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It is designed to countersink into the material
The 6-lobe flat head provides a secure and flush fit
It has a self-drilling tip that eliminates the need for pre-drilling
These screws are designed for use in metal and are self-threading
4-40 x 1/4 Phillips Pan External Sems Machine Screw Fully Threaded 410 Stainless Steel DPG188 It is designed to countersinkThis 4 40 x 1 4 Phillips pan external sems machine screw is fully threaded and made of 410 stainless steel. It has a Phillips drive and a pan head. Sems screws are self locking, meaning they do not require a nut or washer to stay in place. They are often used in applications where vibration or loosening is a concern. This screw is 1 4 inch long and has a diameter of 4 40. It is made of 410 stainless steel, which is corrosion resistant and durable.
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