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 5935-01-425-7727
NSN 6135-01-388-2761
NSN 5915-00-261-5783
NSN 2925-01-509-3465
NSN 6150-00-522-4909
NSN 6610-01-120-7670
NSN 7035-01-271-1643
NSN 5905-00-275-0342
NSN 4140-01-469-6140
NSN 5945-01-411-1932
NSN 6240-00-281-8417
NSN 6320-01-498-4954