| Item |
Hex Socket Screw |
| Grade |
4.8/8.8/10.9/12.9 A2-70, A4-70, A4-80 |
| Material |
Carbon Steel ,Alloy Steel,Stainless Steel and Copper |
| Surface Treatment |
Black, Zinc Plated(ZP), Yellow Zinc Plated (YZP)and Hot DIP Galvanizing(H. D. G. ), Dacromet, Nickel Plated, Brass Plated. |
• Carton size : The ordinary carton (27*25*14.5CM) , or according to the demand of the customers.
• Packing : plastic bags,Box, carton , then put on pallets, or according to the demand of the customers.
Hexagon bolt DIN912/ISO4762 also known as the cup head hexagon bolt, the shape of the cylindrical head, the groove of the hexagon polygon. The corresponding Chinese standard is GB70.1. Thread diameter can be M1.4-M64, metric coarse teeth, product grade is generally class A. Thread tolerance is 5g6g for grade 12.9, 6g for other grades. Hexagonal cylindrical bolts are widely used in mechanical installation because they are easy to tighten, disassemble and not easy to slip. The installation and disassembly of the hex cylindrical head bolt should use the hex wrench, which is a tool with 90 degrees bending, divided into short and short sides, when using the short side to install the screw, the long side of the hand can exert less force to achieve the role of tightening the screw. The long end of the tool is generally used for the installation and removal of screws in the assembly of deep hole positions. B Surface treatment: boiling black, galvanized, non-electrolytic chip coating, zinc-nickel coating, etc. About DIN912/ISO4762 hex bolt inspection method: Different use environment, the quality of the product needs to carry out some specific testing to ensure that meet customer needs and safety in use, the general inspection items in addition to the common appearance testing and stop-gauge and other basic testing as well as mechanical testing and chemical testing. Such as tensile test, impulse test, surface hardness and core hardness, torsion test, salt spray test and so on.
• We are a typical China supplier with more than 10 years experiences on fasteners.We are professionally exporting under the standards of DIN, JIS, GB, ANSI, and BS, as well as nonstandard fasteners. Now we have gained close cooperation with clients from Canada, Dubai, Europe, India,Chile,Peru and Russia, and won good comments from users. We always fulfilling customers' expectations by following the principle of "Providing services whenever and wherever our customers need it" to establish a steady beneficial relationship and wining customers' hearts. If you need more information, please contact our sales department.
Audited Supplier 
){kind=link}