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 6650-01-023-7002
NSN 5915-01-304-2087
NSN 6620-01-168-8450
NSN 2925-01-085-0691
NSN 6130-01-499-7305
NSN 6645-00-589-0143
NSN 6220-01-138-1622
NSN 5935-01-171-7483
NSN 5895-01-631-0467
NSN 5965-01-065-5544
NSN 6145-01-596-7542
NSN 6645-01-468-4990