Jump to content

M2 Tactical Receiver Plug Screws


CTNZ

Recommended Posts

Hi All,

 

I have a M2 Tactical which has 4 holes drilled in the receiver for a weaver rail and another couple of holes for the rear ghost ring sight. I'm wanting to source some plug screws for these holes for when I swap out the barrel to a field one for duck shooting.

 

Currently the 4 holes for the rail have the plastic plugs in them from the factory but i'd still like to get actual plug screws in case I use a rail at some point then want to remove it. According to this thread the holes on an M4 are metric M4x.75 not SAE #8-40. Is this the same for the M2? And also are the two holes for the ghost ring sight the same size as the 4 for the rail?

 

Has anybody found a source for plug screws that are the correct size? I sent Benelli CS a query about this and asked for exact thread size and whether they have plug screws and all I got in response was "Most people will use a crew and grind it off flush on the inside." Which didn't really answer any of my questions. You would think they would stock these screws.

 

CT

Link to comment
Share on other sites

Update: I probed Benelli USA a bit further and asked "Do you know the exact thread size/pitch of the mounting holes on the M2? If I know that I can make my own plugs from screws."

 

Their response was: "We use the 8-40 threads"

 

I'm not sure if the CS rep is saying that the threads in the M2 reciver are actually 8-40 not M4x.75 or that they just use 8-40 plug screws. It would be good to have a definitive answer so i've sent a query to Benelli Italy.

 

CT

Link to comment
Share on other sites

Both screw sizes work if those M2 receiver holes were factory and not uncertain aftermarket installations. There is only 0.0065" of a major diameter difference between the 8-40 and the M4. The .75 pitch and 40 tpi are also virtually identical. It is one of few size instances where metric and UNC/UNF are interchangeable for all practical reasons. I have used both in the receiver holes.

 

You can get the 8-40 plug screws @ Brownells.

 

https://www.brownells.com/gunsmith-tools-supplies/small-hardware/metal-screws/plug-screw-kit-prod792.aspx

 

Unknown2 copy.jpg

Unknown copy.jpg

 

These are factory screws from years past.

DSCN3229 copy.jpg

Edited by benelliwerkes
Link to comment
Share on other sites

Thanks for your response benelliwerkes. I just received a response from benelli Italy and they said the factory holes in my M2 Tactical receiver are in fact 8-40 NS2. I'm not sure what the NS2 stands for. That goes against the reports i've read in this forum that they are M4 x .75 although those claims were in regards to a benelli M4 not an M2. Maybe they are different or maybe they have recently changed to 8-40 as those screws are more common...

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Unfortunately, your content contains terms that we do not allow. Please edit your content to remove the highlighted words below.
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...