Self Drilling Screws | TIMCO Hex Light Section 5.5mm
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TIMCO Self-Drilling Light Section Screws | Hex Head Exterior Silver | 5.5mm

£17.78 inc VAT (£14.81 ex VAT)

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Timco SKU: L100B

Description

These TIMCO self-drilling screws fix roofing and cladding sheet straight onto light steel section. The No.3 drill point cuts its own hole as you drive, so there's no pre-drilling. That saves you a step on every fixing. They'll bore through steel up to 5.0mm thick, which covers most purlins and rails you'll meet on a metal roof or clad wall.

The head is a hex, driven with an 8mm socket. Diameter is 5.5mm and the shank is fully threaded with a 60 degree self-tapping thread, so it pulls tight and holds. The finish is Exterior Silver Organic. It's been through 500 hours of salt spray testing and carries a Corrosion Rating 3, so it's built for outdoor steelwork. This is the plain version with no washer. If you're sealing over sheet you'll want to pair it with a separate bonded washer.

Product Downloads

To request more detais on this product such as a TDS or MSDS, call now 01522 694821 or simply e mail us a request sales@stick2products.co.uk

Key Features & Benefits

  • No.3 self-drilling point cuts its own hole in steel. No pre-drill, so you fix faster.
  • Drills light section steel up to 5.0mm thick. Covers standard purlins and rails.
  • Hex head driven with an 8mm socket. Sits square and won't cam out.
  • 5.5mm diameter, fully threaded 60 degree self-tapping thread for a firm grip.
  • Case and core hardened carbon steel. Hard tip to drill, tough core to hold torque.
  • Exterior Silver Organic finish, 500 hour salt spray, Corrosion Rating 3 for outdoor use.
  • Fire Classification A1 and approved to BS EN 10666 (DIN 7504).

Usage / Application

Use these for fixing metal roofing and cladding sheet onto light gauge steel:

  • Fixing profiled roofing sheet to steel purlins on agricultural and industrial buildings.
  • Securing wall cladding to steel rails and side sheeting.
  • Sheet-to-steel metal construction work where the section is up to 5.0mm thick.
  • Any exterior steel fixing that needs a corrosion-rated screw and no pre-drilling.

These are a metal-to-metal fixing. If you're going into timber rather than steel section, you'll need a different screw.

Specification

  • Brand: TIMCO
  • Type: Self-Drilling Light Section Screw
  • Diameter: 5.5mm
  • Head: Hex (8mm socket)
  • Point: Self-Drilling No.3 (drills its own hole)
  • Max steel thickness: 5.0mm (no pre-drill needed)
  • Thread: 60 degree Self-Tapping, Fully Threaded
  • Drill tip width: 8mm
  • Fixed washer diameter: 12mm
  • Material: Case & Core Hardened Carbon Steel
  • Finish: Exterior Silver Organic
  • Substrate: Steel (roofing/cladding sheet to light section purlins/rails)
  • Recommended RPM: 1,000 - 1,800
  • Salt spray: 500 hours
  • Corrosion Rating: 3
  • Fire Classification: A1
  • Approval: BS EN 10666 (DIN 7504)

FAQs

What's the difference between self-drilling and self-tapping?

A self-drilling screw has a drill point on the tip, so it bores its own hole as you drive it. A plain self-tapping screw cuts a thread but needs a pilot hole first. These TIMCO screws do both. The No.3 point drills the hole and the 60 degree thread taps and grips, all in one go.

How thick a steel section can they drill?

Up to 5.0mm. That's the maximum for the No.3 drill point. As long as your purlin or rail is 5.0mm or under, you can drive straight in with no pre-drilling.

Do I need a washer with these?

This version comes with no washer. For a weathertight roof or clad wall you'll normally want a bonded EPDM washer under the head to seal the fixing. Add one separately, or pick the washered version of this screw if you'd rather have it built in.

What speed should I drive them at?

Between 1,000 and 1,800 RPM. Let the drill point do the cutting and don't lean on it too hard. Push too fast and you can burn the tip before it bites, especially on thicker section.

What socket do I need to drive them?

An 8mm hex socket. Use a nut driver or a socket bit in your impact driver and keep it seated square on the head.

Are they alright for outdoor use?

Yes. The Exterior Silver Organic finish has passed 500 hours of salt spray and carries a Corrosion Rating 3, which suits urban and industrial areas with a low salt atmosphere. They're made for external steelwork like roofing and cladding.