31-03-2018, 12:09 AM
(28-03-2018, 07:08 PM)Colin Morgan Wrote: Hi
When I was working on a 1929 Mulliner saloon recently I found that the left-hand side of the wooden frame had been assembled using left-hand threaded brass screws. I think these are original as the rest of the car has not been messed with. A few of these screws are shown in the picture below. Has anyone else come across them please? Why would they do this – I don’t think the Austin factory used them? Would this help stop the screws loosening when the frame shifts on accelerating/braking/cornering??
Colin
I am intrigued - how on earth did you find out these were LH thread woodscrews ? Given that they would be very uncommon I suspect that anyone would normally spend some time tightening these screws, eventually resorting to damage !!
Why LH woodscrews- I can see why some cars had LH axle nuts and centre lock wheels are usually marked left and right with instructions on the thread, but I cannot see why a screw would benefit from a LH thread ??
Cheers, Tony.