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 5965-01-141-6485
NSN 5855-00-156-4993
NSN 5905-01-411-6918
NSN 5950-01-139-4371
NSN 6645-01-397-7277
NSN 6650-01-050-5974
NSN 6685-01-474-4926
NSN 5999-01-302-0903
NSN 6135-01-222-0703
NSN 4140-01-147-4764
NSN 6220-01-593-7120
NSN 6620-00-343-5602