The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => A7 & A10 Engine => Topic started by: RichardL on 03.02. 2010 01:45

Title: My Tool of the Day
Post by: RichardL on 03.02. 2010 01:45

Bought on eBay for about 5 GBP + shipping to the US, 1/4-19 British Standard Pipe die. After about 15 minutes I've got threads on my oil tank's supply and return nipples onto which I can easily thread the oil lines, for the first time.

Richard L.

Title: Re: My Tool of the Day
Post by: muskrat on 03.02. 2010 06:49

Not bad. Not many normal (non brit bike riders) folk know the difference. NPT v's BSP v's Gas threads.
I did my time at Aust Gas Light Co, learnt early.
Cheers

Title: Re: My Tool of the Day
Post by: beezalex on 03.02. 2010 18:07

Bit of an FYI, here, the petcock threads on our machines are 1/4" BSPP (British Standard Pipe Parallel) thread.  This should not be confused with BSPT (British Standard Pipe Tapered) which is a tapered thread like NPT, though for 1/4", BSPT, like BSPP has 19 threads per inch vs. the much more common NPT's 18 TPI.  Confused?  Yea, it's silly innit?

BTW, McMaster-carr carries all these taps and dies in stock, though Richard got a great deal on his.