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 5925-00-106-7257
NSN 5960-00-952-1868
NSN 4140-01-115-3072
NSN 2925-00-113-6146
NSN 2925-00-078-0525
NSN 6105-00-030-7608
NSN 6135-01-388-2581
NSN 5915-01-546-2219
NSN 5855-01-105-7793
NSN 5835-00-987-9341
NSN 6220-01-143-8943
NSN 6610-00-290-0758