M5 x 50mm Coach Screw A2 Stainless Steel DIN 571

Corrosion Resistant Coach Screws

A2 stainless steel coach screw, M5 x 50mm, with a thick cylindrical thread and hex head to ensure a firm hold when used with wood.

Manufactured in A2 stainless steel that offers a high level of resistance to corrosion. A versatile screw that can be used for internal and external applications due to the corrosion resistant properties.

Utilising a thick thread with good pull-out resistance and a hex head that allows installation with an array of conventional tools. Used across many sectors, the M5 x 50mm coach screw is a popular choice with professionals and DIY enthusiasts alike.

Coach screw specification:

• Thread Diameter (TD): M5 - 5mm
• Length (L): 50mm
• Thread Length (TL): 30mm
  
• Head Width (H): 8mm
• Conformity: DIN 571 Standards
• Material: A2 Stainless Steel

Part of a growing range of stainless steel coach screws available from Fusion Fixings. 

FAQs about stainless steel 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

Yes, these stainless-steel coach screws can be used outside as they have a high resistance to corrosion. For harsher areas like saltwater environments, A4 stainless steel coach screws are advised as they offer the highest corrosion resistance.

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.