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 5895-00-797-6011
NSN 6105-00-818-9695
NSN 6645-01-300-5054
NSN 5965-01-534-7152
NSN 5960-01-567-1096
NSN 5905-00-308-9901
NSN 6240-01-046-9424
NSN 5965-01-081-9543
NSN 6650-00-466-1697
NSN 6645-00-960-6594
NSN 5998-00-056-0919
NSN 4140-01-192-3570