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What screw is this ?
2

What screw is this ?

What screw is this ?

(OP)
Hello :)
Do you maybe know what type of screw this one is ?



RE: What screw is this ?

(OP)
Yep, forgot to mention that he diameter of the thread is 2mm. How can I find out if these are metric or imperial ?

RE: What screw is this ?

Buy a stock plastic or aluminum thread gauge and see which pattern fits the threads on the screws you have in hand. Buy both a metric and an imperial gauge to be sure to accurately size them up.
Dave

Thaidavid

RE: What screw is this ?

They are quite similar to those used in household electro, where the screw screws into a hollow plastic tube and "taps" its own thread in the soft plastic.

RE: What screw is this ?

Those could be PT screws: http://www.ejot.com/Industrial-Fasteners-Division/...

If they are not PT thread form, then the question about metric and inch is moot. The standard sizes for tapping screws like these are 2.9 mm, 3.5 mm, 4.2 mm, etc. These correspond with inch sizes 4, 6 , 8, etc.

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