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 4140-01-248-4610
NSN 6610-00-290-0758
NSN 5998-00-217-8579
NSN 7035-00-179-3924
NSN 5905-00-235-7890
NSN 6105-00-737-0829
NSN 5998-01-417-2852
NSN 6135-00-497-0491
NSN 5998-01-105-1769
NSN 6135-01-190-2628
NSN 6150-00-223-5840
NSN 5998-00-176-2227