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 5895-00-102-7635
NSN 6150-01-398-2736
NSN 5999-01-437-8843
NSN 5975-01-554-3158
NSN 5950-01-606-8782
NSN 6650-01-145-9570
NSN 5998-00-934-1086
NSN 5925-00-718-7530
NSN 5996-00-818-1148
NSN 6620-01-377-0414
NSN 5945-00-480-3732
NSN 5998-00-185-4182