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 5996-01-074-8161
NSN 5910-01-125-5491
NSN 5999-01-243-0121
NSN 5950-00-897-6439
NSN 5950-01-529-5742
NSN 6135-01-528-2830
NSN 5960-01-148-2297
NSN 5855-01-634-0259
NSN 6240-01-183-5425
NSN 6130-01-107-8333
NSN 2925-01-389-6874
NSN 5835-01-104-5707