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Makita Countersink Bit: Precision finishing for M6 fasteners

Makita D-37340 Countersink Bit
Makita D-37340 Countersink Bit
4.5
[12.4mm Countersink Diameter]  12.4 mm diameter delivers proper seating for standard M6 screw heads.
[1/4" C-Form Shank]  Standard 1/4" shank fits most drills and drivers for quick installation.
[Compact 35mm Length]  35 mm overall length enables precise depth control in confined spaces.
[Three Cutting Edges]  Triple-edge design provides smooth, burr-free countersinks and faster material removal.
[Single Pack Quantity]  Sold as a pack of 1, ideal for individual jobs or replacements.
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Home improvement countersink designed to create neat chamfers for M6 fasteners. Confidence when finishing joinery or light metalwork comes from reliable, accurate cuts. Is Makita Countersink Bit the right choice for workshop projects and occasional DIY?

⚡ At a Glance
  • Cutting Quality: Clean, chamfered finishes suited to M6 screws
  • Best for: DIY enthusiasts and tradespeople needing precise M6 countersinks
  • Not ideal for: Heavy industrial drilling or large-diameter countersinking tasks

Diameter 12.4mm with a 1/4" C form shank and 35mm length. Three cutting edges give consistent chamfers for M6 applications.


Neat Countersinks – thanks to 3 cutting edges

Three cutting edges remove material evenly around the hole, creating a uniform chamfer profile. Even cutting reduces burrs and helps match the head seating for M6 fasteners.

Consistent countersinks reduce the need for manual finishing and speed up assembly of M6 fixings.

Quick Tool Changes – with 1/4" C form shank

A 1/4" C form shank fits common chucks and many quick-change adapters used in drills and drivers. The shank form secures the bit for stable rotation during cutting.

Faster swaps between tools make short runs and small jobs more efficient on site or in the garage.

Compact Handling – with 35mm length and single-pack convenience

A 35mm overall length keeps the bit compact for use in confined or recessed areas and simplifies storage in tool kits. Pack quantity 1 supplies a single ready-to-use bit.

Easy to manoeuvre in tight spots and simple to keep with essential tools for occasional or light-duty tasks.

✨ The 4 Key Reasons for Makita Countersink Bit
  1. 3 cutting edges – Creates uniform chamfers matching M6 screw heads precisely
  2. Diameter 12.4mm – Sized to suit M6 countersink requirements with accurate seating
  3. Shank 1/4" C form – Compatible with common 1/4-inch chucks and quick-change holders
  4. Length 35mm – Short profile improves control in tight or recessed areas
📋 Technical Details at a Glance
  • Category: Home Improvement
  • Brand: Makita
  • Product ID: B00LBW2T46
  • Diameter: 12.4mm
  • Shank: 1/4" C form
❓ Frequently Asked Questions

Q: Is the bit suitable for M6 screws?

A: Yes. Application M6 is specified, so the bit is intended for countersinking M6 fasteners.

Q: What shank size and form does it use?

A: Shank 1/4" C form is specified, compatible with common 1/4-inch chucks and many quick-change holders.

Q: How many cutting edges does the bit have?

A: The description lists three cutting edges, which support even cutting and consistent chamfers.

🏆 Our Verdict

Suitable for DIY enthusiasts and tradespeople who need precise countersinks for M6 fasteners. The compact, single-pack design with three cutting edges, 12.4mm diameter and 1/4" C form shank focuses on reliable, repeatable finishing. A straightforward tool for light workshop use that delivers practical value over time.