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 6620-01-593-0817
NSN 5920-01-209-6368
NSN 5895-00-038-0847
NSN 6220-01-508-3408
NSN 5998-01-158-9971
NSN 5965-00-052-9184
NSN 6685-01-089-9606
NSN 6145-00-216-6613
NSN 6645-01-462-2101
NSN 6135-00-998-5884
NSN 5950-01-381-1361
NSN 6145-00-866-8994