Din6921 Hex Flange Serrated Cap Bolts For Machine

Din6921 Hex Flange Serrated Cap Bolts For Machine

Hex cap serrated flange bolts feature a built in washer under the bolt head that helps to distribute the clamping load over a larger area. This "one-piece" design eliminates the need of a separate washer under the bolt head and is preferable for some applications as it can be more efficient and easier to use. A washer is still needed on the nut side unless using stainless steel flange bolts. The serrations under the hex cap serrated flange bolts bite into the surface and help to resist loosening due to vibration.

Basic Introduction About Hyunto Nut
Wenzhou Hyunto Automobile parts Co.,Ltd is a professional and large scale company specializing in the production of all kinds of products including fasteners,Bolt Parts,turning parts and non-standard parts. 
As an OEM, HYUNTO are able to produce CUSTOMIZED Nuts under different standard(DIN, ANSI, GB, JIS, BSW, EN etc), by various materials(carbon steel, alloy steel etc) .

A summary of the production process:

1.Wire - Uncoiled, straightened and cut to length.

2.Cold forging - Molding the steel into the right shape at room temperature.

3.Bolt head - Progressively formed by forcing the steel into various dies at high pressure.

4.Threading - Threads are formed by rolling or cutting.

5.Heat treatment - The bolt is exposed to extreme heat to harden steel.

6.Surface treatment - It depends on the application. Zinc-plating is common to increase corrosion resistance.

7.Packing/stocking - After quality control to ensure uniformity and consistency, the bolts are packaged.

A summary of the production Testing