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 6150-01-521-4834
NSN 4140-01-534-0361
NSN 5985-01-202-4860
NSN 2925-00-350-0348
NSN 5895-00-835-7084
NSN 5950-01-622-1616
NSN 5996-01-188-7548
NSN 5935-01-111-3987
NSN 6150-01-173-9181
NSN 6650-01-437-8852
NSN 4140-01-500-2334
NSN 5855-01-180-5369