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 4140-01-314-4697
NSN 6685-01-250-2408
NSN 5920-01-058-1778
NSN 5855-01-607-6521
NSN 6150-00-152-9901
NSN 6610-01-448-8904
NSN 6135-01-430-3119
NSN 5990-01-013-0793
NSN 5895-00-125-5465
NSN 6620-00-806-7936
NSN 5965-00-335-0305
NSN 7035-01-412-8322