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 6135-00-702-2772
NSN 5990-00-826-7928
NSN 5915-01-403-2599
NSN 6610-00-844-4871
NSN 5835-01-250-6027
NSN 6685-01-460-0586
NSN 5960-00-905-7796
NSN 6150-00-118-6135
NSN 5930-00-627-0277
NSN 5960-01-512-0233
NSN 5975-01-622-6328
NSN 5965-00-060-0090