Heavy-Duty 18-8 Stainless Steel Type F Thread Cutting Screw, 82 Degree Flat Head, Phillips Drive, 5/16-18, 1 Inch Length, Plain Finish, Pack of 5 for Sheet Metal, Aluminum, Cast Iron and Plastic

Heavy-Duty 18-8 Thread Cutting Screw, 5/16-18, 1 in, pack of 5
✔️ Plain finish, 82-degree flat head, Phillips drive, Type F point, 5

These heavy-duty thread cutting screws are designed for metal and plastic fastenings, cutting their own threads as they go. They’re ideal for heavy gauge sheet metal, aluminum, cast iron, brass, and sturdy plastic assemblies where a flush, clean look matters.

✅ Size and thread: 5/16-18 machine screw thread
✅ Point style: Type F thread cutting point for heavy gauge metal
✅ Head: 82-degree flat head with flush seating
✅ Material: 18-8 stainless steel for corrosion resistance
✅ Finish: Plain finish (no coating) for broad compatibility
✅ Drive: Phillips drive to prevent over-tightening

💡 What is a heavy-duty thread cutting screw used for in metalwork?

This handy fastener is used in metalwork and plastic assemblies where strong, flush mounting is essential.

- Mating threads are cut into the hole wall to form a secure thread
- 18-8 stainless steel provides good corrosion resistance
- 82-degree flat head sits flush with countersunk surfaces
- Phillips drive helps prevent over-tightening and thread damage