Tapping Screw DIN7971high strength 4.8 6.8 8.8 10.9 12.9 manufacture wholesale price

1. Tapping screws are screws with a drill bit. The inner hexagonal bolts are constructed by special electric tools, drilled, tapped, fixed and locked once. Self-tapping screws are mainly used for some board connection and fixed, such as the connection of color plate and color plate, color plate and purlin, wall beam connection, its penetration generally does not exceed 6mm, the maximum does not exceed 12mm.
2. Self-tapping screws are often exposed outdoors and have strong corrosion resistance. The rubber sealing ring can ensure that the screw does not seep water, good corrosion resistance.
3. Tapping screws are used in wood materials and are usually called wood screws. Due to manual limitations, such screws are usually manually operated and therefore have a narrow range of use.
4. Self-tapping screws bind the corkscrew to the bolt. The front is tapered and the back is threaded. For generally soft materials, after drilling can be directly screwed into. Tap out the thread with the corkscrew and tighten the screw. If the screw diameter is small, the material is also soft. It can also be used before drilling, such as by screwing in wood.
5. Tapping screws are usually described by three parameters: screw diameter series, number of threads per inch, and screw length. Screw diameter series are 10 and 12, corresponding screw diameter is 4, 87mm and 5.43mm; There are 14, 16, and 24 grades of threads per inch. The more threads per inch, the better the self-drilling capability. 5. Tapping screws are usually described by three parameters: screw diameter series, number of threads per inch, and screw length. Screw diameter series are 10 and 12, corresponding screw diameter is 4, 87mm and 5.43mm; There are 14, 16, and 24 grades of threads per inch. The more threads per inch, the better the self-drilling capability.

1. Plastics, box, carton
2. Packing as customers’ request

One thousand pieces of steel≈kg

Material: steel, mechanical properties and material grades according to DIN 267-12

YungChang (YC) is a fastener manufacture enterprise, major product includes bolts, nuts, crews, pins, anchors, hose clamp, and special customized, use high quality raw material which originate from imported or domestic large-scale steel factory, the production applies advanced ERP management system and flexible operation model. By its top-grade talent and first-class producing equipment, High quality, various item, different colour and excellent service. The capacity per year is over 30 thousands tons, which is the main manufacturer of high strength fasteners in China, supplying products to European Union, Southeast Asia, Africa , Japan, Korea, and American markets.