1/4-20 Serrated Flange Hex Lock Nuts Case Hardened HR15N 78/90 Black Oxide NR They are made from high-strength

They are made from high-strength steel and have a black phosphate finish for corrosion resistance

The DIN 933 standard specifies the dimensions and tolerances for this type of screw

this screw boasts a Grade 8 rating

and a rib neck diameter of 0

1/4-20 Serrated Flange Hex Lock Nuts Case Hardened HR15N 78/90 Black Oxide NR They are made from high-strengthThese 1 4 20 Serrated Flange Hex Lock Nuts are made from case hardened HR15N steel and have a black oxide finish. They are designed to provide a secure hold on bolts and screws, even in high vibration applications. The serrated flange helps to prevent the nut from loosening, and the hex head allows for easy tightening and removal. These nuts are ideal for use in a variety of applications, including automotive, construction, and manufacturing.