FREE Delivery Over £30 Nett
15,000+ Stock Lines
30 Day Returns
Family Owned & Run
Celebrating 30 Years of Trading.
To mark 30 years of trading this month, we have reduced our carriage paid threshold to £30 nett.
Looking for strong, reliable structural connectors and fixings for your construction projects? Simpson Strong-Tie offers high-performance joist hangers, angle brackets, straps, anchors, and screws—all engineered for safety, durability, and ease of installation. Manufactured in the UK and rigorously tested to meet British and European standards, these products are ideal for timber framing, decking, masonry, and steel connections. With expert support, fast delivery, and innovative solutions like Quik Drive® screw systems, Simpson Strong-Tie provides trusted, code-compliant products for builders, contractors, and engineers across residential and commercial projects.
The Simpson Strong-Tie SDW Structural Wood Screw is a high-strength, 8.0mm diameter fastener engineered for securely joining multi-ply wood members, including plated trusses, engineered timber products, and solid-sawn timber. CE marked to EN14592, it ensures compliance with European structural standards.
Key Features:
Optimized Lengths: Available in sizes tailored for fastening 2, 3, and 4-ply trusses or 45mm engineered timber, such as Laminated Veneer Lumber (LVL).
No Pre-Drilling Required: Designed for easy installation without the need for pre-drilling, enhancing on-site efficiency.
Durable Finish: Constructed from heat-treated carbon steel with a black E-coat™ finish, providing corrosion resistance suitable for indoor applications (Service Class 2).
Comprehensive Packaging: Each box includes a driver bit, ensuring readiness for immediate use.
Ideal for structural applications requiring robust wood-to-wood connections, the SDW Structural Wood Screw offers reliable performance and ease of installation for professionals in the construction industry.
1. Trusted Structural Performance
With over 60 years of experience, Simpson Strong-Tie offers more than 1,000 rigorously tested products, including joist hangers, angle brackets, and restraint straps. Their UKAS-accredited testing facility ensures that products meet high standards for strength and reliability, providing builders with confidence in load-bearing applications.
2. British Manufacturing and Rapid Delivery
Operating from a substantial facility in Tamworth, Staffordshire, the company produces up to 60 tonnes of steel products weekly. Their membership in the 'Made in Britain' initiative underscores their commitment to local manufacturing. With three UK distribution centres, they offer swift delivery to both stores and construction sites.
3. Comprehensive Technical Support
Simpson Strong-Tie provides direct access to engineers for technical advice, ensuring expert guidance on product selection and installation. Their extensive online resources include CAD/BIM libraries, design software, and training videos, supporting professionals throughout the construction process.
4. Innovative and Ergonomic Solutions
The company offers advanced tools like the Quik Drive® collated screw system, designed for efficiency and ease of use in various applications, such as decking and drywall installations. This system minimizes physical strain and increases productivity on job sites.
5. Commitment to Quality and Sustainability
Simpson Strong-Tie adheres to international quality standards, including ISO 9001 for quality management and ISO 14001 for environmental management. Their products are CE marked, ensuring compliance with European safety and performance standards.
In summary, Simpson Strong-Tie combines decades of expertise, robust UK manufacturing, and a customer-centric approach to deliver reliable structural solutions for the construction industry.
Specifics
Length (I): 89mm
Diameter (D): 8mm
Material: Heat treated carbon steel - black E-coat™
Simpson part number: SDWS22312DBB-R50

Delivery Options
TC Fixings Ltd offers a range of delivery services across the UK to suit different order sizes and delivery times. Orders are dispatched using reliable courier and postal services to ensure products arrive quickly and safely.
Delivery Summary
Free delivery: Orders over £30 nett qualify for free delivery
Same-day dispatch: Orders placed before 15:00 Monday–Friday are usually dispatched the same day (subject to stock availability)
Collection: Available from our premises
Local delivery: Free van delivery available in Saffron Walden and surrounding villages
Free Delivery
Orders over £30 nett qualify for free delivery.
If your order is close to the threshold, adding additional items may allow you to qualify for free delivery.
Free delivery applies to standard mainland UK delivery only.
Delivery Charges
Orders under £30 nett are subject to carriage charges. Available delivery options are shown below.
Royal Mail Services (Up to 2kg)
| Service | Delivery Time | Cost |
|---|---|---|
| Royal Mail Standard 48 Tracked | 3–5 working days | £4.99 |
| Royal Mail 24 Tracked (Most Popular) | 1–3 working days | £5.99 |
| Special Delivery by 1pm | Next working day | £14.99 |
| Special Delivery by 9am | Next working day | £49.99 |
Royal Mail services are available for consignments up to 2kg.
Courier Services
| Service | Delivery Time | Cost |
|---|---|---|
| Standard Courier | 2–3 working days | £6.98 |
| Express Delivery (Most Popular) | 1–2 working days | £8.99 |
| Next Working Day by 13:00 | Next working day | £10.99 |
| Next Working Day by 11:00 | Next working day | £14.99 |
| Saturday Delivery | Saturday | £9.98 |
Orders placed before 15:00 Monday–Friday are normally dispatched the same working day, subject to stock availability.
Delivery Surcharges
Additional charges may apply in certain circumstances.
Extended Delivery Areas
Orders to the following locations may incur additional delivery charges:
Isle of Wight
Isle of Man
Scottish Highlands
Scottish Isles
Northern Ireland
Channel Isles
These charges will be shown at checkout where applicable.
Long Item Surcharge
Items measuring 1.5 metres or longer are subject to a £12 length surcharge per shipment.
Dispatch Information
Orders placed before 15:00 Monday–Friday are normally dispatched the same working day when all items are in stock.
Orders placed after this time, or on weekends and bank holidays, will be dispatched on the next working day.
Next working day delivery services apply Monday–Friday excluding bank holidays.
Collection
Customers may collect orders from our premises.
Collection orders are normally ready within 1 hour, provided all items are in stock. Please wait for confirmation before travelling to collect your order.
Local Van Delivery
TC Fixings offers a free local van delivery service to customers in Saffron Walden and surrounding villages.
Please contact our team for further information if you are located in this area.
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Each£45.58
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Each£12.61
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Each£23.04
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Each£24.33
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Each£13.70
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Each£18.79
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8.0x89mm
Pack of 12
SKU: SIMSDW22312-R12DBB
3 In Stock
£15.84
EACH
8.0x89mm
Pack of 50
SKU: SIMSDW22312-R50DBB
4 In Stock
£46.08
EACH