6-13 x 3/4 Square Phil Drive Flat w/Nibs Deep Thread Wood Screw Full Thrd 17point Zinc WUSS316 and it has a thread

and it has a thread size of M3-0

These lock nuts are commonly used in automotive

It features a Phillips pan head with a #2 square drive

Crafted from high-strength steel and coated with a corrosion-resistant zinc finish

6-13 x 3/4 Square Phil Drive Flat w/Nibs Deep Thread Wood Screw Full Thrd 17point Zinc WUSS316 and it has a threadThese 6 13 x 3 4 inch square drive flat head wood screws with nibs and deep threads provide superior holding power in wood applications. Made of durable zinc plated steel, they feature a 17 point star drive for easy installation with minimal cam out. The flat head design sits flush with the surface for a clean, finished look. The nibs on the tip help prevent splitting and ensure a secure grip. These screws are ideal for a wide range of woodworking