Product Details
The 1/4-20 x 1 1/4 six lobe flat thread cutting screw type F is fully threaded and made of zinc bake. This type F thread-cutting screw is specifically designed for use in heavy gauge sheet metal, aluminum, zinc and lead die castings, cast iron, brass, and plastic applications. When utilizing stainless steel, it is essential for the material into which the screw will cut threads to possess a lower hardness by 10-20 Rockwell hardness. This flat head screw is ideal for scenarios where protrusion of the fastener above the mating surface is unacceptable, and it typically features a 100-degree flat head for general use or an 82-degree flat head for fastening softer materials.
