Posted 6/7/2016 09:03 (#5342072) Subject: hole size to drill for 1/2" NPT tapping?
Needing to drill and tap a hole in a transmission housing casing for a oil return line. Was wondering what size hole to drill to tap for 1/2" NPT. Also what size hole to drill for 3/8" NPT tapping.
hole size to drill for 1/2" NPT tapping?
