RUKO FLS-DIN373-HSS-TiN-M12x Countersink Bit, DIN 373, HSS, TiN Coated, 12.5 mm Pilot, 20.0 mm Head, 10.0 mm Shank, 67 mm Overall Length

Creating clean, burr-free countersinks for M12 cylindrical head screws can be a challenge, especially in tough materials. The RUKO FLS-DIN373-HSS-TiN-M12x countersink bit solves this problem with precision-ground cutting edges and a wear-resistant titanium nitride coating. It delivers consistent, chatter-free countersinks in steel, cast iron, non-ferrous metals, and plastics, making it a reliable choice for metalworking and machining applications.

Who is it for

This countersink bit is intended for machinists, metalworkers, and maintenance professionals who need to create precise countersinks for socket head cap screws and similar cylindrical head fasteners. It is suitable for use in drill presses, milling machines, and CNC equipment where accurate hole preparation is critical.

Main features

• Conforms to DIN 373 standard for countersinks for cylindrical head screws
• Manufactured from high-speed steel (HSS) for durability and heat resistance
• Titanium nitride (TiN) coating reduces friction and extends tool life
• Three cutting edges provide smooth, vibration-free cutting action
• Right-hand cutting direction for standard rotation
• Cylindrical shank with 10.0 mm diameter for secure chucking

Specifications

• Tool type: Countersink bit
• Standard: DIN 373
• Material: High-speed steel (HSS)
• Coating: Titanium nitride (TiN)
• For screw size: M12
• Number of cutting edges: 3
• Pilot diameter (d1): 12.5 mm
• Head diameter (d2): 20.0 mm
• Shank diameter (d3): 10.0 mm
• Overall length (l1): 67 mm
• Shank type: Cylindrical
• Cutting direction: Right-hand cutting
• Manufacturing process: Ground
• Suitable materials: Steel, cast iron, non-ferrous metals, plastics

Tips

Use a suitable cutting fluid when countersinking steel or cast iron to improve surface finish and extend tool life. Ensure the workpiece is securely clamped to prevent movement during operation. For best results, run the bit at the recommended speed for the material being machined.