#1-64 · National Coarse (UNC)
For #1-64 · National Coarse (UNC), thread or drill designation is #1-64; record type is tap_drill; tap drill or decimal size is #54; thread series is National Coarse (UNC), recorded from its source on 2026-08-28; source re-checked 2026-09-15.
- Thread or drill designation
- #1-64 our reading
- Record type
- tap_drill our reading
- Tap drill or decimal size
- #54 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
#1-64 | #54
— 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 #54, as of 2026-08-28.
#1-64 | #54
https://www.victornet.com/reference/Tap_Drill.html
newmantools.com says tap drill or decimal size is #53, as of 2026-08-28.
#1-64 #53
Sources
- victornet.comhttps://www.victornet.com/reference/Tap_Drill.html
- newmantools.comhttps://www.newmantools.com/tapdrill.htm