A&K SVD (pics added)

6316 Views 28 Replies 10 Participants Last post by ronin677, Aug 16, 2014

blackfoot1

Discussion Starter · Mar 2, 2011

I broke down my A&K SVD last night and found the hop up adjustment grub screw is stuck. The 1.5mm hex head on it has stripped (so the allen bolt just spins) and I can't get the little blighter out.
I reckon the only solution is to drill it out and tap the hole for a larger grub screw.

Here is my question-
The hole is 3mm (I think), do I use a 3mm drill bit and a 4mm tap or do I need to use a 4mm bit and a 4mm tap?
I will be using a hand drill and whatever set of tap and dies I can find on the net for cheap.
OR
Are both my suggestions totally wrong? If this is the case, lets hear from the experts please.

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hidden187

· #3 · Mar 3, 2011

blackfoot1 said:
Here is my question-
The hole is 3mm (I think), do I use a 3mm drill bit and a 4mm tap or do I need to use a 4mm bit and a 4mm tap?
I will be using a hand drill and whatever set of tap and dies I can find on the net for cheap.
OR
Are both my suggestions totally wrong? If this is the case, lets hear from the experts please.

So it is not that simple, I would first try the wax trick before you try and drill and tap something that small. But if you ask you will revive so here is a chart for metric and standered( US) http://www.kramerusa.com/DrillTapChart.htm . Also if you are doing that I would just change it to inch rather then met you will be able to find things easier at a hardware store i.e. home depot.

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