Evolution A4 Stainless Steel SuperTek7 Composite Panel Fastener with 16mm Washer

Designed for fixing cladding/roofing applications to hot/cold purlins/rails and fastening liner panels and general components to steel.

• Head Style - Hexagonal, 5/16” hexagonal
• Thread Form - Fine Thread with ‘V’ Fluting
• Drill point - TEK 7 Spiral Point
• Material and grade - EN 1.4401 / A4 (AISI 316)
• Additional Coating - ≥ 5µm electrodeposited zinc
• Drill Speed - 1500 – 2500RPM

Key points

The Tek 7 Spiral Point minimises the need for pre-drilling, saving time during installation and ensuring a secure and reliable connection. This feature enhances the overall efficiency of the fastening process, making these screws well-suited for projects where speed and precision are crucial.

The A4 stainless steel construction of the fastener provides exceptional corrosion resistance. This is particularly important for outdoor and marine applications where exposure to harsh elements is common. The A4 stainless steel ensures long-lasting durability and minimises the risk of rust, contributing to the overall stability and reliability of the composite panel installation. The combination of the Tek 7 Spiral Point and Bi-metal technology with A4 stainless steel makes these fasteners a reliable choice for a wide range of construction and assembly projects.

All orders are despatched from our warehouse in West Bromwich, West Midlands.

Next Working Day Delivery

• Order Value Under £500 (ex. VAT) - £6.95
• Order Value Over £500 (ex. VAT) - FREE

Same Day Delivery

• Same Day: £35
• Available in Birmingham, Dudley, Sandwell, Walsall, and Wolverhampton
• Orders must be placed by 12pm. Delivery in as little as 20 minutes.

Scottish Highlands & Islands

Postcodes: IV, HS, KA27-28, KW, PA20-49, PA60-78, PH17-26, PH30-44, PH49-50, AB31, AB33-38, AB45, AB52-56, FK17-21, ZE

• Delivery Charge: £18
• Delivery of insulation and metal profiles to these areas is not included in the standard delivery charge. For these areas, delivery costs are provided on a Price on Application (POA) basis.
• If your delivery address falls within one of these postcodes, you may see two delivery options. Please select the higher-priced option. We are working to improve the checkout experience and appreciate your patience.

Northern Ireland, Isle of Man, and Isles of Scilly

Postcodes: BT, IM, TR21-25

• Delivery Charge: £27
• Unfortunately, we're unable to deliver any insulation and metal profile products to these areas.
• If your delivery address falls within one of these postcodes, you may see two delivery options. Please select the higher-priced option. We are working to improve the checkout experience and appreciate your patience.

Delivery Lead Times

Most products on this site are stock lines, meaning under normal circumstances they'll be available for next day delivery. Some products are not kept in stock and are ordered from the manufacturer after your purchase. These products state the lead times at the top of the product pages. By default, orders containing items with different lead times will be despatched together based on the longest lead time.

Delivery Cut Off Times

The deadline for same-day despatch is 4pm, Monday to Friday. This deadline may not apply if we are unusually busy, if your order is unusually large, or if the carrier's vehicle has reached its weight limit.

Delivery Methods

We deliver nationwide using carriers DPD, Parcelforce and DX Freight. Deliveries within our local area will be made on our own transport. Tracking information will be provided shortly after despatch. For local deliveries, we will call ahead to ensure someone is available to accept the delivery. If you have any special requirements, please let us know at checkout or contact us by phone or email.