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 6130-01-352-5644
NSN 6620-01-431-9176
NSN 5999-01-382-8624
NSN 6135-01-387-0754
NSN 5925-00-855-7587
NSN 5985-01-327-8774
NSN 6110-01-632-1140
NSN 6105-00-014-5010
NSN 5935-00-807-8782
NSN 5895-00-702-4045
NSN 5999-01-081-6961
NSN 5990-00-432-0649