Screw Fischer 670674 120 mm

Fischer 670674 120 mm screws are durable metal fasteners designed specifically for use in wood materials. Each screw is 120 mm long with a thread length of 70 mm and a 5 mm diameter, supplied in a pack of 50 to cover medium and large woodworking and construction projects. The screw geometry and material selection aim to provide reliable holding power and long-term joint stability in timber applications.

Advantages

The screws feature a long shank and extended thread length that enable deep engagement with wooden substrates, improving pull-out resistance and load distribution. Their 5 mm diameter balances shear strength with minimal splitting risk for pre-drilled or adequately prepared holes. Supplied in a 50-piece pack, they reduce the need for frequent reorders and are suitable for repeated professional or DIY use.

Suitable for

• Assembly and fastening of structural and non-structural wooden elements
• Furniture construction and repair
• Decking, fencing, and outdoor wooden fixtures when used with appropriate corrosion protection
• General carpentry and joinery tasks requiring long wood-to-wood connections

Key specifications

• Material: metal (steel)
• Overall length: 120 mm
• Thread length: 70 mm
• Nominal diameter: 5 mm
• Quantity in pack: 50 pieces
• Intended substrate: wood

How to use

Select an appropriate pilot hole diameter and depth based on wood type and screw diameter to reduce splitting and ensure correct bite. For hardwoods, drill a pilot hole to the full threaded length; for softwoods, a slightly smaller pilot hole may be sufficient. Drive the screw with a compatible screwdriver or power driver using the correct bit to avoid cam-out and head damage. For outdoor or treated timber use, apply suitable corrosion protection or select screws with appropriate coating before installation.

Recommendations

Pre-drill pilot holes for hardwoods and dense engineered woods. Use washers where increased bearing area is required and follow local building codes for structural applications. Store screws in a dry place to prevent surface corrosion prior to use.