Good Quality M8x20 Hex Bolt - Hexagon Socket Bolt Allen bolt – Changlan

Product Description

1. Cylon 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. Generally used hexagonal socket cylindrical head screws and 4.8, 8.8, 10.9, 12.9 class

2. Hexagon socket bolts are divided into ordinary and high strength bolts according to the strength grade. Ordinary hex socket bolts refer to grade 4.8, high strength hex socket bolts refer to grade 8.8 or above, including grades 10.9 and 12.9. Grade 12.9 socket head screws are usually black socket head screws with knurled, natural color and oil.

3. Similar to countersunk head screw, the screw head is embedded in the machine parts, the connection strength is large, but the screw must be installed and removed with the corresponding specifications of the hexagon wrench. Generally used in all kinds of machine tools and their accessories

Specification

Screw head is outside the circular hollow hexagonal shape, this kind of screw we call socket head cap screw, need special wrench to fixed and remove the screws, generally in the hardware store has a special sell hex wrench, screw biggest role is to have the fixed effect, and the inner hexagon screws fixed on mainly used machinery, The advantage of this is that it is easier to fix and avoid the consequence of slippery wire. In addition, it is easy to disassemble. This hexagon wrench and the hexagon wrench cooperate with each other, because the hexagon wrench is 90°, it saves energy to disassemble.