I was repairing Sony headphones when I saw some screws were missing. As all screws were the same, I took off a non missing screw to see what size and thread it was.

I measured the outer diameter and it was 2mm. I measured the pitch and it was around 0.6mm. What standard is that? M2 would have 3 times smaller of a pitch. What standard is typically used in electronic devices? Where can I find this type of screw?

  • 1
    Is it screwed into plastic? These have coarse threads and aren't nearly as standardized as screws for metal.
    – Mattman944
    Nov 18 '19 at 10:38

The type of screw that you describe is a special design with a large pitch on the the threads to create its own threads in the mating plastic part. You can find these at McMaster-Carr or other specialty fastener supplier.

enter image description here

(Link to supplier page for 6mm length).

(Link to another supplier page for 6mm).

  • 1
    Known in the UK as "self-tapping screws". Nov 18 '19 at 14:48
  • Most the self tapping screws, as opposed to the thread forming type above, that I have used have either a notched cutting edge at the tip or are tapered at the end with thread all the way to the tip. Thread pitch is also much closer (less steep).
    – Michael Karas
    Nov 18 '19 at 21:08
  • Wood screws are like this; they are not standard-thread "machine" screws. It shouldn't matter too much if your replacement is exactly the same thread; repeated use of the same hole will gradually degrade holding power even with the same thread, in soft materials.
    – CCTO
    Jan 29 at 22:50

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