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 6240-00-615-8243
NSN 5985-00-235-2048
NSN 5915-00-203-2859
NSN 2925-00-081-3547
NSN 7035-01-419-4317
NSN 5925-01-460-6041
NSN 6240-01-147-0379
NSN 6130-00-253-3901
NSN 7035-00-703-3535
NSN 5950-01-451-4538
NSN 6650-01-384-0529
NSN 7035-01-114-3134