27 May 2007 @ 19:59:28 pm
Are there any difference in strenght between the galvanized 8.8 bolts for the towbar, and the non-galvanized 8.8 Steel bolts/nuts which you buy from a specialized hardware shops ?
The factory fitted towbar which came with my vehicle is fitted with 10.9 bolts, of the same size of the standard 8,8 bolts - which one is the best, as I don't seem to find replacements for the 10.9 ones ?
The only reason why I want to replace them is that I removed them to fit my bicycle rack during the past week, and the threads are all rusted - strange for galvanized bolts - and I only have the vehicle for 6 months.
On the 'ball' which I removed form the towbar, a sticker is attached with the following message on:
" Use BS3692 Grade 8.8 M16 Bolts, and grade 8 nuts with lockwashers. Tighten to 240nm"
240nm is not much, as according to my vechile's Haynes manual the rearwheel hub must be torqued 405nm. Is 240nm the maximum thiss 8.8 bolts can handle ? What about the 10.9 bolts ?
Any feedback much appreciated
Kaspaas Breekwater (Hope my English is not that bad)