色播婷婷电影综合社区,AV女优不卡亚洲在线,99999AV,日韩人妻中文字幕视频,国产拍自偷,91人人妻,超碰在线81,免费福利视频一区,九草青草原在线看

The bimetal composite drill tail screw is a fully anti-corrosive stainless steel drill tail screw. The screw head and locking part are made of austenitic system stainless steel material (18-8); the tapping part and the front drill tail part are made of alloy steel (carbon steel), with a specially treated surface (Laspat). Superbly developed for anti-corrosion and corrosion resistance, it achieves excellent longevity. Since both the threaded drill tail and tapping zone are made of specially hardened metal, when driven into steel plates, the stainless steel part is introduced into the thread, completely eliminating the common issue of stainless steel tapping screws locking due to thread wear and deformation. This ensures perfect fastening while maintaining a high pull-out strength coefficient.
Structure and Performance of Bimetal Composite Screws:
1. SUS304/316 + heat-treated high-carbon steel composite alloy steel stainless steel drill tail screws.
2. Features: The composite stainless steel drill tail screw is fully anti-corrosive. The screw locking part and head are made of austenitic system stainless steel material; the tapping part and front drill tail part are made of alloy steel (or high-carbon steel material), with a specially treated surface. Developed for anti-corrosion, it achieves ideal longevity.
3. Both the screw drill tail and tapping zone are made of specially hardened metal. When driven into iron plates, the stainless steel part smoothly integrates into the metal, completely eliminating the common issue of stainless steel tapping screws locking due to thread wear and deformation, achieving complete fastening while maintaining a high pull-out strength coefficient.
4. Due to its unique drill tail design, it is suitable for installation in various wall materials and construction. In steel structure engineering, it achieves lightweight load and fast cutting speed.
5. For coastal areas and environments with high pollution, high temperature, humidity, marine conditions, carbonic acid, as well as environments with high emissions of sulfur-containing exhaust and particles from automobiles and factories—all of which cause metal oxidation and corrosion—its exceptional performance ensures complete corrosion resistance longevity.
Specializing in steel structures, roofing, wall panels, anti-corrosion coating screws, 304/316 austenitic bimetal composite coating screws, nylon head drill tails, painted screws, German-style self-tapping door and window screws, stainless steel self-tapping screws. WeChat/Phone: 18001482661