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 6110-01-042-4117
NSN 5965-01-398-0779
NSN 5960-01-328-8248
NSN 6685-00-468-5887
NSN 5985-00-754-5426
NSN 6650-01-413-0133
NSN 5920-01-398-7123
NSN 6620-00-500-0041
NSN 5910-00-154-8180
NSN 6685-01-583-0629
NSN 5950-01-379-7016
NSN 6145-01-497-3554