What is this counterbore used for?

This tool is designed according to DIN 1866 for 90° countersinking of core holes for M8 threads with a fine fit.

What are the pilot and countersink dimensions?

The small pilot diameter is 6.8 mm and the large countersink diameter is 15 mm.

What shank type does this tool have?

The tool features a straight cylindrical shank with a diameter of 12.5 mm.

What is the benefit of the HSS-E Co material?

The cobalt-alloyed high-speed steel (HSS-E) provides high heat resistance and extended tool life during heavy machining.

PHANTOM 432400800 HSS-E head countersink drill bit DIN 1866 90°' fine fit' core holes M8 6'8x15mm

Name: PHANTOM 432400800 HSS-E head countersink drill bit DIN 1866 90°' fine fit' core holes M8 6'8x15mm
Brand: PHANTOM
SKU: 51252660
Price: 57.97 EUR
Availability: PreOrder

Supplier number: PHANTOM 432400800 | EAN 8716563361657

57.97 tax incl.

€47.91 excl. VAT (incl. all environmental contributions)

On order: delivered from 12/10/2026

Ordered before 20:00 - delivered as of 12/10/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL

✆ Talk to a specialist

Accurate counterbores for M8 fasteners

Practical benefits

Clean and precise chamfering: You produce exact 90° recesses for M8 screws thanks to the integrated fixed pilot pin.
Robust Phantom cobalt build: The tough HSS-E cobalt steel retains its cutting edge during demanding metalworking applications.
Stable cylindrical shank mount: With the 12.5 mm cylindrical shank, you achieve secure, low-vibration clamping in your drill chuck.

In a nutshell

The right choise for

With the Phantom 43.240 counterbore, you produce clean, burr-free 90° countersinks for M8 screw connections. The integrated 6.8 mm pilot pin ensures precise concentric alignment in the pre-drilled core hole, allowing the 15 mm cutting head to create an accurate seat. Made from cobalt-alloyed hss-e high-speed steel, it resists heat buildup and retains its cutting edge during heavy metalworking tasks. Thanks to the 12.5 mm cylindrical shank, you achieve secure, low-vibration clamping in drill presses and machining centres.

Product information FAQ

€57.97

tax incl.

Key features according to our expert

Countersink angle: 90 °
Small diameter: 6,8 mm
For thread designation: M8
Shank size: 12,5 mm
Shank type: Cylindrical
Large diameter: 15 mm

Product Description:

Phantom HSS-E Counterbore DIN 1866 90° fine tolerances core holes
DIN 1866, straight shank, fine tolerances for core holes (the pre-drill diameter for M thread cutting)

All Features

Countersink angle: 90 °
Small diameter: 6,8 mm
For thread designation: M8
Shank size: 12,5 mm
Shank type: Cylindrical
Large diameter: 15 mm
Variant: fine tolerances;core holes
Total length (l1): 100 mm
Tool material: HSS-E
Diameter ø (d1): 15 mm
Diameter ø (d3): 6,8 mm
Shank ø (d2): 12,5 mm
Surface: Bright
Standard: DIN 1866
Size thread (m): 8

Brand PHANTOM
51252660
EAN 8716563361657
Supplier number PHANTOM 432400800

Frequently asked questions about this product

Answered by specialists

What is this counterbore used for?: This tool is designed according to DIN 1866 for 90° countersinking of core holes for M8 threads with a fine fit.
What are the pilot and countersink dimensions?: The small pilot diameter is 6.8 mm and the large countersink diameter is 15 mm.
What shank type does this tool have?: The tool features a straight cylindrical shank with a diameter of 12.5 mm.
What is the benefit of the HSS-E Co material?: The cobalt-alloyed high-speed steel (HSS-E) provides high heat resistance and extended tool life during heavy machining.