Grade 12.9 Black CSK Countersunk Head Self Tapping Drywall Screw Carbon Steel

Carbon Steel Grade 12.9 Black CSK Countersunk Head Self Tapping Drywall Screw

1,Description:

Phosphating dry-wall screws are the most fundamental product series, while blue and white zinc dry-wall screws are a supplement. The application scope and purchase price of these two are basically the same. The only slight difference is that black phosphating has a certain degree of lubricity, and the attack speed (the speed of penetrating steel plates of a specified thickness, which is a quality assessment index) is slightly better. Blue-white zinc has a slightly better anti-rust effect, and the natural color of the product is light, making it less likely to show color after coating decoration.

The accuracy of the screws is usually 6g (Class 2, the US specification "IFI" is 2A teeth), and the rough screws used in construction projects are 8g (Class 3, "IFI" is 1A teeth).The main purpose is to make industrial products composed of a fixed body, in the use of teeth and teeth often can not be close, too hard to lock the screw head is broken, or poor dental lock is not tight and failed to meet the conditions of use, are precision problems. Screws are "quantity products", not hand-made artworks, in mass production, in order to achieve high precision and stable quality and popular price supply to consumers for the purpose.

3,Specifications:

4,Feature Advantage:

The thread of single-line coarse-threaded drywall screws is wider, and the corresponding tapping speed is also faster. At the same time, since the structure of the wood material itself will not be damaged after being driven into the wood, they are more suitable for the installation of wooden keels than double-line fine-threaded drywall screws.
Abroad, in general construction, great emphasis is placed on choosing the right fastener products. Single-line coarse-threaded dry-wall screws, as an alternative to double-line fine-threaded dry-wall screws, are more suitable for use in the connection of wooden keels. In the domestic market, double-line fine-thread dry-wall screws have been used exclusively for a long time. It takes some time to change the usage habits.

5,About us

6.FAQ

Hunan Jiashan Hardware Tech as a branch company of J AND R METALWORK,established in 2007 and located in Changsha, Hunan, China.After almost 17 years management development and technical improvement, Jiashan is willing to be a leading supplier in hardware industry. Meanwhile, we are one of member of Hardware industrial Association and Green energy industry Association.

Jiashan is specialized in milling,turning,lathe 5 axis cnc machining parts,injection molding parts,alumium extrusion parts,laser cutting parts,sheet metal fabrication parts,wire edm parts,vacuum casting parts and fasteners.Those parts are widely service for electric vehicle,solar system,wind power system and construction machinery industry.

During17 years domestic and abroad market investigation, Jiashan's products are sold to many countries and regions including the North America, Europe, Australia, the Middle East and Asia. With owned the advanced cnc machinee, milling machine, polishing machine, stamping machine etc. Jiashan is able to degsin and produce varies OEM parts with drawings or samples provided. Further more, Jiashan also can help to provide a whole solution for modularity R&D of electric vehicle and solar system .

By constantly strengthening our management and consummate the quality guarantee system.In 2023, Jiashan acquired ISO9001:2008 quality certification. Currently,the 5S management mode is implemented in the whole Jiashan system.

Best quality and best service is and will be always our toppest concern.