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Thread: Help How do I determine whether a Remington700 CDL has a UNS 8-40 thread size

  1. #1

    Help How do I determine whether a Remington700 CDL has a UNS 8-40 thread size

    As it says in the question. Looking at new bases and - bugger me - they want to know the thread size of the receiver. What is UNS 8-40 and how do I know that I've got it? All help kindly appreciated.
    Cheers

    John

  2. #2
    Remington standard thread for mounting a receiver sight or scope is 6-48.
    Some folks drill them out and retap to 8-40.
    To check, just go to a gun shop, where they will have a box with an assortment of screws, and can gently try a 6-48 and 8-40.

  3. #3
    Quote Originally Posted by Southern View Post
    Remington standard thread for mounting a receiver sight or scope is 6-48.
    Some folks drill them out and retap to 8-40.
    To check, just go to a gun shop, where they will have a box with an assortment of screws, and can gently try a 6-48 and 8-40.
    Thanks a lot Southern. The one I am looking at was bought new with the same owner since then, there's been nothing done to the gun, so I am thinking it will be 6-48. Cheers John

  4. #4
    Distinguished Member Ronin's Avatar
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    If its standard, it will be 6-48 thread, don't forget the forward most screw is shorter than the others.

  5. #5
    Quote Originally Posted by Redmist View Post
    If its standard, it will be 6-48 thread, don't forget the forward most screw is shorter than the others.
    Cheers, will keep that in mind.

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