Screw Fischer 670438 40 mm

Fischer 670438 40 mm screws are metal fasteners engineered for wood applications. Each screw has a total length of 40 mm, a nominal thread diameter of 5 mm and a thread length of 34 mm. Supplied in a pack of 100, these screws are intended for general wood-to-wood joining, furniture assembly and other carpentry tasks where a reliable mechanical connection is required.

Advantages

These screws combine a robust metal construction with a medium-length thread profile to provide secure grip in common wood types. The 5 mm diameter balances shear strength and ease of driving, while the 34 mm thread length ensures good embedment into the receiving workpiece. Pack of 100 offers an economical supply for multiple assembly points and small-to-medium sized projects.

Suitable for

• Wood-to-wood joints in construction and carpentry
• Furniture assembly and repair
• DIY projects and hobby woodworking
• Interior fixtures and fittings where metal wood screws are required

Key specifications

• Material: metal (steel)
• Total length: 40 mm
• Thread diameter: 5 mm
• Thread length: 34 mm
• Head type: standard countersunk or pan head depending on application (verify visually)
• Pack quantity: 100 pieces

How to use

Select an appropriate drill pilot hole size for the wood type and the 5 mm thread diameter to reduce splitting and facilitate driving. Position the screw at the joint, hold it steady and drive it using a compatible screwdriver or a powered driver with the correct bit. For a flush finish, use a countersink before driving if the head type requires it. Ensure secure alignment of parts before final tightening to avoid over-torquing and material damage.

Usage recommendations

For best results, pre-drill pilot holes in hardwoods and engineered wood products. Use corrosion-resistant finishes or coatings when installing in humid or treated wood environments. Store the pack in a dry place to prevent surface oxidation.