Plugging screw holes

Discussion in 'Gunsmithing' started by aitch, May 4, 2011.

  1. aitch

    aitch Well-Known Member

    Messages:
    84
    Joined:
    Sep 23, 2007
    I have a Martini cadet with two mounting holes on the left side of the receiver where a receiver peep sight was mounted. Actually there is a bar affixed to the receiver by these two screws. I plan to fill these holes and am needing a couple of screws to accomplish this with.
    I want oval head screws so I can chamfer the mouth of the holes to accept the bevel at the base of the oval head screws. I plan to anneal the screws and then peen them in place after adjusting the length and tightening. Then file and dress them down to a flush condition.
    My quandry is that I don't have the sacrificial screws and am unsure of the thread.
    It is a number 6 but I don't know if it is 6-40 or 6-48, I suspect the latter.
    I have some scope base screws that mate with the thread but have wrong head configuration.
    If someone can confirm the thread pitch for scope base screws or suggest where I might get a couple of correct oval head screws, it will be a big help.
    Thank you,
    Aitch
     
  2. aitch

    aitch Well-Known Member

    Messages:
    84
    Joined:
    Sep 23, 2007
  3. aitch

    aitch Well-Known Member

    Messages:
    84
    Joined:
    Sep 23, 2007
    If no one has any screws, can someone confirm the thread for me. It's 6-40 or 48 and the thread is the same as scope base threading in a Ruger #3.

    Thanks,

    Aitch