RS PRO Black Steel Hex Socket Cap Screw M4 x 8 mm ISO 7380 Grade 10.9 281-215

RS PRO 281-215 Black Steel Hex Socket Cap Screw, M4 x 8 mm, is a high-strength fastener designed for secure and precise assemblies in industrial environments. Manufactured to ISO 7380 specifications, this hex socket button head screw delivers reliable performance for diverse applications including machine construction, electronic enclosures, tooling, and security guard installations.

This fastener features a button-shaped, low-profile head with a hex socket drive, allowing for installation and removal using a standard Allen key. Fabricated from Grade 10.9 black steel, it provides high tensile strength, mechanical resilience, and excellent wear resistance, meeting the demands of repeated industrial use. The black finish offers added corrosion resistance and an attractive, professional appearance, especially in exposed or visible installations.

With a metric M4 thread and 8 mm length, this screw fits standard sockets and tapped holes in mechanical subassemblies, panels, and machine frames. Its wider bearing surface minimizes deformation and ensures even load distribution. The cap head design is especially suited to locations with limited space above the fastener where flush or semi-flush installation is required.

RS PRO's engineering compliance with ISO 7380 means the cap screw adheres to internationally recognized performance and fit requirements. The Grade 10.9 classification guarantees strong, secure fastening even in high-vibration settings such as automation equipment, electrical junction boxes, and automotive bodywork.

This versatile fastener is ideal for use in general manufacturing lines, machine repairs, commercial electronics, security guards, and domestic repair projects. The button head design helps prevent snagging, offers an appealing finish, and increases operator safety compared to protruding bolt alternatives. Installation using a hex key is quick and reduces the chance of cam-out or head-strip commonly seen with slotted or Phillips drivers.

Applications include industrial assemblies, precision machine builds, panel mounting, automotive repairs, electronic device assembly, and custom security fixings. The product is commonly used wherever a strong, neat, and tamper-resistant fastener is essential.

Explore a range of high-quality fasteners, screws, and machine hardware within the Hex Socket Cap Screw category and discover additional RS PRO products on EnvMart for your industrial and engineering requirements.