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Watson577
.300 member

Reged: 05/03/09
Posts: 132
Loc: Fredericksburg, Virginia USA

Old rifle cleaning rod thread size???
#146210 - 19/11/09 10:50 AM

Hello guys,

I just bought an old two-piece rifle cleaning rod and the tip accepts the Parker Hale brushes that I ordered from Peter Dyson. The thread size is a mystery to me though. The major diameter is 0.198" but the pitch is something strange to me--close to 27 or 28 threads per inch but not a match to either. The thread form doesn't look quite like a standard 60-degree V style either. Do any of you know what these threads are? Is it likely to be a Whitworth or B.A. thread? I would like to make an adapter so that I can use standard brushes that are available in the U.S. but I'll need a tap in order to make this adapter.

Thanks,

Jim

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AkMike
.416 member

Reged: 19/11/05
Posts: 2576
Loc: Anchorage, Alaska

Re: Old rifle cleaning rod thread size??? [Re: Watson577]
#146218 - 19/11/09 01:18 PM

It's probably a old whitworth thread. IIRC they used a 55 degree pitch not the standard 60.

--------------------
"When you see that in order to produce, you need to obtain permission from men who produce nothing; when you see that money is flowing to those who deal not in goods, but in favors; you may know that your society is doomed." Ayn Rand

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4seventy
Sponsor

Reged: 07/05/03
Posts: 2210
Loc: Queensland Australia

Re: Old rifle cleaning rod thread size??? [Re: Watson577]
#146227 - 19/11/09 04:09 PM

Years ago I owned a couple of Parker Hale cleaning rods and also some jags and brushes that fit them.
I do remember that they used a different thread to other rods.
I would have thought they "could" be BSF, or B.A. which were sometimes/often used by the Poms way back when.
As you say, the combination of .198" and 27-28 tpi is a strange one.
Nearest BSF thread would be 7/32" X 28 tpi, but this has a major dia of 0.219" or thereabouts.
Could the major dia of your thread be worn or undersize by that much.

No 1 B.A. thread is 28.2 tpi and .2087" major dia.

No 12 UNF is 28 tpi and .216" major dia.

Here is a link to a heap of thread types, maybe it might help.

http://www.watchman.dsl.pipex.com/thread.html

Edited by 4seventy (19/11/09 04:23 PM)

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Watson577
.300 member

Reged: 05/03/09
Posts: 132
Loc: Fredericksburg, Virginia USA

Re: Old rifle cleaning rod thread size??? [Re: 4seventy]
#146289 - 20/11/09 11:47 AM

4Seventy,

I was looking on the Peter Dyson website earlier tonight and I came across a tap and die set for cutting Parker Hale rifle cleaning rod threads. The die is marked .200 PH which makes me think that this might be a strange proprietary thread since the thread is nominally 0.200" in diameter. Here is a link to where I found the tap and die set: http://www.peterdyson.co.uk/cgi-bin/sh00...%23aS330#aS330. Horribly expensive but this may be the only way to go if I can't find anhything else.

Regards,

Jim

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TilleyMan
.333 member

Reged: 23/08/05
Posts: 272
Loc: Melbourne, Australia

Re: Old rifle cleaning rod thread size??? [Re: Watson577]
#146291 - 20/11/09 12:41 PM

Jim

How does US$3.68 for a Parker Hale to 8-32 tpi adaptor sound

OH22 converts .22 cal., male thread, Parker-Hale rods to 8-32 tpi, female.
OH30 converts .30 and larger, male thread, Parker-Hale rifle/pistol rods 8-32 tpi, female.
OHSG converts female end, Parker-Hale shotgun rods to 5/16" – 27 tpi, female.

http://www.brownells.com/.aspx/pid=18393/Product/ROD_ADAPTERS

Cheers

TM

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Watson577
.300 member

Reged: 05/03/09
Posts: 132
Loc: Fredericksburg, Virginia USA

Re: Old rifle cleaning rod thread size??? [Re: TilleyMan]
#146292 - 20/11/09 01:03 PM

TilleyMan,

Thanks for the lead!

Cheers,

Jim

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kamilaroi
.400 member

Reged: 18/12/04
Posts: 1803
Loc: sydney, new south wales, Austr...

Re: Old rifle cleaning rod thread size??? [Re: Watson577]
#146333 - 21/11/09 09:16 AM

COuld be a Cycle Thread.

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Gadge
.300 member

Reged: 02/05/04
Posts: 130
Loc: Gippsland, Victoria, Australia

Re: Old rifle cleaning rod thread size??? [Re: kamilaroi]
#146584 - 24/11/09 09:38 PM

Nope, it's a non-standard one. From back when standardised screw threads were a novel idea!

0.200" major diameter, Whitworth form [55deg, radiused crests/roots], maybe 26 tpi IIRC, as for BS Brass threads.

BSCycle thread form is 60 deg.

--------------------
Cheers,
Doug

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