Thread tap to use for plugging VASA holes

[Knuckle Dragger]

What size tap should I use to thread those 2 small holes in the body? Looks like 10-32 tap will work, but might be too loose. I want to make a delrin guide/cover/thing for the cocking solenoid wires, and need to plug those holes.

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the vasa centerbolt thread should be 1/4-28. the plugs i have used had dowels in the holes north and south of the center bolt and an oval shaped oring for sealing

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picture
http://imgur.com/gallery/AtCtAiF

[Knuckle Dragger]

I’m good on the bolt thread and you’re right about it being 1/4-28. I want to plug the 2 small holes with sealed grub screws and 10-32 is too small. I have an ID plug, but the solenoid wire just flops around and looks out of place. I have some delrin I’m going to use for a cover and don’t want to rely on plastic to seal everything. I plan on using a 1/4-28 bolt backed with o-rings to handle the sealing while securing everything and the front block will prevent everything from twisting. Hope this makes sense to why I’m going this route.

[cash monet]

Without calipers handy, i cant lead you in the right direction. I now see where you are going with this and it makes sense, I just dont have any data on the other 2 hole sizes to give you the right advice. Sorry for the confusion.

[Knuckle Dragger]

No confusion at all, I appreciate any and all input.

[Knuckle Dragger]

I decided to go ahead with using a 10-32 tap. The screws fit and should seal with some thread sealant. Here’s the almost finished piece I made to protect the solenoid wire and fill a void with the extended reach kit.

Now it just needs a polish to get a better shine.