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Old 14th February 2009, 08:40   #1
Dave1w
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PG7 Thread Size

I remember looking it up a while ago but forgot where. Is the PG7 a specific size, with it's own taps available, or do you use an equivalent thread sized tap?
Dave
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Old 14th February 2009, 09:23   #2
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Re: PG7 Thread Size

it's a specific thread, the outher diameter is 12.5 mm, pitch is 1.27 and drill size for tapping is 11.3mm
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Old 14th February 2009, 18:13   #3
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Re: PG7 Thread Size

Quote: (Originally Posted by Edvin M) View Original Post
it's a specific thread, the outher diameter is 12.5 mm, pitch is 1.27 and drill size for tapping is 11.3mm
I'm not sure what you are trying to match, but......

12.5 mm just under 1/2 inch 12.5mm = .492"

1.27mm = .05" .05 "lead" = 20 tpi

1/2" x 20 tpi is a standard SAE Uniform National Fine (UCF) thread.

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Old 15th February 2009, 11:09   #4
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Re: PG7 Thread Size

Quote: (Originally Posted by cool_hardware52) View Original Post
I'm not sure what you are trying to match, but......

12.5 mm just under 1/2 inch 12.5mm = .492"

1.27mm = .05" .05 "lead" = 20 tpi

1/2" x 20 tpi is a standard SAE Uniform National Fine (UCF) thread.

Tobin
ahh.. sorry, didn't think about the UNF, only have tables for metric, UNC and withwort here
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Old 15th February 2009, 11:15   #5
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Re: PG7 Thread Size

Maybe it's to do with a rEvo dream!? wake up call for Paul Raymaekers!


Quote: (Originally Posted by cool_hardware52) View Original Post
I'm not sure what you are trying to match, but......

12.5 mm just under 1/2 inch 12.5mm = .492"

1.27mm = .05" .05 "lead" = 20 tpi

1/2" x 20 tpi is a standard SAE Uniform National Fine (UCF) thread.

Tobin
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Old 15th February 2009, 11:36   #6
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Re: PG7 Thread Size

Yeah, I have a rEvo dream, I am thinking of using, and tapping a hole in the top of a Ray scrubber. Actually, I did find some more info, and they are 12.5mm, with 20 threads per inch which is in the region of 1.25. I think there is a difference in the profile of the thread, but not sure. Really, I think I would just have to buy a specific tap. They say it is for use with conduit.

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Old 15th February 2009, 11:45   #7
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Re: PG7 Thread Size

Quote: (Originally Posted by Dave1w) View Original Post
Yeah, I have a rEvo dream, I am thinking of using, and tapping a hole in the top of a Ray scrubber. Actually, I did find some more info, and they are 12.5mm, with 20 threads per inch which is in the region of 1.25. I think there is a difference in the profile of the thread, but not sure. Really, I think I would just have to buy a specific tap. They say it is for use with conduit.

Dave
You could be right Dave, why don't you pm Paul or Martin for confirmation, I know Martin is threading some sensor housings (HO610) in PG7 threads!

Regards...Paul
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Old 15th February 2009, 11:50   #8
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Re: PG7 Thread Size

Quote: (Originally Posted by Dave1w) View Original Post
Quote:
Yeah, I have a rEvo dream, I am thinking of using, and tapping a hole in the top of a Ray scrubber.
Dave
Mmmm...does that mean you have the H0850 3 sensor housing from Martin?
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Old 4th March 2010, 03:42   #9
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Post Re: PG7 Thread Size

I know this is an old thread, but I was looking for the information so I figured I'd update it a bit.

From this site: MARYLAND METRICS -- THREAD DATA CHARTS (6)

80 Degree profile

Pg Nominal Size Callout: Pg7
Thread Form Type: Pg
Major Diameter: 12.50 mm
Pitch: 1.270 mm
Threads per inch: 20 tpi
Pitch Diameter: 11.89 mm
Minor Diameter Male Thread: 11.28 mm
Thread Height: 0.61 mm
Tap Drill Diameter: 11.40 mm

The dedicated taps are about $50 from McMaster in the US and 20 from Engineering Supplies , Taps and Dies, Wire Inserts, Thread Gauges in the UK

-Scott
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Old 4th March 2010, 08:14   #10
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Re: PG7 Thread Size

Why not just use a metric gland? M12x1,5 is widely available and even smaller. Also one could get very small M6 and M8 glands in brass which are s small you can seal very thin cables with them.

Metric taps are cheap also!
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