#8 Phillips Drive Oval head Countersunk Self Tapping Sheet Metal Screws Stainless Steel. Oval heads are countersunk (cone shaped under the head) with a rounded top. Phillips drive is x-shaped for installation with a phillips screw driver. Sheet metal screws have sharp threads that cut into a material such as sheet metal, plastic or wood. They also make excellent fasteners for attaching metal hardware to wood because the fully threaded shank provides good retention in wood. SHEET METAL SCREWS HAVE SHARP THREADS THAT CUT INTO MATERIALS SUCH AS. And of course sheet metal. Sheet metal screws are also the go to fasteners for use with plastic wall anchors in drywall. Tapping screws are considered externally threaded fasteners that “tap” their own mating threads in metallic and non-metallic (such as plastic) materials. Tapping screws, especially Type A, are referred to as “sheet metal screws” because one of their first applications was in ventilation ducts made of sheet metal. The design is often criticized for its tendency to cam out at lower torque levels than other “cross head” designs. There has long been a popular belief that this was actually a deliberate feature of the design, for the purpose of assembling aluminum aircraft without over tightening the fasteners. About Self tapping Screws. A self-tapping screw is a screw that can tap its own hole as it is driven into the material. Some self-tapping screws are also self-drilling, which means that, in addition to the tap-like flute in the leading threads, there is also a preliminary drill-like fluted tip that looks much like the tip of a center drill. Material : Stainless Steel 18-8. Overall Length : Choose Desired Length From Drop Down Menu. Quantity of Fasteners in Package : Choose Desired Item Package Quantity From Drop Down Menu. Head Diameter : 0.312. Head Height : 0.152. Countersink Angel : 82 Degree. Thread Diameter : 0.164. Thread Coverage : Full Thread. Point Style : Type A Self Tapping. Oval head screws have a slightly domed top that tapers down to a cone shape at an 82 degree and will sit into a countersunk hole giving a decorative appearance. Phillips oval head sheet metal screws with a self tapping thread patern that forms its own threads in the material it is being screwed into and is mainly used for attatching two pieces of metal together but also works great in wood and plexiglass because of the coarse thread. Made from stainless steel grade 18-8 which offers a high level of chemical and corrosion resistance that will out perform and out last all zinc plated fasteners for years with out the need to perform costly and time consuming maintenance; 18-8 stainless steel flat head sheet metal screws are a better choice than 410 self drilling screws in out door applications that will be visible because unlike 410 stainless with a high iron content these screws have a low iron content and will not rust or turn red. These oval head self tapping sheet metal screws will have no problem punching through a thin or light guage sheet metal but will require a pilot hole for a thicker guage metal. Fastenere brand stainless steel sheet metal screws offer the corrosion resistance and strength that makes them the best choice for an application that is exposed to a wet or damp enviroment and will withstand the test of time. Tracking is provided on ALL Orders. UPS Next Day Air is available, Please inquire for pricing. For YOU, we constantly strive to find ways to improve our performance.