8 x 3 1/2 Square Drive Round Washer Head Deep Thread Wood Screw 2/3 Thread Black Oxide NF316 and its thread size is

and its thread size is M2

and feature a hex washer head that provides a secure hold

The 1/4-20 x 1 1/4 Phillips Flat Machine Screw Fully Threaded Black Oxide is a versatile and durable fastener designed for a wide range of applications

The 1/2-13 x 6 1/2 Carriage Bolt Grade 8 Fully Threaded Yellow Zinc is a high-strength fastener designed for heavy-duty applications

while the Phillips pan head provides a flush

8 x 3 1/2 Square Drive Round Washer Head Deep Thread Wood Screw 2/3 Thread Black Oxide NF316 and its thread size isThese 8 x 3 1 2" Square Drive Round Washer Head Deep Thread Wood Screws with 2 3 Thread and Black Oxide finish are designed for heavy duty wood applications. The square drive head provides a secure grip for driving, while the washer head helps to distribute the load and prevent the screw from sinking into the wood. The deep thread design provides superior holding power, and the black oxide finish offers corrosion resistance. These screws are ideal for