BLACK Flat Countersunk Head Square Neck Bolts with Short Square

Jinghong's Carbon Steel Black Square Neck Bolt (DIN 608) is a high-strength fastener designed for applications requiring anti-loosening and stable connections. Its unique square neck effectively prevents rotation during installation, ensuring a more convenient and reliable fastening process. The bolt undergoes black oxidation surface treatment, enhancing both corrosion resistance and appearance.

This DIN 608 carbon steel black square neck bolt lies in its integrated square neck design. During installation, the square neck can be precisely fitted into pre-set holes, slots, or component edges, fundamentally preventing the bolt from rotating during tightening. This significantly simplifies one-person installation and ensures reliable connections. Made from high-strength carbon steel, it offers excellent mechanical performance and load-bearing capacity. The black oxide surface treatment provides basic corrosion resistance while creating a uniform, elegant matte appearance.

Our Strength

·  Direct from manufacturer to customer, On time delivery

·  Completely fastener products,offers one - stop shopping service.

·  High quality and competitive price, saving your cost.

·  Product complies with iso9001 and ts16949 certification

·  After shippment, we will offer the Material report and Test report.

Product Application

Leveraging its excellent anti-vibration and anti-rotation properties, this product is widely used in industrial fields that require high standards of connection reliability. It is primarily applied in the structural assembly of heavy machinery and equipment, beam-column connections in steel construction, railway sleeper and fastening systems, as well as various outdoor engineering facilities that need to withstand dynamic loads.

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Q: Are you trading company or manufacturer ?

A: We are factory

Q: How long is your delivery time?

A: Generally it is 2-5 days if the goods are in stock. or it takes around 20 days if the goods are not in stock, certainly,it is according to your quantity.

Q: Do u do Non-standard Fasteners,and How about the OEM/ODM?

A:Yes,we do Non-standard Fasteners,OEM/ODM as well,and we have 20 years more experience in this line.We have complete production line, R&D Center. Pre-sales and after-sales support. Let u no worries about the quality.

Q: Do you provide samples ? is it free or extra ?

A: Yes, we could offer the sample for free,but u need charge the freight at the first time.

Q:Do you sell little quantity,like few hundred and few thousand?

A: It depends on the stock. if we have ,that's ok. if not,it needs MOQ.