RS PRO Plain Stainless Steel Hex Socket Countersunk Screw, ISO 10642, M4 x 20mm

RS Pro Countersunk Screws - Hex Head. Our popular hexagon socket countersunk screws are an excellent choice when you need a fastener to sit flush or below the surface of your material. These RS Pro A4 (316) stainless steel metric thread countersunk screws are designed for light duty applications where space is limited. These fasteners are used where a strong, reliable joint is required. They ensure an attractive, quality appearance and finish wherever they are used and give you exceptional resistance to corrosion. All models are highly reliable and excellent quality. Features and Benefits. Various thread sizes available, including M3 and M4 Great corrosion resistance Stainless steel Head height is equal to shank diameter More cost effective than titanium. Benefits of Stainless Steel. Stainless steel is useful for more than just a visual purposes. The main highlight would be the superior corrosion resistance, stopping unwanted issues like rusting. High heat resistance is also a big benefit, due to the way stainless steel is created, it can withstand an incredible amount of heat as opposed to screw or socket made from standard steel. The only possible issue may be cost, however a reliable and durable material will not only increase the longevity of the application, but also the sustainability. What are socket screws used for?. Although uses may very, as standard, these screws are fasteners for industrial equipment or machines which requires parts to be fixed onto a surface or together. The socket will need to be the same metric thread as the screw itself. As an example, some of the types of uses would be: Fasteners and fixings Machine tooling and repair Security guarding Electronic applications Automotive industry. What is a socket screw?. Socket screws are defined by their name. They are a type of threaded bolt which screws into the intended socket. There are various thread sizes and lengths and can be used for both industrial and personal purposes. A good quality and reliable RS Pro socket screw ensures the fixing will remain strong and stable, whatever the application. Standards. Threaded in accordance with DIN 7991