Ferrotek Steel to Steel Heavy Section Self Drilling Screw | Heavy Gauge Steel Fixings
- Built for heavy section steel โ engineered for thick / structural steel connections (within rated capacity).
- Selfโdrilling tip โ drills and taps in one operation, saving time and labour on site.
- High pullโout & shear performance โ heavyโduty shank and thread for structuralโgrade fixings.
- Hex head drive โ positive drive and high torque transfer for demanding applications.
- Corrosionโresistant finish* โ suitable for exposed applications where a protective coating is required (*check specific class).
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Ferrotek Steel to Steel Heavy Section Self Drilling Screw
Ferrotek Steel to Steel Heavy Section Self Drilling Screws are highโperformance fixings designed
for fastening thick / heavy gauge steel sections together in one operation. With a robust
selfโdrilling tip, heavyโduty shank and highโtorque thread design, they drill, tap and fasten
in a single step, eliminating the need for separate pilot holes in most heavy section steel
applications.
Ferrotek Steel to Steel Heavy Section Self Drilling Screws are purposeโdesigned for fastening
heavy gauge steel members such as purlins, channels, beams and structural framing components.
The long, hardened selfโdrilling point is engineered to penetrate thicker steel sections within
its stated drilling capacity, before the thread engages and clamps the materials securely.
Typically featuring a hex washer head for high bearing area and positive drive, these screws are
ideal for structural metalwork, heavy cladding rails, secondary steelwork and assemblies where
high strength and reliability are required. The selfโdrilling design removes the need for
separate drilling and tapping in many applications, improving productivity and consistency.
Manufactured from highโgrade carbon steel with a specialist antiโcorrosion coating (check
product details for exact class, e.g. Class 3 / Class 4 or equivalent), Ferrotek Steel to Steel
Heavy Section Self Drilling Screws are widely used in industrial, commercial and infrastructure
projects where steelโtoโsteel fixings must perform in demanding conditions.
Typical Use Cases
- Fixing heavy gauge steel purlins and rails to structural steel.
- Connecting secondary steelwork, brackets and cleats to main steel frames.
- Attaching heavy support angles, channels and plates to steel beams and columns.
- Structural fixings in portal frame buildings, industrial sheds and warehouses.
- General heavy steelโtoโsteel connections where a selfโdrilling fastener is specified.
Installation & Usage Tips
- Check drilling capacity: Confirm the combined steel thickness is within the screwโs rated selfโdrilling range (see Ferrotek data sheet).
- Use correct driver & socket: Typically driven with a hex socket (e.g. 5/16″ or 8mm โ check product details) on a suitable drill/driver.
- Control speed: Use moderate RPM โ excessive speed can overheat the drill point and reduce life/performance.
- Maintain steady pressure: Let the drill point do the work; excessive force can burn out the tip or strip threads.
- Avoid misalignment: Keep the screw perpendicular to the steel face to ensure proper drilling and full thread engagement.
Technical Information (Typical)
Exact specification varies by size and coating; always refer to the Ferrotek packaging or
technical data sheet for the exact product. Typical characteristics include:
- Brand: Ferrotek.
- Type: Steel to steel heavy section self drilling screw.
- Application: Heavy gauge steelโtoโsteel fixings in structural and secondary steelwork.
- Head: Hex washer head for high bearing surface and strong drive (socket size per product spec).
- Point: Extended selfโdrilling tip designed for thick steel (capacity stated per size).
- Thread: Heavyโduty thread form optimised for steel substrates.
- Material: Hardened carbon steel.
- Finish / Coating: Corrosionโresistant coating suitable for structural / external use (e.g. highโbuild organic or zincโbased โ check class).
- Sizes: Available in multiple diameters and lengths to suit different steel thicknesses and connection details.
- Standards / approvals: May carry structural approvals or be tested as part of specific system designs โ consult Ferrotek technical documentation.
For drilling capacities (max steel thickness), pullโout and shear values, minimum edge distances,
spacing and installation torque recommendations, always consult the official Ferrotek data sheet
for the specific Steel to Steel Heavy Section Self Drilling Screw you are using.
Key Features
- Engineered for heavy section steel โ suitable for thicker, structural members (within rating).
- Selfโdrilling & selfโtapping โ eliminates most preโdrilling operations.
- Hex washer head โ high bearing area and reliable torque transfer.
- Highโstrength performance โ designed for demanding steelโtoโsteel applications.
- Durable corrosion protection โ for longโterm use in exposed environments (check coating class).
Frequently Asked Questions (FAQs)
1. What are Ferrotek Steel to Steel Heavy Section Self Drilling Screws used for?
They are used to fix thicker, heavy gauge steel sections together โ such as purlins, channels,
angles and brackets to main steel frames โ without the need for preโdrilling in many cases,
provided the steel thickness is within the screwโs rated capacity.
2. How thick can the steel be for these selfโdrilling screws?
Drilling capacity depends on the specific screw size and design. Each product will have a
maximum total steel thickness it can drill through (e.g. several millimetres of steel).
Always check the Ferrotek technical data sheet for the exact capacity of the size you are using.
3. Do I need to preโdrill for heavy section steel?
Not usually, as long as the combined thickness is within the screwโs selfโdrilling capacity.
