Dyna coil screw size

[skinnyZED]

Hello all,
Is anyone able to confirm what size/thread these screws are please,
See image, the 2 screws in each dyna coil,
I have either lost mine or never had them.
While searching the forum for a answer I came across this image so thanks and apologies for pinching it.
They seem to be about m5 but not quite!
Thanks in advance
Stuart

[Kev1R]

Took the screw out of a disused green dyna coil and inserted a screw which I am pretty sure is m5. (KH400 switchgear screw) So you should be ok with m5 replacement - you should also use a split washer. For info the threaded section is about 8mm and the head of the screw is quite wide at about 9mm. Doubtless someone will be able to confirm.

[skinnyZED]

Great, thanks for checking,
I didn’t want to mess up the thread by forcing a wrong screw in.

[Gus]

Not M5 they are Yankee imperial.

But I can't remember what size at the moment

Gus

[zed1015]

They are imperial 10-32 x 5/16 UNF.

[Gus]

Beaten to it.

10-32 x 5/16 UNF pan head screws

I have some here but they are longer and they would need cutting down to length if you want some?

Gus

[skinnyZED]

Perfect,
Thankyou for the confirming, and appreciate the offer Gus,
I am pretty sure I have some screws of that size somewhere,
I knew m5 felt almost right !!!
Cheers,
Stuart

[Kev1R]

Very surprised at that - the M5 fitted absolutely perfect for the whole length.

[chrisNI]

Very surprised at that - the M5 fitted absolutely perfect for the whole length.

I had a pair with no screw and m5 also fitted perfectly whole length. What is the difference in pitch in m5 and this is thread?

[r3sc]

A number 10 screw has a theoretical diameter of 4.82mm and a pitch of 0.793mm so it’s slightly smaller than M5 in both diameter and pitch.