NSN 6645-00-239-5743
NSN 5950-00-645-3966
NSN 5996-01-480-4559