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 6220-01-232-1572
NSN 5930-01-089-7620
NSN 5905-01-429-0747
NSN 6240-01-461-9635
NSN 5920-01-122-6303
NSN 6110-01-463-3155
NSN 6610-01-005-1190
NSN 5935-00-052-7791
NSN 6645-01-489-5426
NSN 5996-01-036-5639
NSN 5925-01-438-8542
NSN 6620-00-506-0112