Sorry to keep going on about these bolts but something is wrong somewhere. I bought two new one's from JSG4x4 - described as M12 x 50mm and on arrival this is correct - BUT. These bolts (yes I know they are really set screws) have to be screwed through a thick lug positioned on the swivel housings and poke out far enough on the brake disc side to allow the mud shield flange, a washer and a nut to be attached.

When this done, the head of the bolt which makes contact to prevent the tyre inner face from fouling the radius arm is not long enough to prevent this. I have politely challenged JSG on this and they assure me the bolt is correct. Are there different bolts for certain chassis number ranges?

In the meantime I have found some suitably sized bolts and cut a thread down the whole length of the shaft but I'm not really happy as the material is a bit soft and the head is not quite as large as the original.

Any ideas or experience would be appreciated.

I just ordered part AFU1234 and they were fine

They don't need to be high tensile so if you've found an M12 bolt that's doing the job' I wouldn't worry on it

on mine the nut and washer are on the inner edge, ie put the nut n washer on first, then into the lug

Well it's as I suspected, there are two types of stop bolts (set screws) used on Defenders - I'm not too sure what makes one type suitable and the other not but last night I accidently bumped in to another Land Rover Forum where this was being (or had been) discussed.

The enquirer stated that using the M12 x 50mm bolts allowed the head of the bolt to either completely miss the section on the axle which is the stop contact point, or partially graze it - never a positive contact. He then ordered another part number - this time from Land Rover and his problem was solved.

So I've realised that the original 50mm bolt has a spanner size of 19mm whilst the other type is 22mm spanner size - so I ordered one through the Barnstaple Dealership and it will available on Tuesday morning. I've also realised that it's best if you get someone to gently turn the steering wheel (engine running) whilst observing what is going on at the stop bolt end. The chances of setting the bolt to the optimum position on first fit is slim and if set incorrectly, will probably bend the bolt due to the action of the power steering. I did gulp when I had to pay just over £14 for the bolt and nut!