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Winchester 100 Forend Screw Size
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January 23, 2022 - 5:07 pm
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I’ve removed the Forend Swivel on my Model 100 243 Carbine. I hate sling swivels!! Without the swivel, I need a shorter screw to go through the barrel band only. I cannot seem to find the thread size for that screw. Would anyone know the correct thread? 

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January 23, 2022 - 8:37 pm
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The forend swivel stud thread size is .185″-35-1/2 tpi. This is a special, non standard thread as are most Winchester screws. This is the same thread as the forearm attaching screw used on a model 70, 52 Sporter and probably others. You could probably modify one of those to work for your plug screw. An easier choice might be to remove the threaded escutcheon from the barrel channel that the swivel screws into, and replace it with a #10-32 nut and screw of your choice. These are the same diameter as the Winchester swivel stud, are a standard thread profile and available in a multitude of configurations at any hardware store. A simpler solution yet is to just find a #10 screw you like and trim it to length, then just put a dab of glue on it to hold it in the stock forearm. Really no need for a nut behind it.

Steve

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January 23, 2022 - 9:16 pm
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Great! Thanks so much.

I know that screw is not necessary but it looks odd without something there.

I like idea #2.
Perhaps if I remove the threaded stud from the barrel, I might simply rethread it for a standard thread. I can get an oval-head screw to fit and blue it. 
That would look good and secure the barrel band too.

I appreciate your help.

Alec

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January 24, 2022 - 7:18 pm
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Wisners has them for $5. They are good source for all old Winchester parts. Today’s terminology is a 10-36. 

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January 24, 2022 - 9:55 pm
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Thank you. 

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