RS PRO Black Steel Hex Socket Countersunk Screw M8 x 40 mm 10.9 Grade Steel 822-9149

RS PRO 822-9149 Hex Socket Countersunk Screw M8 x 40 mm is a premium black steel fastener designed for reliable performance in mechanical and light industrial environments. This socket screw features a hex socket countersunk head, allowing it to sit flush or below the surface of the material, making it ideal for applications where a smooth finish is required.

Crafted from 10.9 grade steel, these screws provide a tensile strength of 1220 N/mm² and yield strength of 1100 N/mm², ensuring durability and resistance to mechanical stress. The black finish enhances corrosion resistance and adds a professional appearance to the assembly.

This metric thread M8 x 40 mm screw meets DIN 7991 standards for quality and consistency. It is commonly used in machine tooling setups, security guarding assemblies, and panel building where lightweight fasteners with a neat finish are necessary.

The hex drive type requires a compatible hex key tool for tightening or removal. These screws come marked on the head for easy identification and quality assurance. RS PRO offers a wide range of similar hexagon socket countersunk screws with varied finishes and grades including 12.9 grade and stainless steel alternatives for different industrial needs.

The screw head is marked for traceability and quality. The 10.9 grade steel provides high mechanical strength. Black finish ensures corrosion resistance and aesthetics. Meets DIN 7991 metric thread standards. Suitable for industrial, machine tooling, and panel building uses.

Requires a hex key for installation and removal.

This product is ideal for users requiring reliable and quality fasteners for assembly in industrial tools, machinery manufacturing, and general maintenance contexts. Explore the RS PRO category on EnvMart for more Socket Screws, hex bolts, and other mechanical fastening solutions.