1 3/4
For 1 3/4, thread standard is BSPP; threads per inch (tpi) is 11; thread pitch (mm) is 2.309; major (outside) diameter (mm) is 53.746; minor diameter (mm) is 50.789, recorded from its source on 2026-08-12.
- Thread standard
- BSPP our reading
- Nominal size
- 1 3/4 verified
- Threads per inch (TPI)
- 11 verified
- Thread pitch (mm)
- 2.309 verified
- Major (outside) diameter (mm)
- 53.746 verified
- Minor diameter (mm)
- 50.789 verified
- Thread angle (degrees)
- 55 our reading
- Governing standard
- ISO 228-1 our reading
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
BSPP G 1 3/4 | 1 3/4" | 11 | 2.309 | 53.746 | 52.267 | 50.789
— machiningdoctor.com, retrieved 2026-08-12
Source
- machiningdoctor.comhttps://www.machiningdoctor.com/charts/bsp/