Product Name:Flange Locknuts Sizes: M2~M6 Mode of action:locking Material:Aluminium Alloy Surface:anodic oxidation Product Strength:Grade 4.8 Note: 1.Due to guide measurement, please enable slight errors. 2.Due to differences between assorted displays, the photographs might not replicate the actual colour of the item. 3.If you've any questions on the product, please feel free to touch us. We will offer you a reply as soon as possible. 4.We not just do retail, But also do wholesale,If you want to purchase extensive quantity,please touch us.We will calculate the small print and give you a good price. 5. Thank you a great deal for your support. Have a nice shopping!