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 5855-01-445-6551
NSN 6105-01-577-5310
NSN 6130-00-003-7464
NSN 5910-01-616-2177
NSN 6110-01-463-3395
NSN 4140-01-441-2339
NSN 6620-00-684-6771
NSN 5895-00-715-0896
NSN 6650-01-218-9337
NSN 5905-01-449-5307
NSN 6610-01-100-3662
NSN 6135-00-593-6831