120 PCS Stainless Steel Self Drilling Screws,Self Tapping Screws for Metal(120 PCS, Round Head M3.5 & Round Head M4.2)

• 【HIGH QUALITY】: The round-head self drilling screws are made of 410 stainless steels, with excellent anti-rust and anti-corrosion ability, which are strong and durable.
• 【KIT QUANTITY】: The kit includes totally 120 self drilling screws in different sizes: M3.5*13(20PCS), M3.5*19(20PCS), M3.5*25(20PCS),M4.2*13(20PCS), M4.2*19(20PCS), M4.2*25(20PCS).
• 【DELICATE DESIGN】: The self tapping screw for metal adapts self-tapping, self-drilling Phillips design. The protruding head of the round head screw is very conducive to assembly. Besides, the cutter head on the drilling tail is sharp, which can easily drill into iron sheet and other steel structural plates.
• 【HIGH EFFICIENCY】: The self drilling screw can directly drill, tap and lock on the building material, which could complete the whole operation at one time. Therefore, it greatly saves the working time and improves the engineering efficiency.
• 【WIDELY USE】: The self drilling and self tapping screws are widely used in the fixation of colored tile steel, sheet iron, plastic steel, aluminum alloy and industrial plastic of steel structure, and also adopt in the production and maintenance of containers and steel windows. The self drilling screws are easier for user to assemble so that they are suitable for fixing items that need to be disassembled frequently.

The self-drilling & self-tapping screws with round heads are a kind of modified screws, also known as dovetail screws. They have better maintenance ability than ordinary screws. The larger round head is more conducive to the fixation of the fastened product so that they are also easier to assemble. Besides, they can connect structures more firmly, which would not loosen and could hold for a long time. If you need to fix some more solid objects, self-drilling and self-tapping screws are perfect choices.