Flange screws are a class of fasteners composed of hexagonal head and flange plate (the gasket under the hexagonal head is fixed with the hexagonal head) and screw rod (cylinder with external thread), which shall be matched with nuts for fastening two parts with through holes.
Classification of Flange bolts:
1, hexagonal flange type: hexagonal head has two kinds, one is flat brain, the other is concave brain.
2. Surface color category: according to different needs, the surface is plated white, military green, colorful yellow, and never rust Dacromet.
3, flange type: according to the use of flange bolts in different places, the size of the plate requirements are different, there are flat bottom and with teeth, teeth play a non-slip role.
4, according to the connection of the force mode, there are ordinary and hinged hole used. Hinged hole flange bolts to match the size of the hole, used in the transverse force.
In addition, in order to meet the need of locking after installation, there are holes in the rod part, which can prevent the bolt from loosening when subjected to vibration.
Some flange bolts have unthreaded smooth rod to be fine, called fine rod flange bolts. This type of flange bolts is conducive to variable force coupling.
There are special high-strength bolts on the steel structure. The head will be enlarged. The size also changes.
Note: commonly used national label number on the market, GB5789, GB5787

The products are generally made of carbon steel/stainless steel, and the surface treatment of carbon steel after molding is generally galvanized/zinc-Nickel alloy and other colors.

Dongguan Tiansheng Co., LTD has been specialized in developing and producing non-standard fasteners for 12 years.
 

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