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 6320-00-284-1524
NSN 6685-00-583-2473
NSN 5935-01-468-4107
NSN 5905-01-535-0366
NSN 6220-01-373-4589
NSN 6645-01-613-2053
NSN 5990-00-288-1820
NSN 5950-00-706-7700
NSN 6110-00-257-1446
NSN 6130-00-939-2516
NSN 6685-00-242-2224
NSN 5895-01-340-5502