Mike,
Looks to me like 7/32" is a little on the large size for a hole you want to tap. Take a look here:
http://www.efunda.com/designstandards/screws/tapdrill.cfm
I'd try the 7/32", but it's really a little on the large side for tapping. How about 13/64"? It's just about perfect!
Good luck,
Tony Hurtado
N8i in Si Valley
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OT Tap/drill size
From: Mike J. Shade (mshade@No-Spam)
Date: Sun Sep 28 2003 - 13:18:34 MST
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Need to tap out a hole for a 1/4-20 bolt...anyone have any idea what size
is the proper drill? I've got 7/16 and 7/32 from the net, any idea which
is the right one?
Mike J. Shade: mshade@No-Spam
Sonoita Hills Observatory, Sonoita Arizona
See work done at the observatory: http://c3po.cochise.edu/astro
under the "photographs and images" panel on the left of the screen.
"I like the dark, it's cheap." E. B. Scrooge