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Drill bit/tap size for 3/8" bspt boost gauge tapping

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Drill bit/tap size for 3/8" bspt boost gauge tapping
Paul_13 Offline
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#1
06-04-2015, 10:18 AM
It's been a very long time since I dealt with these kind of things (back in college 8years ago) 

I've ordered a brass bspt adapter 3/8 tapping with 1/4" hose connection. 

Now logic tells me to use a 9.5mm drill bit? Which is what size 3/8" is roughly. Do I just use the barb as a tap or do I need to use a proper tap? 
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Drill bit/tap size for 3/8" bspt boost gauge tapping - by Paul_13 - 06-04-2015, 10:18 AM

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