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 5975-01-345-7226
NSN 6145-01-154-7183
NSN 5930-01-131-6869
NSN 6130-01-577-5042
NSN 5998-01-308-4197
NSN 6240-01-149-8156
NSN 6645-01-228-8128
NSN 6105-00-325-3637
NSN 5945-00-494-6567
NSN 6620-01-259-2411
NSN 6320-01-512-2031
NSN 5915-01-013-6277