NAS1291X7 - Nut - Jet - Self-Locking - 7/16-20 - Low Height - Light Weight - 450 Degree - Steel, Cadmium II Plated

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 450 degrees. Thread size is 7/16-20 and hex size 1/2".