RS PRO Plain Steel Hex Socket Countersunk Screw M8 x 20 mm Hex Socket Head DIN 7991 Grade 10.9 Black Self-Colour 281-552

RS PRO 281-552 Plain Steel Hex Socket Countersunk Screw M8 x 20 mm is designed for fasteners that need to sit flush or below the surface of material, ensuring equipment panels and components are securely fixed. The screw features a black self-colour finish providing corrosion resistance and an attractive appearance wherever used. Manufactured from grade 10.9 high-strength steel, it is more resilient than standard grade 8.8 screws and is ideal for light-duty and space-limited applications.

The M8 metric thread, combined with a 20 mm length and hex socket countersunk head, enables precise installation in mechanical, industrial, and electronic assemblies. The drive type is a hex socket, allowing for quick tightening or removal using standard Allen keys. It complies with DIN 7991 standards for countersunk socket screws, confirming its suitability for robust professional and industrial environments.

Common uses include panel building, security guarding, machine tooling and repair, woodworking, fasteners and fixings, automotive assemblies, medical devices, and facilities maintenance. Its compact dimensions permit installation in tight spaces, while the flush-fitting countersunk head prevents interference with moving parts or surface operations.

The black oxide coating not only adds thickness and increases corrosion resistance but also enhances the durability of the steel material under harsh conditions. These fasteners are produced with clear head markings for traceability and quality assurance. Applications range from industrial and laboratory equipment to joinery and domestic construction.

Enjoy the technical quality and reliability that RS PRO brings to every fastener. Browse other RS PRO fasteners and Socket Screws for your mechanical, electrical, and industrial tool needs with EnvMart.