18-12-2019, 08:21 AM
Jon, well worth pressing those thread gauges into service!
Most of the stuff you are likely to encounter is covered here:
https://britishfasteners.com/threads/bsf.html
There are of course some very similar threads between some of the systems which may catch out the unwary, and not always easy to identify by measurement. A thing I've occasionally thought of doing but never quite got around to is to have a 'master' sample of each in the workshop as a means to physically check random fasteners I find in jam jars etc.
Supplies of good BSF/ BSW fasteners are not what they once were and it has to be said quality is variable. If 'recycling' then all manner of things are possible.
Nick, by all means clean up damaged threads but I'd take care to remove as little material as possible especially on hub studs. The old brass A7 wheel nuts easily strip or work loose and need regular checking. For 'faster' cars steel Nylocs and penny washers are a sound idea. Sorry if teaching to suck eggs...
Most of the stuff you are likely to encounter is covered here:
https://britishfasteners.com/threads/bsf.html
There are of course some very similar threads between some of the systems which may catch out the unwary, and not always easy to identify by measurement. A thing I've occasionally thought of doing but never quite got around to is to have a 'master' sample of each in the workshop as a means to physically check random fasteners I find in jam jars etc.
Supplies of good BSF/ BSW fasteners are not what they once were and it has to be said quality is variable. If 'recycling' then all manner of things are possible.
Nick, by all means clean up damaged threads but I'd take care to remove as little material as possible especially on hub studs. The old brass A7 wheel nuts easily strip or work loose and need regular checking. For 'faster' cars steel Nylocs and penny washers are a sound idea. Sorry if teaching to suck eggs...