M6 x 90mm Hex Head Coach Screw BZP DIN 571

Heavy Duty Woodscrews

M6 coach screw x 90mm with a hex head and coarse thread for a firm hold when used with wood. A heavy-duty wood screw with bright zinc plating (BZP) that offers a mid-level of corrosion resistance.

Using a coarse thread for great hold and pull-out resistance, along with a hex head that allows installation with a range of conventional tools. A combination that sees the M6 coach screw widely used in many sectors.

M6 coach screw specification:

• Thread Diameter (TD): M6- 6mm
• Length (L): 90mm
• Thread Length (TL): 54mm
  
• Head Width (H): 10mm
• Conformity: DIN 571 Standards
• Material: Bright zinc plated steel (BZP)

The M6 coach screw is part of a larger range of M6 coach screws specifically designed for use with wood and available at competitive prices. 

FAQs about coach screws

What are hex head coach screws used for?

Hex head coach screws are heavy-duty screws designed for securing timber to timber, or timber to metal. The heavy-duty nature of the coach screw sees them commonly used in decking, fencing, roofing, and heavy joinery applications. The hexagonal head allows for higher torque using a spanner or socket for a firm, reliable hold.

How are coach screws different from coach bolts?

A coach screw had a pointed tip more like traditional screws and threads directly into wood without a nut. A coach bolt (also called a carriage bolt) has a flat tip, is used with a pre-drilled hole, and passes through the material being secured on the other side with a nut.

Can I use coach screws outside

The bright zinc plating (BZP) of these Coach Screws offers a general resistance to corrosion and isn’t suitable for long term external use.

For external use, A2 stainless steel is recommended for long term use, with A4 stainless steel offering a highest level of corrosion resistance, included the use in salt water environments.

Do I need to drill a pilot hole first?

Yes, with the heavy-duty nature of the coach screw, always pre-drill a pilot hole before installation.

Should I use a washer under the head?

It’s good practice to use a flat washer beneath the hex head as this spreads the load across a wider area and protects the timber surface.

Which material should I choose - BZP, A2, or A4 stainless steel?

The coach screws at Fusion Fixings are available in 3 material types which cover a larger range of applications.
•    BZP (Bright Zinc Plated): Ideal for indoor use or dry conditions.
•    A2 Stainless Steel: Great for outdoor projects such as fences or decking.
•    A4 Stainless Steel: Marine-grade corrosion resistance and the best choice for coastal or highly corrosive environments.

Can I use coach screws in brick, block, or concrete?

Coach screws are primarily for timber; however, they can be used in masonry for certain applications if combined with a suitable wall plug or anchor.

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