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 5895-01-230-8682
NSN 5935-00-347-4201
NSN 5999-00-577-2943
NSN 5965-01-389-7058
NSN 5950-01-123-9547
NSN 6130-00-531-3326
NSN 2925-01-544-4880
NSN 6685-00-170-9237
NSN 5999-00-403-5760
NSN 6150-01-285-3611
NSN 6320-00-432-2772
NSN 7035-00-585-2113