Buy Stainless Steel Self-Drilling Timber Screws | 5x70mm T25 Torx Self Drilling Wood Screws

A2 TX25 Self-Drilling Torx Wood Screws 5.0mm x 70mm

Heavy duty self-drilling timber screws with cutting point

Countersinking ribs under head

T25 6-Lobe (torx) drive recess

ORDER BY 3PM FOR NEXT DAY DELIVERY (MON-FRI)*

ORDER BY 3PM FOR NEXT DAY DELIVERY*

FREE STANDARD DELIVERY ON ORDERS OVER £100*

FREE STANDARD DELIVERY OVER £100*

Description
Delivery

A2 Stainless Steel Self-Drilling Torx Wood Screws

Self-drilling stainless steel wood screws designed for timber-to-timber fixing without the need for pilot holes in most applications. Suitable for exterior use where corrosion resistance and fast installation are important. These screws are also suitable for cement board to timber substrate applications.

Product Features & Typical Applications

Key features

• A2 stainless steel for corrosion resistance in outdoor timber
• Self-drilling point reduces or removes the need for pre-drilling
• Torx TX20 drive for secure bit engagement and reduced cam-out
• Countersinking ribs under the head for a flush finish
• Suitable for use with many tannin-rich timbers

Typical applications

• Timber framing and general joinery
• Decking, fencing and garden structures
• Cladding and exterior timber boarding
• Steps, balustrades, and outdoor joinery
• Cement boards onto timber substrates
• Landscaping and site timber work

Practical benefits

These screws speed up installation by cutting their own path into timber, reducing time spent pre-drilling. The TX20 Torx drive provides solid engagement, allowing higher torque transfer with less risk of slipping or damaging the head. Countersinking ribs help the head seat cleanly into the timber for a neat, flush finish.

Manufactured from A2 stainless steel, they provide dependable resistance to corrosion in most external environments.

Self-Drilling Wood Screws FAQ's

What does self-drilling mean in wood screws?
Self-drilling wood screws have a specially formed point that helps them cut into timber without a separate pilot hole in many situations.

Do I still need to pre-drill?
In most softwoods pre-drilling is not required. In dense hardwoods, a pilot hole may still be recommended.

What drive type is TX20?
TX20 refers to a Torx drive size. It offers better grip between bit and screw, reducing cam-out and improving driving control.

Are A2 stainless screws suitable for outdoor use?
Yes, A2 stainless steel is suitable for most external timber applications. For coastal or highly corrosive environments, A4 stainless steel is typically preferred.

Can I use these screws on cement board?
Yes, these screws are an excellent choice for cement board as the self-drilling point will drill through the boards without pre-drilling, and the A2 stainless material offers excellent corrosion resistance.

Specifics & Technical Info

Thread diameter (d): 5mm
Length (l): 70mm
Thread length (b): 42mm
Head diameter (dk): 10mm
Shank diameter (ds): 3.54mm
Drill bit length (lp): 5.2mm
Torx recess (TX): TX25
Material: A2 (304) Stainless steel
Tensile strength: 500 N/mm2
Finish: Self-colour (no plating)
European Technical Assessment: ETA 11/0283
UK Technical Assessment: UKTA 22/6473
Installation note: A minimum screw-in depth of 4x the diameter must be ensured. A screw-in depth of 8x the diameter should ideally be achieved.

technical line drawing of a2 stainless steel self drilling torx drive timber screws

Delivery Terms

Orders over £100 will qualify for free 2-3 working day delivery*. Orders under £100 will be subject to a carriage charge - please see below for our delivery options.

We offer a number of different nationwide* services. Please see below for our delivery options.

*Please note that orders to the Isle of Wight, the Isle of Man, the Scottish Isles, the Scottish Highlands, Northern Ireland and the Channel Isles will incur a carriage surcharge.

*Long items greater than or equal to 1.5M in length will be subject to a length surcharge of £12. This surcharge is per shipment, and not per item.

Orders placed before 15:00 with next working day/timed services, Saturday & Royal Mail Special Delivery services will be dispatched the same day (Monday to Friday). Orders placed with any of these services after 15:00 will not be dispatched until the next working day. Orders placed on Saturdays, Sundays or bank holidays will be dispatched on the next working day. Next working day means Monday - Friday, excluding bank holidays. Orders placed with any of the aforementioned services will not be delivered on a Saturday or Sunday. For Saturday deliveries, select 'Saturday Delivery' in the basket.

We aim to despatch all orders with standard services within 2 working days, as long as all of the items are in stock.

Delivery Services

We offer the following delivery services:

Royal Mail standard tracked (3-5 working days) £4.99^^
Royal Mail 24 tracked (1-3 working days) £5.99^^
R/Mail Special Delivery next working day by 1pm^ £14.99^^
R/Mail Special Delivery next working day by 9am^ £39.98^^
Standard courier 2-3 working days £6.98
Express 1-2 working working day^ £8.99
Next working day by 13:00^ £10.99
Next working day by 11:00^ £14.99
DPD Saturday delivery^ £9.98

^Orders placed before 15:00 with next working day/timed services, Saturday & Royal Mail Special Delivery services will be dispatched the same day (Monday to Friday). Orders placed after 15:00 will not be dispatched until the next working day. Orders placed on Saturdays, Sundays or bank holidays will be dispatched on the next working day. Next working day means Monday - Friday, excluding bank holidays. Orders placed with any of the aforementioned services will not be delivered on a Saturday or Sunday. For Saturday deliveries, select 'Saturday Delivery' in the basket.

^^Royal Mail services are only offered to basket weights up to and including 2 kilos only. The 1pm & 9am Special Delivery times are for UK mainland only and will vary for Northern Ireland, Highlands & Islands. Please view the Royal Mail website for full details.

Please note that orders to the Isle of Wight, the Isle of Man, the Scottish Isles, the Scottish Highlands, Northern Ireland and the Channel Isles will incur a carriage surcharge.

Long items greater than or equal to 1.5M in length will be subject to a length surcharge of £12. This surcharge is per shipment, and not per item.

Collection

All orders are available for collection from our stores. Collection orders will normally be ready within 2 hours of the order being placed, as long as all items are in stock at the time of order.

Van Delivery

TC Fixings offers a free van delivery service to Saffron Walden and the surrounding villages.