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 6645-00-940-0774
NSN 6105-01-251-8278
NSN 5996-01-343-0154
NSN 5985-01-017-7342
NSN 6645-01-633-1852
NSN 6150-01-521-7227
NSN 6130-01-529-0650
NSN 6320-01-173-7950
NSN 5855-00-089-3974
NSN 6240-01-550-1178
NSN 5895-00-723-7258
NSN 6610-01-320-5074