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 6145-01-417-2988
NSN 6240-00-404-7288
NSN 5950-01-052-6918
NSN 5990-00-962-2806
NSN 5895-01-231-3135
NSN 5925-01-212-7249
NSN 5905-00-584-5009
NSN 5935-00-006-3158
NSN 6240-01-114-6349
NSN 5975-01-621-7037
NSN 5835-01-190-5192
NSN 6130-01-202-4587