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 2925-00-149-0760
NSN 6650-00-336-0753
NSN 6240-01-304-6355
NSN 5905-00-830-9027
NSN 5990-01-516-9665
NSN 6620-01-544-8735
NSN 5950-01-274-3328
NSN 6685-01-084-0256
NSN 5996-00-982-5496
NSN 5925-01-185-1390
NSN 5950-00-872-6638
NSN 6110-00-100-4775