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 6130-00-170-4844
NSN 6620-01-026-0346
NSN 6650-01-364-8504
NSN 5950-01-219-2572
NSN 5950-01-391-0030
NSN 5975-01-374-0829
NSN 5999-00-354-4613
NSN 5905-00-455-7272
NSN 6240-01-660-7905
NSN 5945-01-104-0898
NSN 5985-01-207-0097
NSN 6150-00-998-8608