There is no pin as far as I know. The nut has the 2 “notches” you describe which requires a spanner socket to remove the nut without damage. They are usually on fairly tight and the threads are very fine. I had to make a proper sized spanner socket to make the job easier, it is simply a standard socket the same diameter as the nut that I milled down and left 2 protruding tabs to engage the notches in the nut. It still says “Craftsman” on the side but I think I voided the lifetime warranty 😉
Without a spanner tool they are a bear to get apart without damaging anything. I guess my question is why do you need to take it apart?
Thanks JWA. Maybe I’m confused. I just bought this rifle a short time ago. I’m trying to separate the magazine tube from the butt plate. The original butt plate is quite rusty and pitted. Otherwise the gun is in excellent condition. I purchased an excellent OEM butt plate to replace the pitted one. My understanding is that the nut needs to be taken off to separate the tube from the butt plate. If this is correct, I don’t see how I could use a spanner socket with the tube still attached. I must be missing something…
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That would be awesome!
I’ll check back tonight.
Keep soaking it in Kroil in the meantime, if the butt plate was rusty it is likely the threads may be rusty also.