M3/M5/M8/M16 Grade 12.9 Carbon Steel Pointed Tip Set Screws Black Hex Socket Machine Rice Stop Screws for Machinery Positioning

Grade 12.9 Carbon Steel Pointed Tip Set Screws (Black Hex Socket Machine Rice Stop Screws) are professional high-strength positioning fasteners, precision-manufactured from premium grade 12.9 carbon steel with a black finish, engineered to deliver exceptional tensile strength, wear resistance, and reliable positioning performance for industrial machinery, mechanical equipment, and precision assembly applications. Designed as pointed tip set screws with an inner hexagon (hex socket) head, they are specifically crafted for stopping, positioning, and locking moving components—such as shafts, gears, and pulleys—ensuring stable and secure operation.

 

Crafted to meet grade 12.9 standards, these carbon steel set screws offer superior hardness and load-bearing capacity, making them ideal for high-stress industrial and mechanical applications where precision positioning and anti-loosening performance are critical. The black finish enhances corrosion resistance, protecting against rust, wear, and harsh working environments, while also providing a sleek, professional appearance that integrates seamlessly with industrial equipment.

 

The pointed tip design allows for precise contact and firm locking onto shafts, gears, or other components, preventing slippage and ensuring accurate positioning. The inner hexagon (hex socket) head enables easy, precise tightening with standard hex keys, even in tight or hard-to-reach spaces, minimizing slippage and ensuring optimal torque transmission for a secure fit. As machine rice stop screws, they are engineered to fit seamlessly into mechanical assemblies, providing a low-profile, non-intrusive locking solution that does not interfere with moving parts.

 

Available in M3, M5, M8, and M16 sizes, these grade 12.9 carbon steel pointed set screws are versatile for a wide range of industrial and mechanical applications. They are perfect for machinery positioning, equipment fixing, shaft and gear locking, and precision mechanical assembly—suitable for professionals, engineers, mechanics, and industrial workers. Combining high strength, precision, and durability, these set screws deliver consistent, reliable performance to meet the demands of even the most rigorous industrial tasks.