Gr12.9 Black Hexagon Socket Set Screw with Cup Point

The Gr12.9 Black Hexagon Socket Set Screw with Cup Point is a high-strength fastener specifically designed for axial positioning of shaft-type components. Manufactured from high-quality medium carbon alloy steel, it undergoes precise quenching and tempering heat treatment to achieve the ultra-high mechanical performance of grade 12.9, with a black oxide surface finish. Its unique cup point (conical indentation) design generates high localized pressure, creating a reliable anti-loosening connection between shafts and hubs, making it particularly suitable for securing rotating components that need to transmit high torque. This screw is widely used in demanding industrial applications such as mechanical equipment, mold manufacturing, and automotive transmission systems.

The Gr12.9 Black Hexagon Socket Set Screw with Cup Point is manufactured from high-strength medium carbon alloy steel, with outstanding shear and vibration resistance. Its unique cup point (conical indentation) design creates a uniform high-stress zone on the installation surface, providing precise and reliable axial positioning and anti-loosening fixation. The hexagon socket drive enables high-torque installation without slippage damage, while the black oxide surface finish offers both corrosion protection and an aesthetic appearance. With high dimensional accuracy, it is suitable for long-term stable use in high-load, high-vibration environments, making it the preferred fastening solution for critical connection points in industrial equipment.

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

The Gr12.9 Black Hexagon Socket Set Screw with Cup Point is primarily used for precise axial positioning in mechanical transmission components. In the machine tool industry, it secures axial positioning for precision transmission parts like spindles and ball screws. In automotive manufacturing, it positions critical components such as transmission gears and drive shafts. In mold manufacturing, it fixes mold parts like guide pillars and punches. In wind power equipment, it locates axial positioning in fan transmission systems. In heavy machinery, it provides anti-loosening fixation for shaft transmission components. It is especially suitable for heavy-duty applications involving high rotational speeds and high torque transmission.

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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.