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 5985-00-452-2228
NSN 2925-01-491-3270
NSN 5945-01-623-1367
NSN 5910-01-365-8031
NSN 6105-00-301-5334
NSN 5910-01-157-8366
NSN 5910-01-139-5085
NSN 5999-01-337-7162
NSN 5930-01-045-5531
NSN 7035-00-111-4389
NSN 6110-00-477-4558
NSN 6610-01-525-8235