Just had a look at my old set mate, sorry different, mine look more like a six pointedHere's my locking nut:
If anyone has a matching key and is going to the peak district next Sunday I'd be grateful if you would let me borrow it on the day. Going to order some ordinary bolts to replace, local garage wanted £4 per bolt!
star, I got 20 new bolts off ebay for £17 a few months ago,if you pay for the postage & I
can always send you 4, pm me.