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Hex Head Flange Bolts DIN6921

Short Description:

We have two sales market for hex flange bolts, GB5787,GB5789 is for domestic market, DIN6921 is for export market.
Our factory has several four station cold heading machines specializing in the production of flange screws

Product Detail

Product Tags

Flange Bolts Details

● Material:Middle carbon Steel 35k,45k, Alloy Steel 40Cr

● Size: M10-M36

● Grade: 8.8, 10.9, 12.9

● Surface treatment: Plain, Black, Zp Hot dip galvanizing, Dacromet, Teflon.

● Package: Small box, or 25kgs/carton, 36cartons/pallet

● Delivery: 30-60 days

Advantages: when raw materials come to the factory, we will test the composition of raw materials. During the production process, we will constantly spot check the external dimensions of screws. After heat treatment, we will check the mechanical properties. Before packaging, we will check the surface dimensions.


Flange Bolts Standard and Dimensions


Factory display

Ningbo Zhongli bolts manufacturing co.ltd
Ningbo Zhongli bolts manufacturing co.ltd

What are hex head flange bolt?

Hex head flange bolt is a kind of fastener composed of hexagonal head, flange (the gasket under the hexagon is fixed with the hexagon together) and screw (the cylinder with external thread).

What are hex head flange bolt made of?

Carbon Steel, most common seen carbon steel 10B21.

Where is the hex head flange bolt used?

Hex head flange bolts are widely used in highway and railway bridges, including industrial and civil buildings, cranes, excavators and other heavy machinery.

What are the grade properties of hex head flange bolt?

There are 8.8, 10.9, 12.9 and other performance grades of hex head flange bolts.  

How do you use a hex head flange bolt?

Turn the screw head with a wrench to tighten it.

What are bolts coated with?

Zinc Plated, Plain, Black, Hot Dip Galvanizing

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