Cheap wholesale price for stainless steel hexagonal bolts 304 201 316

External hexagonal screw is a screw used in conjunction with a nut to fasten and connect two connected parts with through-holes, which is used for componentsThe open end wrench used for the outer hexagon corresponds more accurately to the hexagon nut, as there are hexagon head bolts and small hexagon head bolts. The commonly used open end wrench specifications are 7, 8, 10, 14, 17, 19, 22, 24, 27, 30, 32, 36, 41, 46, 55, 65; The corresponding thread specifications are M4, M5, M6, M8, M10, M12, M14, M16, M18, M20, M22, M24, M27, M30, M36, M42.

The minimum specification in the complete set of hexagonal wrenches is 3, which corresponds to S3=M4, S4=M5, S5=M6, S6=M8, S8=M10, S10=M12, S12=M14-M16, S14=M18-M20, S17=M22-M24, S19=M27-M30, S24=M36, S27=M42.

The calculation method for the diameter of the bottom hole of the thread before tapping: for brittle materials, the basic size -1.0826 thread pitch is used. For plastic materials, the basic size - thread pitch+0.1 brittle materials are in a pure cutting state during tapping. The bottom hole size is the diameter of the thread base circle. Plastic materials, due to plastic deformation caused by material stress during tapping, will move towards the smaller diameter of the thread. Therefore, the bottom hole should be appropriately increased.

For threaded holes below M6, regardless of material properties, the basic size - pitch shall be uniformly used