Tek Self-Drilling Roofing Stitching Screws – Metal Sheet to Sheet – External Coating

Name: Metal Sheet to Sheet Tek Screws 6.3x22mm | Insane Bulk Discounts
Brand: Discount Trade Supplies
SKU: S22W16B-SAMTI
Price: 4.38 GBP
Availability: InStock

£4.38£5.26 EX VATINC VAT

Self-drilling stitching screws for joining metal roofing sheet to sheet without pre-drilling. Features a self-drilling point, tapered shank, and washered hex head. Suitable for metal up to 1.6mm. Box of 100.

Credit Plans Available

Description

These metal sheet to sheet tek screws are designed for stitching two metal roofing sheets together along the overlap, without the need to pre-drill. The self-drilling point does the work for you, cutting through the material cleanly and pulling the sheets tight in one operation. Fast to install and consistent in result, they are the standard choice for metal roof and cladding work where sheet-to-sheet fixing is needed at the seam.

The 6.3 x 22mm size is well suited to standard metal roofing profiles. The tapered shank helps draw the sheets together as the screw seats, giving a firm, weather-tight connection at the lap joint. The washered hexagon head spreads the load and seals the fixing point, which matters when you are dealing with exposed roof conditions and water finding every gap it possibly can.

Why the External Coating Matters on Sheet to Sheet Tek Screws

The external coating on these metal sheet to sheet tek screws provides corrosion resistance suited to roofing applications where the fixings are exposed to the elements. Without adequate protection, bare steel fixings will rust at the head and seam, leaving staining on the sheeting and eventually losing grip. These are built to hold up in outdoor conditions over the long term, not just until the scaffold comes down.

They arrive in a box of 100, which is a practical quantity for a typical roofing run. If you are working through a larger project, bulk pricing is available and worth looking at before you order one box at a time.

Pro Tip: Run your drill at a moderate speed when stitching thin sheet metal: too fast and the drill point can skate or overheat, too slow and it stalls before it seats properly.

Applications

These tek screws are used primarily in metal roofing and cladding installations where two sheets need to be stitched together at the overlap or seam. They are a common sight on agricultural buildings, industrial units, warehouses, and portal frame structures where profiled metal sheet is the standard roof covering. Roofers and cladding installers use them routinely alongside through-fix screws to complete the full fixing pattern on a sheet run.

Best For

Stitching metal roofing sheets at lap joints
Cladding panel seam fixing
Agricultural and industrial roofing
Portal frame and steel-framed structures

Compatible With

Metal sheet up to 1.6mm
Profiled steel roofing sheets
Corrugated metal cladding panels
Standard hex head power drivers

Key Features

Self-drilling point, no pre-drilling required
Tapered shank draws sheets together
Washered hexagon head
External corrosion-resistant coating
6.3 x 22mm size

Not suitable for: Not suitable for fixing sheet to structural steel or timber substrates. These are stitching screws only and are not rated as primary through-fix fasteners.

Usage

Fit a suitable hex driver bit to your drill or impact driver and set the torque appropriately for thin sheet metal. Position the screw at the sheet overlap, apply steady pressure, and let the self-drilling point engage before increasing speed. Drive until the washer is seated firmly against the sheet surface without deforming it.

Check the sheet overlap is aligned correctly before starting the fixing run
Fit a hex driver bit to your drill or impact driver
Position the screw at the seam point on the sheet overlap
Apply firm downward pressure and start at low speed to allow the drill point to engage
Increase speed once the point has bitten and drive through both sheet layers
Stop when the washered head is seated firmly, taking care not to overdrive and deform the sheet

FAQs

Do I need to pre-drill before using these stitching screws?

No. The self-drilling point is designed to cut through the metal sheet without any pre-drilling, as long as the combined thickness of the two sheets being stitched does not exceed 1.6mm. Beyond that limit, the drill point may struggle to penetrate cleanly.

What drive size do these screws take?

These use a standard hexagon head drive. A 5/16 inch or 8mm hex driver bit fitted to a drill or impact driver is the correct tool for installing them.

Technical Information

Manufactured from steel with an external protective coating to resist corrosion in exposed roofing environments. The self-drilling tip is hardened to penetrate sheet metal up to 1.6mm combined thickness without pre-drilling. The tapered shank and integrated bonded washer under the hex head provide load distribution and a weather-resistant seal at the fixing point. Size: 6.3 x 22mm.

Size	6.3 x 22mm
Head Type	Hexagon with bonded washer
Point Type	Self-drilling (Tek point)
Maximum Sheet Thickness	1.6mm combined
Coating	External corrosion-resistant coating
Application	Sheet to sheet stitching
Box Quantity	100