RS PRO M4 x 40mm Hex Socket Cap Screw Black, Self-Colour Steel

From RS Pro, a range of socket screws incorporating a narrow head, suitable for difficult and hard to reach areas. Machine repair and maintenance would be the most beneficial applications for these types of screws, especially if the sockets are situated between small or cramped crevices. Made with a high tensile steel, they are a perfect addition for environments where corrosion won't be an issue. All models are highly reliable and excellent quality.

• Various thread sizes available, including M3 and M4
• High-quality threaded design, ensuring the screws turn effortlessly into the socket
• 12.9 grace black high tensile steel as standard
• Head height is equal to shank diameter
• More cost effective than stainless steel

Socket screws are a type of threaded bolt which screws into the intended socket. There are various thread sizes and lengths and are used for both industrial and personal purposes. Due to the high tensile strength of the steel used, applications which are worry free of corrosion, will continue to secure parts together for a number of years. A reliable RS Pro socket screw ensures the fixing will remain strong and stable, whatever the application.

The types of uses for these screws can vary, especially as the sockets for applications can be for both difficult and easy to reach areas. As an example, some of the different uses would be:

• Fasteners and fixings
• Machine tooling and repair
• Security guarding
• Electronic applications
• Automotive industry

As standard, this entire range comes with hexagon cap heads built onto the screws. Meaning a hexagon key/Allen key will need to be used to fully secure the screws into their corresponding sockets. Please make note of the thread sizes of screws you are using as the sockets will need to have identical metric threads to be fixed.