Jiaxing Haina Fastener Co.,Limited
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A2 A4 Socket Button Cap Customized Flat Head Machine Screw For Railway
Description:
Chinese standard for the button head socket cap screw GB/T 70.2-2008. Socket cap screws are a headed and externally threaded part designed for insertion through a close tolerance, internally tapped hole and mated with a nut. Tension on the socket cap screw is induced by rotation of the screw head. There is a hex socket in the head that accepts a hex wrench to tighten the socket cap screw. The point at the threaded end of the socket cap screw is machined flat so it will fit into a drilled hole. Button head socket cap screws have a domed-shaped head that is wider.
Hexagon flat head screws are made of two kinds, both are commonly used materials, stainless steel and carbon steel, carbon steel, we generally refer to iron, carbon steel hardness by grade points, low carbon steel, carbon steel, high carbon steel three. So hex flat head screws of strength class 4.8, 8.8, 10.9, 12.9 of these categories.
Stainless steel is generally divided into SS304 SS316 A2 A4. Stainless steel has strong corrosion resistance. Mechanical properties of stainless steel screws stronger than steel screws.
Specification:
| Name | A2 A4 Socket Button Cap Customized Flat Head Machine Screw For Railway |
| Standard | ISO7380 |
| Head Type | Button Head |
| Thread Syste | International |
| Material | Stainless steel A2 |
| Surface treatment | plain |
| Size | M8 |
| Packaging | 25 carton + pallet |
| Diameter d1 | M2.5 | M3 | M4 | M5 | M6 | M8 | M10 |
| r1 | — | 3 | 4.1 | 5.2 | 5.6 | 7.5 | 10 |
| t | — | 1.35 | 1.5 | 2.2 | 2.4 | 3.15 | 3.8 |
| s | — | 2 | 2.5 | 3 | 4 | 5 | 6 |
| k | — | 1.6 | 2.1 | 2.7 | 3.2 | 4.3 | 5.3 |
| d2 | — | 5.5 | 7.5 | 9.5 | 10.5 | 14 | 18 |
Application:
Stainless steel machine Screws are mainly for railway and road bridges, steel boilers, industrial plants, high-rise buildings, tower mast structure, lifting machinery and steel structures need to use a combination of friction-type high screw occasions.
Advantages:
1. Reply you in 24 working hours.
2. Experienced staffs would like to answer all your questions in time.
3. Customized design is available. ODM&OEM are welcomed.Excellent quality control system for fine dimensional accuracy.
4. Various materials are available as per your request
5. Conform to international standard.
6. We had got certificate of ISO9001: 2008, SGS & RoHS.
7. Prompt delivery.
8. Various sizes are available.