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  #1  
Old 01-28-2019, 04:25 PM
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Cadet Forend



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Can someone tell me what the pitch is on a cadet forend attaching screw. I don't know what model it is. The only thing on the receiver is s stacked arms stamp on the left side. Thanks, Wayne
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Old 01-28-2019, 08:18 PM
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I assume you are talking about the model 12/15. Cadet rifles do not have a screw.
The 12/15 screw is a British thread about 1/4 X 25 or 26. You can run a 1/4 X 28 tap in it and use a common bolt.
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Old 01-28-2019, 09:12 PM
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The international models use a 1/4-26 screw and one on those only goes in two turns. A 1/4-28 screw goes in 3 turns before it stops. It looks like the threads are finer than that but I'm not real sure. My pitch gage is too large to get in the hole so I have to guess. I haven't tried any metric screws, one of those might work. Still poking and hoping. Wayne
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Old 01-29-2019, 12:42 PM
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You can press some modeling clay into the threads and then measure the threads on the clay.
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Old 01-29-2019, 04:20 PM
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I don't have any modeling clay. I do have some kids play dough but experience tells me that doesn't work very well. May have to try cutting a wooden plug slightly oversize and try screwing that in. Might get me close. Wayne
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Old 01-29-2019, 07:09 PM
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Can someone tell me what the pitch is on a cadet forend attaching screw. I don't know what model it is. The only thing on the receiver is s stacked arms stamp on the left side. Thanks, Wayne
I would assume that the fore-end is off the rifle? Just take it to a hardware store and try fitting several bolts to get one that works. And then, go from there.
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Old 01-29-2019, 09:04 PM
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Thanks but can't do that. It is the barreled receiver pictured in the other thread. Could get into trouble just walking into the store with it in my hand. I've tried
1/4-26, 1/4-28 and 1/4-32 so far and non worked. I thought it would be 1/4-26 like the internationals, but NO it isn't. I'm not quitting til I find out. Wayne
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Old 01-30-2019, 09:57 AM
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Lion, I see you are in North Dakota. Take your gun with you to the hardware store and leave it in the car. Ask the clerk If you can bring it in to check the screws.

Bet he says OK.
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Old 01-30-2019, 10:27 AM
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Whittle a squarish hardwood plug to screw into the hole, the corners will impress to the threads much easier than trying to use a full dia. plug. You can get a good read on the pitch that way, and for technical purposes knowing is useful, but for practicality you can get a very good sense of the screw to hole fit by actually trying screws.
Btw, with a good quality screw of a hole filling dia. 3 full threads is quite good, or use the old 'depth of the dia.'rule of thumb.

Last edited by gcrank1; 02-01-2019 at 10:39 AM.
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Old 01-31-2019, 11:43 PM
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Buy a thread-pitch gauge.
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Old 02-01-2019, 05:07 AM
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Originally Posted by rapidfire10ring View Post
Buy a thread-pitch gauge.
I have a thread pitch gauge that goes from 6 to 50 but the ends are to large to get inside the hole. I'm tempted to grind the ends down but can't bring myself to do it. Thanks, Wayne
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Old 02-06-2019, 11:10 AM
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I messed up when I checked the threads. I used a tapered tap to check and it bottomed out at 3 turns. a 1/4-28 screw turns in all the way to the bottom. Since it works someone must have already run a 1/4-28 tap in it. Now I know what to use after I make a fore end for the 12/15.
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Old 02-06-2019, 12:18 PM
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I messed up when I checked the threads. I used a tapered tap to check and it bottomed out at 3 turns. a 1/4-28 screw turns in all the way to the bottom. Since it works someone must have already run a 1/4-28 tap in it. Now I know what to use after I make a fore end for the 12/15.
There are already makers of the fore-ends of the 12/15 that supply them to the public. The one I bought took quite a bit of hogging out of the channel, but it was well otherwise.
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Old 02-06-2019, 01:56 PM
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Pm me with your e-dress and I can send you pics of the extra custom fore end I have.
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Old 04-23-2019, 07:06 PM
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I'm thinking the correct thread may be an Enfield Lock proprietary one. The front trigger guard screw from an SMLE goes nicely into two 12/15 barrels that I have. 1/4-30 with a special thread form. Wouldn't be a big surprise considering BSA's involvement in manufacturing Lee-Enfields.
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