MS21043-6 - Nut - Self-Locking - Reduced Hex, Reduced Height - 800 Degree - Jet - 3/8-24 - Silver Plated Stainless (alt part # NAS679C6, NAS1021C6, NAS1022C6, NAS1291C6)

A special type of all metal sef-locknut that is commonly used in aerospance and racing. They are widely used in limited space applications where wrench access can be a problem. On average, these lock nuts are 63% lighter than average AN365 nylon nuts and withstand temperatures to 800 degrees. Thread size is 3/8-24 and hex size 7/16". Silver plated stainless.