Self-tapping screw Koelner/Rawlplug 3.5x20 mm stainless steel, pack 22 pcs (16 blisters)

Self-tapping screw Koelner/Rawlplug 3.5x20 mm in stainless steel is a compact fastener designed for corrosion-resistant joining of thin materials. The 3.5 x 20 mm size provides a balance between grip length and low-profile head, making these screws suitable for a variety of light- to medium-duty fastening tasks. The pack contains 22 screws supplied in 16 blisters for convenient storage and controlled dispensing on the job.

Advantages

Made from stainless steel to resist rust and corrosion, these self-tapping screws maintain mechanical integrity in indoor and outdoor environments. Their self-tapping thread eliminates the need for pre-tapped holes in many materials, speeding up assembly and repair work. The small 3.5 mm diameter reduces splitting risk in thin woods and plastics while the 20 mm length offers sufficient penetration for secure joins without excessive protrusion.

Suitable for

• Fastening thin metal sheets and light-gauge steel components
• Joining wood panels, trims and molding in furniture or interior works
• Mounting plastic parts, housings and cable clips
• General assembly, repair and installation tasks requiring corrosion-resistant fasteners

Key specifications

• Material: stainless steel (corrosion-resistant)
• Diameter: 3.5 mm
• Length: 20 mm
• Head/profile: self-tapping screw geometry suitable for cutting threads into base material
• Quantity per pack: 22 screws supplied in 16 blister packs

How to use

Select an appropriate screwdriver or driver bit that matches the screw head. For harder base materials, consider drilling a pilot hole slightly smaller than the screw core diameter to reduce insertion torque and prevent material stress. Insert the screw perpendicular to the surface and drive at moderate speed until the head is flush or reaches the required seating depth. Avoid overtightening to prevent stripping the formed thread or damaging the workpiece.

Usage recommendations

Use these stainless steel self-tapping screws in applications where corrosion resistance is important, such as damp indoor areas or outdoor fixtures; store blister packs in a dry place and keep spare blisters for future maintenance needs.