3/8 Inch BSP
For 3/8 Inch BSP, thread standard is BSP; threads per inch (tpi) is 19; major (outside) diameter (mm) is 16.66, recorded from its source on 2026-08-12.
- Thread standard
- BSP our reading
- Nominal size
- 3/8 Inch BSP verified
- Threads per inch (TPI)
- 19 verified
- Major (outside) diameter (mm)
- 16.66 verified
Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.
What the source says
3/8 Inch BSP | 16.66 mm | 15.2 mm | 19
— lsengineers.co.uk, retrieved 2026-08-12
Source
- lsengineers.co.ukhttps://www.lsengineers.co.uk/advice-centre/bsp-thread-sizes-explained