M8 x 1.25p Metric Coarse Combination HSS Drill & Tap Alpha - 1 Pack Carded DTMC080

About Combination Drill & Taps

Alpha M2 HSS Combination Drill & Tap bits cut the pilot hole AND the internal thread in a single drilling operation. One bit, one pass, one tapped hole - saves the setup time of drilling, swapping to a tap and tapping by hand. Ideal for sheet metal, HVAC ductwork, sign work, automotive panels, light fabrication and workshop jobs where speed matters and a separate drill + tap would risk stripping the thin material. Stocked in metric coarse (M3 x 0.50 through M6 x 1.00) and imperial UNC sizes.

Recommended use General steel, alloy, brass, aluminium and timber drilling. Most cost-effective option for everyday workshop and site work. Holds an edge for hundreds of holes in mild steel when used with cutting fluid.

Frequently Asked Questions

Material & Coating

HSS M2 high-speed steel (HSS). The everyday cutting-tool steel for drill bits. Hardness approximately 800 to 900 HV with an operating temperature range up to ~600 degrees C before the cutting edge anneals.

Important Use cutting fluid (light machine oil, kerosene or proper cutting compound) on steel and stainless to keep the cutting edge cool. Without fluid, temperature rises into the annealing range and the edge dulls quickly. Aluminium can be drilled dry; cast iron drills dry.

How to Measure

Length The size quoted is the overall length - measured end to end.

Sizing Combination Drill & Taps are sized by the thread they cut (M3 x 0.50, M4 x 0.70, M5 x 0.80, M6 x 1.00 metric; #6-32, #8-32, #10-24, 1/4-20 UNC imperial). The drill portion creates the correct pilot hole for the matching tap section in one operation - no separate drill + tap pass required. Use on sheet metal, thin steel and HVAC ductwork.

Still not sure? See our step-by-step identification guide for help measuring your fastener.

Resources

About the Brand

Alpha · Sheffield Group · Australian

Alpha is the Sheffield Group's premium drilling, cutting and fastening brand. Australian-owned, Sheffield has supplied industrial and trade markets since 1957 and is one of the country's largest distributors of cutting tools and accessories.

Range: The Alpha range covers Gold Series HSS jobber drill bits, HSS Cobalt drill bits, Bi-Metal Cobalt holesaws, TurboBORE spade bits, heavy-duty timber augers, SDS Plus masonry bits, countersinks, ONSITE+ impact-rated step-tip drill bits, and the ThunderMax range of impact-driven accessories.

Positioning: Premium-quality, production-grade tools at trade pricing. Same-day dispatch from BNA Brisbane.

Pricing & Delivery

Includes GST, a Tax Invoice and Free Standard Delivery anywhere in Australia.

Buy with Confidence

15+ years selling online · 25,000+ stock lines · 200 million pieces ex-stock in Brisbane QLD.

Disclaimer

Technical data Researched and compiled from numerous industry sources for the sole purpose of providing basic information. All material is advisory only and its use by anyone is entirely voluntary. Reliance on it for any purpose by anyone is at the sole risk of that person, and Bolt and Nut Australia is not responsible for any loss, claim or damages arising therefrom. In developing this information, Bolt and Nut Australia has made a determined effort to present it accurately.

Measurements Sizes are taken from supplier catalogues or hand-measured and should be used as a guide. Minor variation between batches is normal. We only stock Alpha for this product; substituting another brand is rare and would always be confirmed with you first.

Product Photos & PDF Data Sheets Represent the product type, not exact size. PDFs are a reference guide only. Specifications may change without notice.

If you see any problems with any of our specifications or you require additional information please contact us.