The SAS Fortress A (FORTA) Hitch Lock is a heavy-duty, insurance-approved security solution designed to protect your trailer from theft whether hitched or unhitched.
Engineered specifically with Knott Avonride hitch heads in mind—commonly found on Ifor Williams and Nugent trailers—this hitch lock fully encloses the hitch head and bolts, preventing unauthorised access and making it extremely difficult for thieves to tamper with or remove your trailer.
Ideal for use at home, on-site, or when stopping at motorway services, the Fortress A ensures your trailer stays exactly where you left it. Its ability to be fitted while hitched adds an extra layer of protection, stopping opportunistic thieves from quickly unhitching and driving off.
Built from tough steel and finished in a bright red coating for high visibility, it acts as both a physical barrier and a strong visual deterrent.
✅ Key Features
- 🔒 Insurance-approved hitch lock
- 🛡️ Fully encloses hitch head for maximum security
- 🔩 Twin hardened locking pins for superior strength
- 🧱 Anti-drill lock protection for added theft resistance
- 🚗 Can be fitted hitched or unhitched
- 🎨 Bright red finish for strong visual deterrent
- ⚙️ Durable steel construction with zinc passivate coating
- 📦 Compact design – ideal for storage and transport
- 🧰 Optional carry case available
🔗 Compatibility / Fits
The Fortress A Hitch Lock is compatible with:
- Knott Avonride hitch heads (commonly on Ifor Williams & Nugent trailers)
- Ifor Williams trailers & horseboxes
- Nugent trailers
- Brian James trailers (over 3.5 tonne) with AK351 hitch
- AL-KO AK350 / AK3500 cast heads
- Winterhoff WW200 cast head
⚠️ Important:
The AK351 hitch is often mistaken for the AL-KO AK301 (which requires the Fortress B). Always check the hitch model stamped on your coupling before purchasing.
💡 Why Choose the SAS Fortress A?
If you’re running plant trailers, livestock trailers, or transporting valuable machinery, theft is a real risk—especially with popular brands like Ifor Williams.
The Fortress A is designed to eliminate quick theft opportunities, making it a solid investment for:
- Farmers & agricultural contractors
- Plant hire & construction businesses
- Horsebox owners
- Anyone regularly towing high-value trailers