Parafuso Fischer 670170 40 mm

Fischer 670170 40 mm screws are zinc-plated wood screws designed for general woodworking and assembly tasks. Each screw measures 40 mm in length with a 4 mm diameter and a 28 mm threaded section, supplied in a pack of 200 pieces to support medium and larger projects where multiple fasteners are required.

Advantages

These zinc-coated screws offer corrosion resistance suitable for indoor environments and reduce the risk of rust during storage and use. The defined thread length of 28 mm balances gripping power in wood with efficient driving, while the 4 mm diameter provides sufficient shear and tensile strength for typical carpentry and joinery applications. Supplied in bulk, the pack supports consistent work flow and reduces the need for frequent replenishment.

Suitable for

• Furniture assembly and repair
• Wooden frame construction
• Interior wood fixtures and trim
• DIY woodworking projects

Key specifications

• Length: 40 mm
• Diameter: 4 mm
• Thread length: 28 mm
• Material/coating: zinc-plated steel
• Quantity per pack: 200 pieces

How to use

Select an appropriate pilot hole size for the 4 mm diameter screw when working with hardwoods or dense materials to prevent splitting; for softer woods a pilot hole may be optional. Use a compatible screwdriver bit or power driver set to a moderate torque to drive the screw until the head is flush or slightly countersunk with the wood surface. Ensure correct alignment of joined parts and apply steady pressure while driving to maintain thread engagement and prevent cam-out.

Recommendations

For outdoor or high-moisture applications consider using stainless steel or specially coated fasteners; for indoor woodwork these zinc-plated screws provide acceptable corrosion resistance. Store in a dry place to preserve the coating, and match screw length and diameter to material thickness and load requirements for secure joints.