M3 Black Speaker Screws Grade 8 Hex Socket Cap Head Steel Black Oxide Allen Self Tapping Screw Cylinder Headed for Wood/Plastic Mounting

Description

These self-tapping M3 black speaker screws are perfect for providing a clean, professional look to your next speaker project. You have the look of cap head screws without having to deal with the hassle of threaded inserts. Made of steel with heat treatment and black oxide, it has an ability of rust resistance and super hardness, which can ensure a long time using. And the compact thread is not easy to be out of shape and slid in the process of rolling. The deep and clear hex sockets and heads can make your working more easily. Widely used in home and office furniture, machinery, communication equipment, toolbox, and many other areas. Please carefully check the size details before place an order to make sure this size is what you want. Ever Hardware provides precision speaker screws and customizable packaging.

• Hex wrench to prevent screwdriver from slipping and damaging your driver
• Cap head screws give your installations a neat, professional look
• The heat-treated & oxide steel material resists corrosion and provide hardness
• Self-tapping threads eliminate the need for a pilot hole

The M3 black speaker screws are a screw with a 6mm diameter of thread that can tap its own hole as it is driven into the material. For softer substrates such as wood or soft plastics, the self-tapping ability can come simply from a tip that tapers to a gimlet point (in which no flute is needed). Like the tip of a nail or gimlet, such a point forms the hole by displacement of the surrounding material rather than any chip-forming drilling/cutting/evacuating action.
Heat treating is a group of industrial and metalworking processes used to alter the physical, and sometimes chemical, properties of a material. Heat treatment involves the use of heating or chilling, normally to extreme temperatures, to achieve the hardening of a material. Heat treatment techniques include annealing, case hardening, precipitation strengthening, tempering, normalizing and quenching.
Black oxide or blackening is a conversion coating for ferrous materials, stainless steel, and other materials. It is used to add mild corrosion resistance, for appearance and to minimize light reflection. To achieve maximum corrosion resistance the black oxide must be impregnated with oil or wax. One of its advantages over other coatings is its minimal buildup.