Self Drilling Screw
A roofing screw is a heavy-duty fastener used to attach metal roof sheets, deck sheets, and wall cladding to a steel frame. City Steel provides self drilling screws that drill their own holes and tap their own threads in one step. This means your workers finish roof installation faster because they do not need to pre-drill into the steel purlins. You get 100% leak protection with built-in EPDM rubber washers that stay flexible and do not crack in the Bangladesh heat. Every screw has a zinc-galvanized coating that prevents rust for over 20 years, even in humid factory environments. These screws have the high pull-out strength needed to keep your roof sheets secure during heavy storms and high winds. This fastener is the standard choice for PEB warehouses, industrial sheds, and garment factories from Savar to Chittagong.
Product Description
Roofing Screw for PEB & Industrial Sheds - Hex Head Self Drilling Screws
A roofing screw is a specialized fastener designed to attach metal sheets to steel or timber frames. City Steel provides high-grade self drilling screws (also known as tek screws) that remove the need for separate drilling and tapping. This helps you complete your factory roof installation faster while ensuring a tight, leak-proof fit.
Our sheet metal screws come with a built-in drill point that can pierce steel up to 12mm thick, depending on the gauge. Because the self drilling screw price in Bangladesh changes based on the coating (zinc or color-coated) and the quantity you need, we provide custom quotes for every project.
These screws are the standard choice for CI sheet fixing, industrial deck sheets, and wall cladding in pre-engineered buildings (PEB).
Whether you are a contractor building a new warehouse or a factory owner replacing old roof sheets, our screws provide a secure, rust-resistant grip.
Why Choose City Steel Self Drilling Screws?
Fast Installation with Self Drilling Points
A self drilling screw has a tip that acts like a drill bit. You do not need to punch or drill a hole in the metal sheet first. This saves your workers time on the roof and reduces labor costs. The screw cuts its own perfect-fit thread as it goes into the steel purlin.
Leak-Proof Seal with EPDM Rubber Washers
Every self drilling screw with washer we supply includes a high-grade EPDM (Ethylene Propylene Diene Monomer) rubber seal. Unlike cheap plastic washers that crack in the sun, EPDM stays flexible. It compresses against the sheet to block rainwater, which is vital for protecting goods inside your warehouse.
High Corrosion Resistance for Long Life
A galvanized self drilling screw is coated in zinc to prevent rust. For coastal areas or chemical factories in Bangladesh, we also provide stainless steel self drilling screws. These finishes ensure your roof stays attached for 20 to 25 years without the screw heads snapping off due to corrosion.
Color Matching for a Professional Finish
We offer color matching roofing screws to match your roof sheets (such as Blue, Off-White, or Green). These screws have a powder-coated hex head that blends in with the sheet. This prevents the "polka-dot" look on your factory walls and provides an extra layer of protection against the weather.
Strong Grip with Hex Head Design
The hex head self drilling screw is the industry standard because it does not slip. Your power tool socket fits firmly over the six-sided head, allowing high torque. This ensures the screw is driven straight and tight into the steel rafter or purlin every time.
Technical Specifications: roofing screw
| Specification | Details |
| Product Type | Self Drilling Screw (Tek Screw / Self Tapping) |
| Material | Carbon Steel (C1022) or Stainless Steel (SUS 304/316) |
| Head Type | Hex Washer Head |
| Drill Point | #2, #3, #4, or #5 (based on steel thickness) |
| Diameter / Gauge | #10 (4.8mm), #12 (5.5mm), #14 (6.3mm) |
| Length | 20mm to 75mm (custom lengths available) |
| Coating / Finish | Zinc Galvanized / Ruspert / Color Powder Coated |
| Washer | 14mm / 16mm / 19mm EPDM Rubber Washer |
| Standard | DIN 7504K / AS 3566 |
| Application | Fixing roof/wall sheets to C/Z Purlins and Steel Beams |
| Lead Time | Available in stock; bulk orders 2–3 days |
Note: The diameter and length you need depend on the thickness of your roof sheet and the steel purlin below it. Our engineers can help you choose the right gauge for your load requirements. Get a Custom Spec & Quote
Is This Roofing Screw Right for Your Project?
