Yeah Racing 4mm Aluminum Serrated Lock Nut (10) (Red) YEA-LN-M4S-RD

Yeah Racing 4mm Aluminum Serrated Lock Nuts are a great option when you need a light weight, flanged and serrated M4 lock nut. These are great for numerous applications, and are available in a variety of anodized colors. Package includes ten red anodized 4mm inner diameter flanged and serrated nylon lock nuts.