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 6645-01-651-2743
NSN 6620-00-959-6614
NSN 6240-00-845-9098
NSN 5930-01-410-7759
NSN 5975-01-192-4856
NSN 5999-01-494-3425
NSN 5920-00-185-3824
NSN 5998-00-920-8611
NSN 6240-00-740-8901
NSN 6645-00-979-6824
NSN 6220-01-197-6976
NSN 5990-00-736-8778