Cylindrical head hex socket screw, also referred to as hex socket bolt, cup head screw, hex socket screw, its name is not the same, but the meaning is the same. Commonly used hexagon socket head screws are grade 4.8, 8.8, 10.9, 12.9. Also called hex socket screw, also called hex socket bolt.
| NAME | Hexagon socket head cap screws |
| Standard | GB/T 70 ISO 4762 DIN 912 ASME B 18.3 JIS B 1176 ISO 10642 DIN 7991 ISO 7380 JIS B 1174 |
| Size | M5～M64 |
| 1/4～4 | |
| Length | 40mm～1500mm |
| Grade | 4.8 5.8 6.8 8.8 10.9 12.9 |
| Material | Carbon steel、Stainless steel、355 35K 45# 40Cr 35CrMo 42CrMo |
| Surface | black, zinc plated, color zinc, hot dipped galvanized, dacromet |
| Scope of application | Cylindrical head hex socket screw, also referred to as hex socket bolt, cup head screw, hex socket screw, its name is not the same, but the meaning is the same. Commonly used hexagon socket head screws are grade 4.8, 8.8, 10.9, 12.9. Also called hex socket screw, also called hex socket bolt. |
| Form a complete set of | Hexagon socket bolt according to the hardness of screw wire, carrying tension, yield strength and so on, there is a grade classification, that is, the level of hexagon socket bolt, hexagon socket bolt is what level. Different products and materials are required to have different grades of hex socket bolts corresponding to them. Hex socket bolts all have the following grades: Hexagon socket bolts are divided into ordinary and high strength bolts according to grade strength. Ordinary hex socket bolts refer to class 4.8, high strength hex socket bolts refer to class 8.8 or above, including class 10.9 and class 12.9. Hex socket bolts of grade 12.9 are generally black HEX socket cup head screws with knurling, natural color and oil. |
| Construction operation technology | Similar to countersunk head screws, the nail head is embedded in the machine, and the connection strength is greater, but the corresponding specifications of the Allen wrench must be used to install and remove the screws. Generally used in all kinds of machine tools and accessories. |