#5-40 · National Coarse (UNC)
For #5-40, thread series is National Coarse (UNC); record type is tap_drill; tap drill or decimal size is disputed: #39 per victornet.com, #38 per newmantools.com, recorded from its source on 2026-08-28; source re-checked 2026-11-03.
- Thread or drill designation
- #5-40 our reading
- Record type
- tap_drill our reading
- Tap drill or decimal size
- #39 sources disagree
- 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
#5-40 | #39
— victornet.com, retrieved 2026-08-28
Sources disagree
More than one authority states this, and they do not state the same thing. Both are reproduced with the source each came from — deciding between them is yours, not ours.
Tap drill or decimal size
victornet.com says tap drill or decimal size is #39, as of 2026-08-28.
#5-40 | #39
https://www.victornet.com/reference/Tap_Drill.html
newmantools.com says tap drill or decimal size is #38, as of 2026-08-28.
#5-40 #38
Sources
- victornet.comhttps://www.victornet.com/reference/Tap_Drill.html
- newmantools.comhttps://www.newmantools.com/tapdrill.htm