Stuck Winchester M12 Carrier Plunger Screw

[freedom-lover]

Any suggestions how to remove this stuck screw? Yes, it is RH thread. Yes, the edges were staked at the edge, but when removing a screw that is staked you just exert sufficient torque, right?

[Pofoo]

Well, since you haven't gotten any answers from any of the experienced members here, I'll tell you what I'd do.
Try to clean up or remove the staked material. Maybe a small chisel?
Use penetrating oil. Kroil is the best that I've used, but use what you have and let it sit. Heat and wax is supposed to work well.
Try alternating heat/cold. Stove and freezer if you don't have anything else.
The main thing is to get the part immobilized--in a vice or clamped--and a lot of pressure to keep the screwdriver from lifting up and out.
Have a drill press? You want to get a lot of pressure on your screwdriver. Chuck up a screwdriver--cut off the handle if you don't have anything that will fit the chuck. Then apply pressure as needed and turn the screwdriver by hand. Use pliers, pipe wrench, of file flats for a crescent wrench.
Depending on what tools you have, you may have to improvise.
Does that screw go though the big part?
As a last resort, you could drill it out from the back?

[kendog4570]

Why are you removing the screw? Is the plunger stuck or otherwise malfunctioning? That particular screw is rarely removed except for plunger service. That is why they staked it.
If you have to remove it, making a screw jack out of a drill press/vise/good fitting screwdriver is about the best way to do it.

[freedom-lover]

Thanks guys. Yes, I tried Kroil oil. I like the drillpress idea and I will chuck up one of the gunsmithing screwdriver bits and try that. Why remove it? The plunger/spring/screw came with a M12 replacement parts kit and there was some wear on the plunger anyway, so I figured I would go ahead and replace it.

[xsefan]

Remove the staking then in the freezer over night then let it come up to room temp or set it in the sun. I have had good luck with the freezer trick. Remember it was staked for a reason so you must be able to re stake that screw when it's going back together. That mean good support be hide the part or something could bend. If that happens check out numrich