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 5950-01-113-7834
NSN 5910-01-044-5615
NSN 6240-00-452-5241
NSN 5895-01-099-9393
NSN 6620-01-643-5531
NSN 5985-00-412-3294
NSN 6320-01-211-6578
NSN 5950-01-557-7304
NSN 5915-00-455-7703
NSN 6645-01-379-7725
NSN 6150-01-219-6279
NSN 5945-01-346-8604