8-18 x 1 3/4 Phillips Flat Self Tapping Screw Type AB Fully Threaded Black Oxide 1-8 N1610 With a diameter of 1/4

With a diameter of 1/4 inch and a length of 5 1/2 inches

The screws have a full thread

The needle point is self-piercing

The 4-4 size indicates that the nut has a nominal diameter of 4 inches and a thread size of 4 inches

8-18 x 1 3/4 Phillips Flat Self Tapping Screw Type AB Fully Threaded Black Oxide 1-8 N1610 With a diameter of 1/4The 8 18 x 1 3 4 Phillips Flat Self Tapping Screw Type AB Fully Threaded Black Oxide is a versatile and durable fastener designed for a wide range of applications. Made from high quality steel, this screw features a black oxide finish for enhanced corrosion resistance. Its self tapping design allows it to create its own threads in metal, plastic, and wood, eliminating the need for pre drilling. The Phillips flat head provides a flush, low profile