These screws are the right choice if you are installing metal roofs or wall panels on a steel structure. They are widely used in:
- Industrial Warehouses: To fix long-span roof sheets and deck sheets.
- Garment & Textile Factories: For secure, leak-proof cladding.
- Poultry & Cold Storage: Where humidity is high and rust resistance is needed.
- PEB Structures: For fixing rafters, purlins, and flashing.
These are best for projects in industrial zones like Gazipur, Savar, Narayanganj, and Chittagong where high-speed construction is required.
Not ideal for: Fixing metal sheets directly into thick concrete without a plastic plug, or for very thin DIY plastic sheets that might crack under the pressure of a hex head screw. For those, a different self tapping screw might be better.
Delivery & Supply Across Bangladesh
City Steel Corporation maintains a large stock of fasteners at our Hemayatpur, Savar facility. We deliver roofing screws and other PEB components directly to project sites nationwide.
- Selection: Tell us your sheet type and purlin thickness.
- Quote: We provide a price based on the total quantity (usually sold by the bag or thousand pieces).
- Delivery: We ship via our own transport or courier to your site in Dhaka, Comilla, Sylhet, or anywhere in Bangladesh.
Why Order Your Roofing Screws from City Steel Corporation?
City Steel Corporation has built steel structures across Bangladesh since 2015, with 150+ completed projects for clients like Singer Bangladesh, Vintage Garments, and the Bangladesh Army. You deal with the supplier and fabricator directly, ensuring you get the right grade of fastener for your specific steel structure.
What you get:
- Free engineering consultation on your requirements
- Screws that match the design life of your steel building
- Certified galvanized and stainless steel options
- Delivery to project sites nationwide
- Correct washer sizing to prevent roof leaks
- Flexible, project-based payment terms
Call or WhatsApp our engineers: +880 1711-787556 / +880 1711-991775 (Sat–Thu, 9 AM – 6 PM).
Roofing Screw - Frequently Asked Questions
What is the self drilling screw price in Bangladesh?
The price of a self drilling screw depends on the size (length/gauge), the material (MS or Stainless Steel), and the coating. Bulk orders for factory projects always get a lower rate per piece than retail. Contact us with your quantity for a current market rate.
What is the difference between a self drilling and a self tapping screw?
A self drilling screw (Tek screw) has a tip like a drill bit and can create its own hole. A self tapping screw needs a pre-drilled pilot hole before it can cut its own threads. For steel structures, self-drilling is much faster.
Which size screw do I need for a standard CI sheet?
For most industrial CI sheet fixing, a #12 x 55mm or #12 x 65mm screw is used. This allows the screw to pass through the crest (top) of the sheet ripple and securely into the steel purlin.
How do I prevent my factory roof from leaking at the screw points?
Always use a rubber washer roofing screw with an EPDM seal. Ensure your workers do not over-tighten the screw, which can crush the washer, or under-tighten it, which leaves a gap for water.
Can these screws go through thick steel beams?
Standard #12 screws can drill through up to 6mm of steel. For thicker built-up beams (up to 12mm), you need a "Series 500" or #5 point tek screw. Tell us your steel thickness, and we will provide the correct point.
Do you have color-matched screws for blue or white roofs?
Yes. We supply color matching roofing screws that are powder-coated to match standard Bangladeshi roof sheet colors. This improves the look of the building and prevents head rust.
Products That Go With This
- Industrial Roof Sheets: The primary material these screws are designed to fasten.
- C & Z Purlins: The horizontal steel members that the screws grip into.
- Capping & Flashing: Small screws are used here to seal the edges and ridges of the roof.
- Industrial Deck Sheets: Heavier screws are needed to fix these to floor beams.
Get a Custom Quote for Your Roofing Screws Today
Ensure your factory roof stays secure and leak-free with grade-certified self drilling screws. Avoid the risk of rust and roof damage by using the right fasteners for the Bangladesh climate. We offer nationwide delivery and expert advice for all PEB projects.
✔ 150+ Projects Completed ✔ High-Grade EPDM Washers ✔ Nationwide Delivery
Request a Quote Now:
Call/WhatsApp: +880 1711-787556