I need to make a threaded hole with a 1/16-27 thread. I have the tap, but
have looked up in the handbooks I have and cannot find the tap drill size
for this thread. Anybody know what the proper one is?
--
don paolino

According to my chart it would take a size "D". The decimal equivalent size
is .2460. I am assuming that tap is a NPT taper pipe tap, which is where a
1/16th / 27 tap is located on my chart.

Hope this helps,
James Walsh Jr.
http://www.jigsawcustoms.com


"desperado" wrote in message
...

I need to make a threaded hole with a 1/16-27 thread. I have the tap, but
have looked up in the handbooks I have and cannot find the tap drill size
for this thread. Anybody know what the proper one is?
--
don paolino

desperado wrote:
I need to make a threaded hole with a 1/16-27 thread. I have the tap, but
have looked up in the handbooks I have and cannot find the tap drill size
for this thread. Anybody know what the proper one is?


http://www.smithfast.com/pipetap.htm has it listed

thanks. yes. I forgot to mention itwas npt. i couldnt find it in the
machinist handbooks. all they listed for the size is some kind of plug gage
dimensions.
--
don paolino
"James Walsh Jr." jwalsh@Jigsawcustomsdotcom wrote in message
news:ER_1e.137464$%U2.42915@lakeread01...
According to my chart it would take a size "D". The decimal equivalent
size
is .2460. I am assuming that tap is a NPT taper pipe tap, which is where a
1/16th / 27 tap is located on my chart.

Hope this helps,
James Walsh Jr.
http://www.jigsawcustoms.com


"desperado" wrote in message
...

I need to make a threaded hole with a 1/16-27 thread. I have the tap,
but
have looked up in the handbooks I have and cannot find the tap drill
size
for this thread. Anybody know what the proper one is?
--
don paolino

desperado wrote:
thanks. yes. I forgot to mention itwas npt. i couldnt find it in the
machinist handbooks. all they listed for the size is some kind of plug gage
dimensions.
There's a table 8 on page 1369 of 22d edition, Tap Drill sizes for
Internal Dryseal Pipe Threads. D for straight, C without reamer, A with
reamer.
Joe