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 5960-01-386-5770
NSN 5965-01-155-0811
NSN 6145-01-326-6223
NSN 6240-01-227-4178
NSN 5945-01-546-2188
NSN 6220-00-578-6539
NSN 6320-00-925-0558
NSN 6220-01-171-0957
NSN 4140-01-558-6831
NSN 5835-01-093-8244
NSN 5835-01-474-1224
NSN 7035-00-631-3782