5/16-18X3/4 Phillips Pan Thread Cutting Screw Type F Fully Threaded Zinc (Pack Qty 2,000) BC-3112FPP

Phillips Pan Thread Cutting Screw Type F Fully Threaded Zinc

Steel thread-cutters are used in heavy gauge sheet metal, aluminum, zinc and lead die castings, cast iron, brass and plastic. Stainless screws offer additional resistance to corrosion, 18-8 moreso than 410. When using any thread-cutting screw, the material in which the threads are cut should have a lower hardness by at least 10 to 20 Rockwell hardness points