8-11 x 2 1/4 Square Drive Round Washer Head Deep Thrd Type 17 Wood Screw 2/3 Thrd Zinc & Bake FTP which means that it will

which means that it will not loosen due to vibration or movement

These 4-40 x 5/16 Phillips pan head split lock and regular flat washer Sems full thread screws are made of 18-8 stainless steel

They are designed for use in metal applications and feature a 6-lobe drive that provides increased torque and reduces cam-out

25 x 20 size indicates a diameter of 8mm

8-11 x 2 1/4 Square Drive Round Washer Head Deep Thrd Type 17 Wood Screw 2/3 Thrd Zinc & Bake FTP which means that it willThese 8 11 x 2 1 4 inch square drive round washer head deep thread Type 17 wood screws are made of zinc and baked for durability. They have a 2 3 thread and are designed for use in wood applications. The square drive head provides a secure grip for driving, and the washer head helps to distribute the load and prevent the screw from sinking into the wood. These screws are ideal for a variety of projects, including framing, decking, and cabinetry.