Thread: Seat Belt Mounting

Originally Posted by Veryan

Ok, I have to fit some lap belts too...and not wanting to start a new post...i'll continue with this one. So, the size of the bolts required are...?? (mention is made of defender seat belt bolts - you can use these? is this correct?)

I have the optional parts cat, and the bolts required are part number 383805. but no mention is made anywhere of the size.....

Bolt size for seat belts is 7/16" UNF. This has been the Australian (and possibly international standard) for more than forty years, and should be the same on all cars, although there may be some which concessionally are allowed a different one. It is unlikely to change.

John

Originally Posted by JDNSW

Bolt size for seat belts is 7/16" UNF. This has been the Australian (and possibly international standard) for more than forty years, and should be the same on all cars, although there may be some which concessionally are allowed a different one. It is unlikely to change.

John

Yep JDNSW is spot on. I bought new generic ones recently and the bolt size was the same as the original, 7/16" UNF.

Originally Posted by TJWA

I bought new generic ones recently

Just out of interest, where did you buy them - and how much?

Thanks, Peter

Originally Posted by peterg1001

Just out of interest, where did you buy them - and how much?

Thanks, Peter

I got them online from www.hemco.com.au

Mine were all lap belts at $55 each (my Landy is a soft top)

The 7/16" bolt size - that is the diameter of the threaded part, not the head - correct?

I managed to salvage one of the bolts used to hold the old belts in with and it was not metric, imperial or even whitworth, or BS come to think about it. The closest I got was a 19mm socket - but that eventually rounded it off and had to get it out with a punch and hammer.

Thanks for all the info guys.

James

Yes, that is the thread size. 7/16" UNF Unified National Fine?

I'm pretty sure high tensile bolts are a big no-no. Apparently it's better for the steel to stretch a little in the event of an impact as opposed to snapping under great force.

Originally Posted by jc109

I'm pretty sure high tensile bolts are a big no-no. Apparently it's better for the steel to stretch a little in the event of an impact as opposed to snapping under great force.

They may be, but I doubt there is any practical problem - the strength of the bolt exceeds the strength of the seat belt by a very large margin regardless as to whether the bolt is high tensile or mild steel. In other words it is (deliberately) way oversize for what it is doing.

John