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 7035-00-117-0418
NSN 5985-00-734-7479
NSN 5905-00-107-6236
NSN 5985-01-241-8742
NSN 5925-00-952-4545
NSN 6650-00-140-8776
NSN 6105-01-048-6370
NSN 5998-01-351-4351
NSN 5950-00-356-2688
NSN 6240-00-889-1825
NSN 5910-01-258-4887
NSN 5915-00-372-4522