Dormer G136 HSS Countersink 90° Straight Shank 16.5mm

This 90° countersink drill bit is designed for creating conical seats for countersunk screws. Made from high-speed steel (HSS) and finished in bright polish, it features a cylindrical shank and a pointed tip suitable for drilling through steel, aluminum, copper, and plastics. The bit conforms to DIN 335 C standards and is available in multiple sizes to accommodate different screw diameters. It can be used in both machine and hand-held applications with standard drill chucks for HSS tools. The design provides a tapered conical seating surface for precise countersinking, enabling clean and consistent results across various materials and thicknesses. It is suitable for producing standard 90-degree countersinks and can also serve as a deburring tool in some setups. The compact head length and adjustable shank length across sizes help accommodate different tooling configurations.

Features

• 90° countersink for standard screw heads
• Premium HSS with bright finish
• DIN 335 C compliant; straight shank design
• Compatible with standard drill chucks and drills
• Size range 6.3–25 mm maximum diameter; minimum varies

Specifications

• Material: High-Speed Steel (HSS)
• Standard: DIN 335 C
• Angle: 90°
• Cutting direction: Right-handed
• Surface finish: Bright
• Shank length: 45–67 mm