Castle Nut and Wrench Don't Match?

Discussion in 'AR-15 Discussion' started by rccalzadilla, Sep 1, 2011.

  1. rccalzadilla

    rccalzadilla New Member

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    Last edited: Sep 1, 2011
  2. Quentin

    Quentin New Member

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    Just to be sure, you are testing the wrench on the side of the nut with the large notches?

    I would expect the DPMS wrench to be ok so it's probably the UTG castle nut. Can you check the wrench on another AR? Someone else a while back had trouble with the sizing on a UTG stock kit. Don't remember if it was the castle nut though.
     

  3. Snakedriver

    Snakedriver New Member

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    RC, the castle nut has notches on both sides. The small ones are for staking the nut to the receiver. The other side has the notches that the wrench fits into. Is it possible you have the castle nut turned around backwards? The wrench you have bought should work. I have the same stock and a similar wrench and it went in great.

    Here's a picture, notice the bigger notches are on the rear of the nut facing the back.

    [​IMG]
     
    Last edited: Sep 1, 2011
  4. rccalzadilla

    rccalzadilla New Member

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    Snakedriver:
    Yes, I noticed that and I have the correct side and orientation of the castle nut, that is, the larger notches face rearward on the stock.
    I removed the castle nut and carefully aligned wrench and nut to study them and, no way, the castle nut notches are slightly smaller. Smaller by perhaps 1 to 1.5mm in each and everyone of the three notches that the tool must engage.

    Perhaps I could file down each notch with a little flat file but, I don't know.
    Can you tell me the type of wrench that you have? Does your wrench engage three notches?
    Thanks for your reply.
     
  5. Snakedriver

    Snakedriver New Member

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    RC, I bought the Rock River Arms wrench from Joe Bob Outfitters when I bought my LPK and other parts for my build. Yes it engages all three notches at the same time.

    Here's a link for the one I bought. Joe Bob's has super fast shipping.

    Tactical CAR Stock Wrench
     
  6. MLRDist

    MLRDist New Member

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    Could it be that the coating on either the wrench or the castle nut was applied thicker than usual or thicker even on both? I would think that I would much rather have shinny on the wrench then the nut from filing! Have you checked the wrench with other castle nuts? I do know that every manufacturer is slightly different from the other so you will have variations!

    Just some thoughts.

    Mark

    MLR Distributing
     
  7. Snakedriver

    Snakedriver New Member

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    I agree, I think I'd file down the lugs on the wrench before I'd file on the castle nut.
     
  8. rccalzadilla

    rccalzadilla New Member

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    OK. Under closer scrutiny with a brighter light, it's evident that the notches are indeed narrower but it may be from the coating.
    On the wrench I can see also one shoulder sticks out more than the others and could also be the coating.
    I am going ahead and fix the wrench and then fix the nut and let you guys know how I did.
    thanks
     
  9. rccalzadilla

    rccalzadilla New Member

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    OK. All is well!
    Had to work quite a bit on the wrench with a flat file and my trusty old Dremel with a cylindrical sandpaper tip for the rounded areas. The fingers on the wrench and other surfaces had interference material, for sure. Some of this areas had linear gauges from manufacture tooling.
    Finally for not too tight fit, filed down just a little of the coating on the castle nut notches.
    Torqued the tube no problem.
    Now the tool works fine.

    What I need now is to replace the finishing material I took off.
    Suggestions please?
     
  10. rccalzadilla

    rccalzadilla New Member

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    Snakedriver, I paid $27.99 plus shipping for my wrench you paid $5.95 plus shipping for yours.
    What's the lesson here? :eek:
     
  11. Car54

    Car54 New Member

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    Birchwood Casey Matte Black touch up paint. Local gunshops, large sporting goods stores near you (Cabela's, Dick's, etc:) or order online from PSA or other vendors. Should be about $6.
     
  12. MLRDist

    MLRDist New Member

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    Glad to see everything worked out for you. You paid the price you did for the wrench because of the name "DPMS"! I am not sure what they coat it with so I really cant tell you how to touch up. If your nut is scratch try a black touch up pen from Birchwood Casey. They seem to work pretty well. Or you can just purchase another nut.

    Mark

    MLR Distributing
     
  13. Snakedriver

    Snakedriver New Member

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    The Birchwood-Casey touch-up pens work very well for me when I need to tough up the finish on non-blued gun finishes. They come in "flat" and "gloss" depending on your needs. I got mine at the Bass Pro Shop. I think they are about $7.50 ea..

    SUPER BLACK INSTANT TOUCH-UP PEN - Brownells
     
  14. rccalzadilla

    rccalzadilla New Member

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    Thanks for all the help.
    Next I will try to feed some ammo to see how they go into battery, before I go to the shooting range.
    I am supposed to clean off the grease that comes with the rifle and parts?