5/16-18 Serrated Flange Hex Lock Nuts Case Hardened HR15N 78/90 Black Zinc and Bake D6923RA2 this nut offers a secure

this nut offers a secure and reliable connection

Its strength and durability make it a reliable choice for demanding projects

Crafted from high-grade steel

They are also great for use in outdoor applications as the zinc coating helps to protect them from rust and corrosion

5/16-18 x 2 1/4 Hex Cap Screw Grade 2 Non A307 Black Oxide and Oil:

5/16-18 Serrated Flange Hex Lock Nuts Case Hardened HR15N 78/90 Black Zinc and Bake D6923RA2 this nut offers a secureThese 5 16 18 Serrated Flange Hex Lock Nuts are made of case hardened HR15N steel and are finished in black zinc and bake. They have a serrated flange that helps to prevent loosening and are ideal for use in applications where vibration is a concern. These nuts meet the requirements of ASTM A563 Grade C and are RoHS compliant.