British tapered pipe threads (bspt or Rc) chart

**Yukon Eric** · 01-07-2021, 07:33 PM

I am looking for a chart showing all the information to turn a bspt thread. Start diameter, and lengths.
Machinery handbook has 1 page for British pipe threads.

**upm2019** · 01-07-2021, 07:54 PM

Try metric and multi standard they have a lot of good information plus good inventory

**Mtndew** · 01-08-2021, 06:55 AM

This site has a ton of info:
Thread Data Charts

**Yukon Eric** · 01-13-2021, 05:10 PM

The metric and multi standard had a chart that showed a picture of the information I am looking for, but it did not tell you what “L1” dimension is equal to.

The thread data charts, is for bspp, which is a straight pipe thread.
I am looking for information for a tapered pipe thread.

Thank all for the help 🤪

**Mtndew** · 01-14-2021, 07:57 AM

Originally Posted by Yukon Eric

The metric and multi standard had a chart that showed a picture of the information I am looking for, but it did not tell you what “L1” dimension is equal to.

The thread data charts, is for bspp, which is a straight pipe thread.
I am looking for information for a tapered pipe thread.

Thank all for the help ��

This page didn't have the info you want?
Thread Data Charts-R-SERIES PIPE THREAD (BRITISH STANDARD PIPE TAPER = BSPT)PT-SERIES PIPE THREAD (JAPANESE PIPE TAPER)

**Yukon Eric** · 01-17-2021, 02:59 PM

No, it does not tell me the information I am looking for.

Look at this chart, in the upper right corner. It has a picture with letter depicting certain dimensions. L1, a, c, b,d etc.

That is the information I am looking for.