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 5905-01-227-0935
NSN 6320-01-373-9355
NSN 4140-01-150-9209
NSN 7035-01-008-7248
NSN 5999-01-048-4613
NSN 4140-01-592-9169
NSN 5985-01-593-6435
NSN 5855-01-286-2916
NSN 5915-00-958-2622
NSN 6145-01-323-6509
NSN 5965-00-246-5612
NSN 6645-01-279-2414