BSP thread, nominal size 1-1/2 Inch BSP — dimensions

For BSP thread, nominal size 1-1/2 Inch BSP, threads per inch (tpi) is 11; major (outside) diameter (mm) is 47.80, verified against its source on 2026-08-12.

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

1-1/2 Inch BSP | 47.80 mm | 45.5 mm | 11

— lsengineers.co.uk, retrieved 2026-08-12

Source

• lsengineers.co.ukhttps://www.lsengineers.co.uk/advice-centre/bsp-thread-sizes-explained

Last verified against source: 2026-08-12. Due for re-check by 2028-08-11. This page as Markdown · OKF bundle · full dataset as JSON.