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 5998-01-531-3678
NSN 5930-01-334-1581
NSN 6645-01-421-6909
NSN 6130-01-199-9705
NSN 6150-01-115-8426
NSN 6610-01-376-9199
NSN 5855-01-601-7005
NSN 5990-00-160-1176
NSN 5990-01-411-5930
NSN 5960-00-657-7823
NSN 5935-00-006-1481
NSN 6105-01-426-7906