For very thick or particularly hard steel, preโdrilling may be required โ refer to the
manufacturerโs guidance and project engineerโs recommendations.
4. Are these screws suitable for external use?
Yes, they are generally supplied with a corrosionโresistant coating that makes them suitable
for exposed structural applications. However, you must match the coating class to the
environment (e.g. rural vs coastal vs industrial) and follow project specifications.
5. Can I use an impact driver to install them?
Some installers use impact drivers for selfโdrilling screws, but Ferrotek typically recommends
a controlledโspeed drill/driver to avoid damaging the drill point or overโtightening. Check
product guidance and, if using an impact driver, keep speed and impact low and well controlled.
Common Uses / How to Use
To get the best from Ferrotek Steel to Steel Heavy Section Self Drilling Screws:
- Confirm the screw size and drilling capacity are suitable for the combined thickness of the steel members.
- Fit the correct size hex socket to a variableโspeed drill/driver.
- Position the steel members and clamp if necessary to prevent movement.
- Hold the screw perpendicular to the surface and begin drilling at moderate speed with steady pressure.
- Allow the drill point to fully penetrate and then continue driving until the head seats firmly โ avoid overโtightening.
| โ Cloud Rating | Approx. Salt Spray Hours* | Description |
|---|---|---|
| โ 1 Cloud | < 100 hrs | Indoor / fully sheltered use |
| ๐ค 2 Clouds | ~100 โ 500 hrs | Indoor + sheltered outdoor |
| ๐ฆ 3 Clouds | ~500 โ 1,000 hrs | General outdoor use with specialist coating |
| ๐ง 4 Clouds | ~1,000 + hrs | A2 stainless steel โ exterior use inland |
| โ 5 Clouds | 1,000 + hrs / โmarine gradeโ | A4 stainless โ coastal / high-exposure use |
*Approximate values based on typical corrosion testing standards (salt spray testing to first rust).
Marcโs Cloud Rating โ Always First 4 Fixings Corrosion Resistance Guide
Choosing the right screw or fixing is all about matching it to the environment โ especially when it comes to
corrosion resistance.
Thatโs why at Always First 4 Fixings, weโve created a quick and simple way to help you pick the perfect product for any job:
โ๏ธ Marcโs Cloud Rating
Each fixing on our site is given a Cloud Rating (โ๏ธ to โ๏ธ) โ your easy guide to how well it stands up to the weather. The more clouds, the more corrosion-resistant the fixing!โ๏ธ 1 Cloud โ Indoor / Covered Outdoor Use
Designed for: Dry indoor environments or outdoor areas completely covered from the elements. Perfect for internal projects, garages, lofts, or sheltered spaces where moisture exposure is minimal.๐ค๏ธ 2 Clouds โ Indoor / Sheltered Outdoor Use
Designed for: Indoor use or external areas with some protection from direct rain or weather. Ideal for porches, under decking, or covered outdoor structures where occasional moisture may occur.๐ฆ๏ธ 3 Clouds โ General Outdoor Use
Designed for: Both indoor and outdoor use. Typically features specialist corrosion-resistant coatings and undergoes 500โ1000 hours salt spray testing. Great for garden furniture, fencing, sheds, or exposed outdoor areas not constantly hit by sea air.๐ง๏ธ 4 Clouds โ A2 Stainless Steel
Designed for: Tough external environments. Made from A2 stainless steel, these screws are durable and weather-resistant โ ideal for outdoor projects more than 10 miles inland. Reliable for all general external applications and completely fine for indoor use too.โ๏ธ 5 Clouds โ A4 Marine Grade Stainless Steel
Designed for: The harshest, most demanding environments. Made from A4 stainless steel (marine grade), these fixings offer maximum corrosion resistance โ perfect for coastal areas, marine use, or anywhere exposed to salt air and constant moisture. The โbig daddyโ of weatherproof fixings โ unbeatable outdoors, worry-free indoors.How to Use Marcโs Cloud Rating
Youโll find the Cloud Rating (โ๏ธโโ๏ธ) shown on each product across our website. Simply match the rating to your projectโs environment and know exactly how your fixing will perform โ rain or shine! Always First 4 Fixings โ Helping You Choose with Confidence.| Size | 5.5 x 38mm (100), 5.5 x 50mm (100), 5.5 x 75mm (50), 5.5 x 100mm (50), 5.5 x 32mm (100), 5.5 x 25mm (100) |
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Shipping Policy
At Always First 4 Fixings, we know that your projects rely on fast, dependable delivery. Thatโs why we offer flexible UK shipping options designed for tradespeople and businesses:
Fast Dispatch: Orders are processed and dispatched within 24 hours on working days.
Free shipping on all orders over ยฃ60 (UK mainland).
Express options available to keep your jobs moving.
Click & Collect: Order online and pick up at your convenience (if applicable).
Reliable Couriers: We use trusted UK carriers to ensure your fixings and fasteners arrive on time.
Youโll receive tracking details as soon as your order leaves our warehouse. Delivery times may vary depending on location and availability, but we work hard to get your order to you as quickly as possible.
















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