Product Details
The 1/4-20 x 3/4 Six Lobe Flat Floor Board Screw Type F features a black phosphate finish and is classified as a thread-cutting type-F threaded screw. It is designed for use with heavy gauge sheet metal, aluminum, zinc and lead die castings, cast iron, brass, and plastic. When working with stainless steel, it is recommended that the material being threaded has a lower hardness by 10-20 Rockwell hardness. The flat head design ensures that the fastener does not protrude above the mating surface, typically being offered in a 100-degree flat for standard applications or an 82-degree flat for the fastening of softer materials.
