1/4-14 x 2 1/2 Unslotted Hex Washer With Number 5 Point Full Thread Self Dril Screw Zinc Bake 1/4-20-1 The nut has a 5/16-18

The nut has a 5/16-18 thread size and an offset hole for spot welding

These 4-40 x 3/8 Phillips flat 100º machine screws are fully threaded and zinc black in color

This 1/4-20 x 1 3/4 Phillips oval machine screw is fully threaded and made of 18-8 stainless steel

while its 5/8 SAE size makes it compatible with a wide range of bolt and screw diameters

1/4-14 x 2 1/2 Unslotted Hex Washer With Number 5 Point Full Thread Self Dril Screw Zinc Bake 1/4-20-1 The nut has a 5/16-18This 1 4 14 x 2 1 2 inch unslotted hex washer head screw features a number 5 point and full thread design. It is self drilling, making it ideal for use in metal applications. The zinc bake finish provides corrosion resistance.