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 5975-01-427-3521
NSN 5895-00-831-4452
NSN 6685-01-142-9276
NSN 6645-00-850-6486
NSN 5950-00-258-4445
NSN 6610-01-492-0605
NSN 6105-00-291-0154
NSN 6220-01-269-0465
NSN 4140-00-546-3554
NSN 5975-01-152-3320
NSN 5920-01-290-3771
NSN 5920-01-050-7474