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 6645-01-322-8431
NSN 6610-00-614-7943
NSN 5935-00-206-6105
NSN 5999-01-600-7650
NSN 5965-01-379-7706
NSN 6320-01-452-2394
NSN 6645-01-228-8380
NSN 6240-01-153-2861
NSN 6645-01-468-3397
NSN 4140-00-152-1584
NSN 5930-00-910-8111
NSN 5975-00-814-6844