The processing technology of blackened hexagon bolt is divided into three kinds: low temperature blackening, high temperature blackening and optical extinction blackening. 1. Low temperature blackening The product quality of low temperature blackening process of hexagon bolt is better than that of the same industry, the blackening film of the processed workpiece is firm, the [...]
The identification methods of high strength bolt are mainly seen in five aspects: 1. Look at the mark. Generally, there is a mark on the packing box of the bolt. It can be divided into three levels: 8.8, 10.9 and 12.9. Generally, there is no grade mark on the hexagonal plane of hexagon bolt, which [...]
There are many parts of machinery and equipment that use inner hexagon bolts to fix parts. However, because they are often disassembled, the inner hexagon of the bolts is easy to grind round, and it is difficult to remove them with the hexagon wrench. This paper introduces two methods of hexagonal nut hexagon bolt parts, [...]
Dacromet is an advanced and complete metal surface treatment technology of dacromet hexagon bolts. It has the advantages and characteristics that other surface treatment can't match. 1. Excellent corrosion resistance. In salt spray test, 1 μ m ~ 3 μ m thick rainbow colored film will be corroded in 10 hours and corroded in 200 [...]