4-40 x 5/16 Phillips Flat 100º Machine Screw Fully Threaded Zinc Black 2 1/2 The black oxide and oil

The black oxide and oil coating provides excellent protection against rust and corrosion

and is available in a variety of lengths to meet your specific needs

disc-shaped washer with a hole in the center

The #10 External Tooth Lock Washer is a high-quality fastener designed to prevent loosening due to vibration or other external forces

and a plain finish

4-40 x 5/16 Phillips Flat 100º Machine Screw Fully Threaded Zinc Black 2 1/2 The black oxide and oilThese 4 40 x 5 16 Phillips Flat 100 Machine Screws are fully threaded and coated in a durable zinc black finish. They are designed for use in a variety of applications, including metal, plastic, and wood. The Phillips flat head provides a flush, low profile finish, while the 100 point allows for easy starting and driving. These screws are strong and corrosion resistant, making them ideal for both indoor and outdoor use.