Collar with washer
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 6240-00-472-4635
NSN 5999-01-151-2946
NSN 5950-01-371-2588
NSN 6320-01-466-4175
NSN 5990-01-334-8634
NSN 6220-01-396-0322
NSN 5998-00-752-1162
NSN 5999-01-230-9657
NSN 6645-01-219-5911
NSN 2925-01-014-0118
NSN 6685-01-538-6371
NSN 4140-00-293-3619