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 6620-01-082-7326
NSN 5905-01-236-8621
NSN 5920-00-935-2275
NSN 6240-00-087-6684
NSN 6130-00-847-8040
NSN 6130-00-721-4156
NSN 6320-01-050-1290
NSN 6650-00-113-7698
NSN 6620-00-456-9539
NSN 5985-01-477-9907
NSN 6240-01-571-7706
NSN 5996-01-030-1387