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 4140-00-555-3856
NSN 5905-00-497-9410
NSN 5855-00-918-1622
NSN 5920-01-512-0047
NSN 6220-01-535-8788
NSN 5905-01-020-8389
NSN 5855-01-602-9653
NSN 6645-01-105-2239
NSN 5999-01-215-0939
NSN 6135-01-142-2417
NSN 6645-00-211-6906
NSN 5910-01-654-5129