Fortress A Hitchlock (FORTA)


The SAS Fortress hitchlock range is a versatile range of high security hitchlocks that can be fitted either when unhitched or hitched to your trailer or caravan.  Very commonly used on Ifor Williams trailers, as the majority of Ifor Williams trailers with brakes have the Knott Avonride hitch coupling the FORT A has been specifically designed to fit.

SKU: 2120761 / 2120762


The Knott Avonride hitch coupling, was specially in mind when the SAS FORT A hitchlock was designed.  The SAS hitchlock gives maximum security by completely covers the hitch head and bolts and makes it insurance approved.  Very commonly used on Ifor Williams trailers, as the majority of Ifor Williams trailers with brakes have the Knott Avonride Hitch coupling


The FORT A hitchlock fits the Knott Avonride hitch, found on most Ifor Williams trailers and Ifor Williams horse boxes, but also a large range of other brands too, such as Nugent, Debon, Cheval Liberte, M-Tec, and many more…

For confirmation on which model hitch fits this hitchlock or other hitch locks, please refer to our hitchlock selection fitting guide.  Please check for the writing on the hitch for the model number, to ensure you are choosing the correct hitch lock.

The FORT A will fit to your trailer hitch whilst unhitched or hitched to your towing vehicle, whilst stationary. This prevents car park or motorway service station thieves separating your car and trailer, because access to the hitch coupling will be hindered by the robust “box cover type” hitchlock.


The maximum security ‘safe style’ lock on all Fortress (FORT) hitchlocks has twin locking pins and the lock also has anti-drill protection with stainless steel keyway pins to further increase security and defeat thieves.

The hitchlock is made of tough steel, finished in zinc pacifate, and painted bright red for maximum visual deterrent.

Compact and easily stored which makes it ideal for touring. Tough plastic hitchlock carry case is available from SAS at an additional cost for easy storage when not in use.

This is an ideal hitchlock for Ifor Williams and other trailers with the Knott Avonride hitch.

Other hitchlocks also available for other hitches – please refer to our hitchlock selection fitting guide.

Click here to download the Fortress hitch lock range fitting instructions.

Additional information

Weight 4.5 kg
MPN (Manufacturers Part Number(s))

2120761, 2120762

EAN (Barcode)


The SAS Fortress A hitchLock fits the following hitches:

Knott Avonride, mostly found on Ifor Williams Trailers)

Al-ko AK350 cast head
Al-ko AK351
Al-ko AK3500

Winterhoff WW200 cast head

If you still are not sure then send a photo of your hitch to What’s App 01444 675889 or email and we will advise by reply.