#4-40 · National Coarse (UNC)
For #4-40 · National Coarse (UNC), thread or drill designation is #4-40; record type is tap_drill; tap drill or decimal size is #43; thread series is National Coarse (UNC), recorded from its source on 2026-08-28; source re-checked 2026-09-15.
- Thread or drill designation
- #4-40 our reading
- Record type
- tap_drill our reading
- Tap drill or decimal size
- #43 verified
- Thread series
- National Coarse (UNC) 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
#4-40 | #43
— victornet.com, retrieved 2026-08-28
Source
- victornet.comhttps://www.victornet.com/reference/Tap_Drill.html