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 5990-00-242-3754
NSN 6685-01-254-3014
NSN 5998-01-504-6248
NSN 5950-01-226-4232
NSN 6685-00-902-6773
NSN 6650-00-299-9681
NSN 4140-00-259-2567
NSN 5950-01-282-6030
NSN 4140-00-881-3418
NSN 5935-01-089-7920
NSN 2925-00-989-0523
NSN 5935-00-202-5808