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Discussion Starter · #1 ·
While messing around with my Marlin 336 I lost one of the screws for the front sight. I tried a thread gauge on the remaining screw but no SAE thread fit. The best fit I could find was a .5 metric. This gun is from 1968 I refuse to believe they used metric fasteners. Perhaps the threads are just misshaped from years of abuse.

Does anyone know what thread the front sight mounting bolts are?

Thanks,
neilca
 

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Off hand I dont know, but theyre not metric. I'd just go to Brownells or Midway & order one. Theyre all the same until recently & the new screws are the same thread, just a different shaped head.
 

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My thread pitch gauge doesn't go that fine, but I want to say they are #6-48?, I need to fix one of the holes on my 1894.
 

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.

In thirty years I have never removed a front sight. No reason to do so. OK, I'll see what I can find.

I found that it is smaller than a 6-48, maybe a 4-48? It is a special screw made for the Marlin sight. Good luck finding one.

.
 

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The one on my 1894 is a #6, my wire crimping pliers have screw cutters on them and the screw will start in the 6-32 cutter and binds after about half a turn, it WILL NOT start in the #4-40 cutter, so they are a #6 NOT a #4.
 

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I wanted to say 6-48 before but I'm not sure, that might be scope holes or reciever sight holes. The guns with only one screw may be different, some have two with one under the sight for some stupid reason.
 

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The front sight ramp screw and the receiver sight screws are 6-48, while those drilled and tapped on the receiver for scope mounts is 8-40.

I've never seen one with a size #4 screw for anything.
 

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Discussion Starter · #9 ·
Thanks for the replys. Midway had them. I like this, working on a gun you can actually buy parts for.
 
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