1/4-20 Serrated Flange Hex Lock Nuts Case Hardened HR15N 78/90 Black Zinc and Bake M5 The square head prevents the

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

this carriage bolt is suitable for use in construction

6mm thread pitch

5/16-18 x 2 Hex Tap Bolt Grade 8 Fully Threaded Plain is a high-strength fastener designed for demanding applications

The hexagonal head allows for easy installation with a standard wrench or socket

1/4-20 Serrated Flange Hex Lock Nuts Case Hardened HR15N 78/90 Black Zinc and Bake M5 The square head prevents theThese 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.