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 5998-01-197-5795
NSN 6145-01-073-6641
NSN 6150-01-194-6518
NSN 5960-00-447-0689
NSN 2925-01-169-6196
NSN 6320-01-481-7322
NSN 6645-00-226-2270
NSN 5895-01-112-0532
NSN 5975-01-494-5256
NSN 5835-00-787-8122
NSN 6650-00-534-2323
NSN 6240-00-494-0927