Hinge Machine Screw Won't Budge

Old 04-05-22, 07:16 PM
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Hinge Machine Screw Won't Budge

I was trying to replace this door hinge, but the circled screw won't budge and now the head is buggered to boot. They are machine screws going into a metal jamb.

So how do I get this out now? --Preferably without messing up the machine threads of the door jamb.


Old 04-05-22, 07:27 PM
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You'll need to get a screw extractor set. If you had a Dremel you could probably cut a slot across it and maybe use a flat screwdriver, or an impact.

Those screws are often #3 phillips. If you're using a #2 bit that will usually bugger them.
Old 04-06-22, 08:09 AM
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Those are probably 4" hinges and a #2 Phillips is the proper size. 4 1/2" hinges use a #12 screw which definitely uses a #3 Phillips. Bit size is more important than you would think.

You can take a scratch awl or sturdy ice pick and working around the outer perimeter of the screw head, use a hammer to create a dimple in the screw head, then angle the awl to drive the screw counterclockwise with the hammer

When trying to remove any machine screw that doesn't break loose immediately, set the screwdriver in the screw, apply turning pressure with one hand and smack the daylights out of the head of the screwdriver with a hammer. Once is often enough to break a recalcitrant screw loose.

EDIT: For some reason unknown to me, 4" hinges usually take a #9 screw. Oddball size!
Old 04-06-22, 04:46 PM
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Try making a cross a little bigger than the damaged cross in the screw-head using a small chisel. Use a hand impact tool with a best fit Phillips tip to try loosening the screw. You must hold the hand impact tool firm or the hammer impact will turn the wrong half of the impact tool.
Old 04-07-22, 08:06 AM
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Old 04-07-22, 09:43 AM
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I have an impact driver like the on Joe left a link for - they work well. I usually drag mine out if I think the screw is going to give me issues, before I bugger up the head too much. But they usually still work with a chewed up screw head.

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