Self-drilling screw Koelner/Rawlplug R-SL3-OD48055T 4.8x55 mm zinc-plated, pack 100

Self-drilling screw Koelner/Rawlplug R-SL3-OD48055T 4.8x55 mm zinc-plated, pack 100 is a fastener engineered for metal-to-metal and metal-to-thin-sheet connections. The screw features an integrated drill point that eliminates the need for pre-drilling in many applications, reducing installation time while ensuring consistent thread engagement. Supplied in a practical pack of 100, this zinc-plated fastener provides basic corrosion resistance suitable for indoor and covered outdoor environments where moderate protection is required.

Advantages

The integrated drill point allows direct fastening into thin steel and sheet materials without separate drilling, which speeds up repetitive assembly and installation tasks. Thread form and shank length are balanced for reliable pull-out resistance and good clamp force. Zinc plating offers a layer of corrosion protection and a uniform finish that is commonly accepted for construction and roofing components. The pack quantity of 100 supports small-to-medium projects and helps maintain consistent inventory on-site.

Suitable for

• Fastening light-gauge steel to steel and sheet metal assemblies
• Roofing and cladding installation where self-drilling screws are required
• Metal framing, HVAC ducts, and general sheet metal work

When it may not be suitable

This screw is intended for thin to moderate thickness steel and sheet applications; it may not be suitable for very thick structural steel or high-strength materials where specialist bolts or welding are required. Zinc plating provides moderate corrosion resistance but is not sufficient for prolonged exposure to marine or highly corrosive environments without additional protective coatings or stainless steel alternatives.

Key specifications

• Diameter: 4.8 mm
• Length: 55 mm
• Finish: zinc-plated
• Point type: integrated self-drilling tip
• Pack quantity: 100 pieces

How to use

Select an appropriate driver bit that matches the screw head profile and set the drill/driver to a controlled speed. Position the screw perpendicular to the workpieces and apply steady pressure while driving; the self-drilling tip will form the hole and thread the material. Use pilot or backing support as needed to prevent material deformation on thin sheets. For consistent results, check torque settings to avoid over-tightening which can strip threads or compress sheets excessively.

What to consider before purchase

• Material thickness and type of substrates to ensure self-drilling capability
• Required level of corrosion resistance for the installation environment
• Correct driver bit and compatible power tool torque settings

Usage recommendations

For best performance use at moderate drill speeds and apply consistent axial pressure. In outdoor or humid locations consider additional protective coatings or choose a stainless steel fastener when higher corrosion resistance is needed.