What size screw is this?

[AndyP]

I’ve totally buggered the head of one of the two screws I need to attach a salt/pepper grinder mechanism.
Sorry to mix measurement units. That’s 15mm by, I think 2.4mm.
Next task will be to try and find some.

 

[Woodbloke]

I'll have a delve into my screw tub and see if I've got anything - Rob

 

[Dr.Al]

Wood screws (and other self-tapping screws) often seem to be imperial sizes reported in metric units and 2.4 mm is fairly common. The ones you tend to get in the UK are often reported as #2, #3, #4 etc and #3 is 2.2 mm and #4 is 2.9 mm although I've seen some places list #4 as 2.4mm. An imperial wood screw of 3/32" (2.4 mm) would be ideal if you can get it, but probably not that easy in France.

For the length, you'll probably find 16 mm easier to find than 15 mm (as 16 mm is roughly 5/8").

I'd be inclined to get a 16 mm long #3 (2.2 mm diameter) as it'll be close enough. I'm not sure whether they'll be listed as #3 in France or just as 2.2 mm.

Handy reference: https://www.aspenfasteners.com/content/pdf/Metric_DIN_7981_spec.pdf

 

[AndyP]

Thanks Rob, I’ve scoured all my tins and even the dark recesses of my toolbox where all sorts have been chucked in over the years.

This size seems more common as a machine screw than a wood screw and although I can find boxes of 100 woodscrews none are pan headed.

Here are the holes. There is no room for error if the screw is too big

 

[Malc2098]

These any good?

They're the only four I've got, but you're welcome to them.

 

[Dr.Al]

This size seems more common as a machine screw than a wood screw and although I can find boxes of 100 woodscrews none are pan headed.

Self-tapping metalwork screws would do the job just fine if you can get them more easily.

 

[AndyP]

I think I’ve found something. The screw that holds together what passes for a plug on this side of the channel, although with a chunky head, fits.


It’s the one on the right


I’ll sit and look at that for a while before I decide whether or not to replace the other one.

 

[RogerS]

Sorry but I couldn’t live with that style of replacement screw.