RS PRO High Speed Steel Countersink Drill Bit 20.5 mm Head Diameter, 3 Flutes, 90° Angle, 43 mm Length 423-822

RS PRO 423-822 is a high speed steel countersink drill bit with a 20.5 mm head diameter, designed for professional and industrial use in mechanical, manufacturing, and maintenance applications. It provides a precise 90° countersink angle, making it ideal for preparing pilot holes to receive countersunk screws so they are flush with the surface.

Manufactured from durable high-speed steel, this tool offers excellent resistance to wear and high temperatures, ensuring longevity and reliability in tough working conditions. The bit features three flutes, which provide stable and accurate centering and help remove burrs and rough edges, improving the finish quality of the countersunk holes.

The shank diameter measures 7.15 mm with a length of 21.5 mm, designed for compatibility with common three-jaw chucks and drill machines. This single-piece countersink bit is suitable for use in various industrial and construction settings, including metalwork, woodworking, and general fabrication.

This RS PRO countersink drill bit meets international electrostatic discharge standards (ANSI/ESD S20.20:2014 and BS EN 61340-5-1:2007), minimizing the risk of damage during sensitive electrical component manufacturing or repair.

Made from high speed steel for durability and heat resistance. Three flutes provide excellent centering and efficient chip removal. 20.5 mm head diameter and 90° countersink angle for precise chamfering. Designed compatible with standard drill chucks via 7.15 mm hexagonal shank.

Suitable for removing burrs and smoothing rough edges. Ideal for mechanical, construction, manufacturing, and maintenance applications.

This product is made in China and is supplied as a single piece countersink drill bit. RS PRO is a trusted brand known for high-quality industrial tools and components. Browse the Power Tools and Drill Bit categories on EnvMart for related products and accessories.