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 6645-01-467-9983
NSN 5855-00-918-1622
NSN 6610-01-511-5260
NSN 7035-01-411-6062
NSN 4140-00-111-2617
NSN 6645-00-060-9809
NSN 5965-00-539-7778
NSN 7035-01-467-8921
NSN 5985-01-557-4957
NSN 5950-00-230-2809
NSN 5975-00-685-9549
NSN 6685-01-411-5969