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I need to be able to insert an M1x2 slotted screw into a tapped hole upside down, and critically without dropping the screw. That rules out magnetic headed screwdrivers unless I can't find anything else.

I've seen some screwdriver designs such as this one from Wiha Tools (see p9) which would in principle work for larger screws, but apparently not M1:

Wiha screw holding screwdriver

I've got two problems:

  • I can't seem to find one small enough to work with M1 screws
  • I don't know the "standard term" used to describe these screwdrivers. I've seen "gripping screwdriver", "screw holding screwdriver" and others.

I think there must be some watchmaker's screwdriver that would work, but I can't seem to find any. Any help would be appreciated!

closed as off-topic by isherwood, ThreePhaseEel, Tester101 Feb 28 '17 at 14:50

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  • I don't understand - what is it about your requirements that rules out magnetic screwdrivers? – The Evil Greebo Feb 27 '17 at 13:15
  • Quite simply, I can't guarantee that the screw will be a magnetic material. It's for vacuum use use where cold welding can become a problem. We avoid using the same material for screws as we do for the thread. – Sean Feb 27 '17 at 13:37
  • there are some that have a spring loaded center section (2 types I know of) one the spring load makes an almost Phillips looking bit when not in a slot the center holds the screw in place while starting. the second is 2 pieces of metal that spread to hold the screw I have seen these in much smaller sizes but not sure about M1. both are for starting not for driving. – Ed Beal Feb 27 '17 at 14:03
  • @EdBeal, those sound promising. Do you know any specific models I could look at? – Sean Feb 27 '17 at 14:16
  • Here is a link to 1 type that may be small enough look for screw starter here is a link to the other type screw starter x. the second may be two large but provides an idea of what I was talking about. I also found this micro starter hope these examples help. – Ed Beal Feb 27 '17 at 14:33
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I managed to solve my problem by buying as small a gripping screwdriver as I could find, and sanding it down to fit the slot on my M1 screw:

Gripping screwdriver with M1 screw

Thanks for your help.

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