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Grade Class 12.9 Black Oxide Cadmium Plated Cross Recessed Round Head Wood Tapping Screw
1,Description:12.9级
The tail of the screw is generally shown as the shape of drilling tail, the hardness of this screw is very strong, compared with ordinary screws, not only the ability to maintain better, the effect of connecting the object is very firm, for this performance of the screw, generally do not need auxiliary processing, you can directly drill a hole on the object directly to lock the object, not only very convenient to use, It can also greatly improve the efficiency of work. This kind of drilling screw can be said to be the first choice of staff in various fields.
| Applications | |||||
| car | In high-strength applications such as automotive engines, heavy-duty machinery, and bridge construction, they are preferred for their larger support area and better anti-loosening performance. | ||||
| mechanical | Mechanical, electronic, automotive, construction and other fields, used to connect various mechanical parts, circuit boards, engines, transmissions, building structures, etc | ||||
| energy | For the energy industry, brackets and fixtures used to connect power generation equipment and transmission lines | ||||
| architectural | In the field of construction engineering, shipbuilding, and petrochemical industry, it is used to connect building structures, improve the navigation safety and stability of ships, and ensure the safety and stability of petrochemical equipment | ||||
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. 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).
3,Specifications:
| material | |||||
| aluminium | Aluminum has excellent thermal and electrical conductivity. However, aluminum is naturally soft and may produce gelatinous buildup after processing. If not properly operated, it is difficult to cut during processing. | ||||
| titanium | Edm machining is well suited for titanium because the process can withstand the viscosity of this alloy and break down lengthy chips. However, deionized water is needed as a medium to help control the heat generated during processing. | ||||
| steel | Steel is a very strong metal, and many manufacturers tend to use wire cutting machines instead of CNC machines for machining complex steel features. However, this material generates a lot of heat, so necessary precautions need to be taken. | ||||
| brass | Brass has a high tensile strength and is easy to cut by machine. But the cutting speed should be slow because it is a soft metal. | ||||
4,Feature Advantage:
Reaching grade 12.9 requires smelting processes rather than steel standards. 1.8.8 grade bolts: Generally, medium carbon steel or alloy steel is used, such as No. 45 steel or 40Cr steel. Bolts of this grade have undergone heat treatment and possess excellent mechanical properties. 2. 10.9 grade bolts: Alloy structural steels such as 40Cr or 42CrMo steel are mostly used. They are generally quenched and tempered to enhance their strength and toughness. 3. 12.9 grade bolts: Alloy steel is usually selected, such as 34CrMo4 or 42CrMo, etc. This type of bolt undergoes strict heat treatment to meet the requirement of high strength
5,About us
6.FAQ
A: We are factory and OEM are available.
A: Generally it is 7-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
A: 30% T/T in advance ,balance before shippment or L/C.
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