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 6650-00-923-4192
NSN 6610-00-421-9853
NSN 6645-01-605-1485
NSN 2925-01-442-4171
NSN 6685-01-629-6663
NSN 5999-01-468-6805
NSN 6105-01-616-4504
NSN 6620-00-371-7109
NSN 6220-01-030-2697
NSN 6135-00-826-4798
NSN 6320-00-925-0558
NSN 6220-01-497-5694