1/4" · British Standard Fine (BSF)
For 1/4" · British Standard Fine (BSF), thread or drill designation is 1/4"; record type is tap_drill; tap drill or decimal size is 5.30mm; thread series is British Standard Fine (BSF), recorded from its source on 2026-08-28; source re-checked 2026-09-15.
- Thread or drill designation
- 1/4" our reading
- Record type
- tap_drill our reading
- Tap drill or decimal size
- 5.30mm verified
- Thread series
- British Standard Fine (BSF) 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
1/4" | 26 | 5.30mm
— newmantools.com, retrieved 2026-08-28
Source
- newmantools.comhttps://www.newmantools.com/tapdrill.htm