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 2925-01-359-4027
NSN 6610-00-826-7235
NSN 5935-01-506-6723
NSN 5960-00-269-4762
NSN 6105-00-012-8278
NSN 6685-01-377-8150
NSN 2925-01-422-1542
NSN 6130-01-601-6188
NSN 6240-00-275-1950
NSN 6645-00-650-3405
NSN 4140-01-591-0616
NSN 6150-00-407-2118