Flange Bolts

The entire production process of the Flange Bolts follows standard industrial processing steps, without any additional complex treatments. The focus is on stable performance and consistent dimensions to meet the requirements of daily use.

（1）Raw materials

Raw materials are picked from qualified steel suppliers, checked for chemical composition before production to avoid material defects that affect later use. Cold forging is used to shape the main body and integrated flange, which makes the internal structure denser than regular cutting processing, reducing the risk of cracks or breaks under normal working load.

（2）Flange section

The flange part is formed in one step without secondary welding, so there’s no weak joint between the shank and flange, ensuring even stress distribution when tightened.

（3）Thread processing

Thread processing adopts rolling technology instead of cutting, which strengthens the thread surface hardness and wear resistance, and the thread surface is smoother with no burrs, making installation easier and avoiding thread damage during matching with nuts. After forming and threading, parts go through proper heat treatment to adjust hardness and toughness, strictly controlled within standard ranges, not too hard to be brittle or too soft to deform.

Each batch goes through simple but effective size testing, checking flange diameter, thread pitch and total length, keeping tolerance within industry norms. Surface treatment is done evenly, no uneven coating or missing spots, and the whole process ensures stable quality for bulk orders, with little difference between single pieces.

Q&A session

What is the minimum order quantity for this Flange Bolts?

The MOQ is set based on standard production batches, with a basic starting quantity for regular sizes and materials. We can adjust small-batch orders for trial purchases appropriately, while bulk orders get better unit pricing. We also support mixed container orders for different sizes to meet your trial and stocking needs. Flange Bolts are produced in standardized batches to ensure stable supply and cost efficiency for all buyers.  

Product mechanical performance parameters

This type of flange bolts has clear tensile strength standards（The commonly used grades are 4.8 and 5.6, corresponding to the minimum tensile strengths of 400 MPa and 500 MPa respectively.）, and it meets common industrial grade requirements for stable load bearing. Within the rated range, it can bear direct pulling force without obvious deformation, so it won’t break during normal installation and daily use. The tensile data is tested under unified conditions, and users can check the marked values directly to match equipment and construction scenes.After heat treatment, hardness is controlled within a fixed range, so the product won’t be too brittle or too soft. It resists surface dents when clamped tightly, and it doesn’t wear out fast even if you take it apart and put it back together often. Hardness values stay stable between batches, so there’s no big difference between single pieces in large projects.This fastener has reliable anti-slip performance under lateral force, thanks to its special contact surface design. Clamping force spreads evenly, which lowers the risk of shifting or loosening from vibration or small movements. It doesn’t need extra parts to keep this performance, and the connection stays stable for a long time without frequent retightening.Fatigue resistance is tested with repeated stress cycles, and performance declines slowly over time. It works well for equipment that runs on and off or has regular vibration, avoiding fatigue cracks after long-term use. All mechanical parameters are printed clearly on the product label, making it easy for users to check and pick the right specs for actual working conditions.