5/16" · British Standard Fine (BSF)
For 5/16", thread series is British Standard Fine (BSF); record type is tap_drill; tap drill or decimal size is 6.80mm, recorded from its source on 2026-08-28; source re-checked 2026-11-03.
- Thread or drill designation
- 5/16" our reading
- Record type
- tap_drill our reading
- Tap drill or decimal size
- 6.80mm 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
5/16" | 22 | 6.80mm
— newmantools.com, retrieved 2026-08-28
Source
- newmantools.comhttps://www.newmantools.com/tapdrill.htm