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 6685-00-774-5106
NSN 6240-00-930-4206
NSN 6620-01-553-7917
NSN 5996-01-608-6025
NSN 6645-01-459-9586
NSN 5915-01-645-4809
NSN 6650-01-361-9336
NSN 6145-01-019-3479
NSN 7035-00-238-3662
NSN 5996-01-229-3676
NSN 5945-00-255-1148
NSN 5975-00-139-2194