1/4-20 Serrated Flange Hex Lock Nuts Case Hardened HR15N 78/90 Black Zinc and Bake M5 This 1/2-13 x 1 3/4

This 1/2-13 x 1 3/4 Hex Head Flange Non Serrated Frame Bolt is made of high-strength steel and features a black phosphate finish for corrosion resistance

Its 3/4-10 thread size and 2 1/2-inch length make it ideal for a wide range of projects

6mm thread pitch

The square head prevents the bolt from turning when it is tightened

meaning they do not have a coating or finish

1/4-20 Serrated Flange Hex Lock Nuts Case Hardened HR15N 78/90 Black Zinc and Bake M5 This 1/2-13 x 1 3/4These 1 4 20 Serrated Flange Hex Lock Nuts are made of case hardened HR15N steel and feature a black zinc and bake finish. They have a serrated flange that helps to prevent loosening and a hex head for easy installation. These lock nuts are ideal for use in a variety of applications, including automotive, construction, and manufacturing. They meet the specifications of ASTM A563 Grade C and are RoHS compliant.