What screw is this ? 2

[cpper]

Hello
Do you maybe know what type of screw this one is ?

 

[KENAT]

Phillips pan head.

Thread looks like it could be a sheet metal screw.

Beyond that would require at least need a Sense of scale.

Diameter & thread pitch/threads per inch wild really help.

Posting guidelines faq731-376

http://eng-tips.com/market.cfm?

(probably not aimed specifically at you)
What is Engineering anyway: faq1088-1484​

 

[cpper]

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

 

[thaidavid40]

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

 

[kingnero]

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.

 

[CoryPad]

Those could be PT screws:

http://www.ejot.com/Industrial-Fasteners-Division/Products/PT<sup>&reg;<-sup>/p/VBT_PT

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.