[TR] tap and die question

[Bob Danielson]

Paul,
Someone already responded about the difference in threads between the two
but I recently learned something I didn't know about Tap & Die. I'm sure
many people already know this but...do not drill, for example, a 3/8" hole
for a 3/8" tap. There are charts out there that tell you the correct size
hole to drill for each tap size you want to use. And it varies by coarse vs
fine thread. Here's a couple of references.
http://www.newmantools.com/tapdrill.htm & http://tinyurl.com/2gztrj


Bob Danielson
1975 TR6 CF38503U
Running w/ Throttle Body Injection
http://tr6.danielsonfamily.org 


-----Original Message-----
From: triumphs-bounces+75tr6=tr6.danielsonfamily.org at autox.team.net
[mailto:triumphs-bounces+75tr6=tr6.danielsonfamily.org at autox.team.net] On
Behalf Of dorpaul
Sent: Saturday, March 15, 2008 7:09 PM
To: list Triumph
Subject: [TR] tap and die question

What?  While looking at my TR3's master cylinders, I sought to clean out the
fixture threads.  It looks like the 3/8-24 thread is almost identical to 1/8
NPT?  Is this right or have I mixed up my tap and die set again?

Thanks, Paul  60 TR3
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