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 6240-01-358-6472
NSN 6135-00-235-1938
NSN 2925-01-542-9403
NSN 6685-01-038-8482
NSN 5945-01-287-4285
NSN 6620-01-359-0476
NSN 5905-00-975-4362
NSN 5985-00-203-5876
NSN 5930-00-438-6774
NSN 5960-00-991-1135
NSN 6135-00-274-4037
NSN 5855-01-354-7291