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 5920-01-560-4199
NSN 5999-00-445-5227
NSN 5920-00-476-0528
NSN 6645-01-071-7515
NSN 6620-00-943-0449
NSN 6240-01-136-1018
NSN 5975-00-357-6136
NSN 5996-01-159-7866
NSN 5985-01-542-7475
NSN 6135-01-036-3495
NSN 6320-01-281-6028
NSN 5920-01-339-3722