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 6220-01-631-4422
NSN 5935-01-342-1348
NSN 5930-00-225-8861
NSN 5965-01-513-6540
NSN 6685-01-464-3128
NSN 5920-00-569-6435
NSN 6220-01-113-8861
NSN 5930-01-069-4266
NSN 5960-01-419-2167
NSN 6610-00-075-0655
NSN 5930-00-851-6984
NSN 6645-00-789-8095