6-20 x 5/16 Phillips Pan Thread Cutting Screw Type 25 Fully Threaded Black Oxide and Oil NQHP The nut has a flange

The nut has a flange that helps to prevent it from loosening and a self-locking feature that ensures a secure hold

coated in durable zinc

The 1/2-13 x 1 1/2 Serrated Hex Flanged Washer Full Thread Screw Case Hard Zinc is a versatile and durable fastener designed for a wide range of applications

They have a sharp point and a single-flute thread that allows them to tap their own threads as they are driven into a material

With its 1/4-20 thread size and 5 1/2-inch length

6-20 x 5/16 Phillips Pan Thread Cutting Screw Type 25 Fully Threaded Black Oxide and Oil NQHP The nut has a flangeThese 6 20 x 5 16 Phillips pan thread cutting screws are Type 25 and fully threaded. They have a black oxide and oil finish. The screws are designed for use in metal and are self tapping, meaning they create their own threads as they are driven in. The Phillips drive head provides a secure grip for driving the screws. The screws are 5 16 inches long and have a diameter of 6 20. They are sold in packs of 100.