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 2925-01-595-4345
NSN 5920-01-519-3615
NSN 5985-00-948-7696
NSN 6145-01-568-9199
NSN 5999-01-062-2109
NSN 5975-01-023-8597
NSN 5965-01-391-1703
NSN 5910-01-361-6622
NSN 6620-00-202-5122
NSN 5905-01-449-5307
NSN 6220-01-661-0976
NSN 6240-00-201-9011