(?) Looking for LONG screws for electrical knockout boxes.

[Dave Chapman]

Can anyone tell me where I can obtain half a dozen LONG (>60mm) screws, preferably countersunk headed, with either a 3mm or a 2BA thread, such as those used to fix mains sockets to a knock-out box in a deeper-than-normal wall?

I've looked in the Farnell, CPC, and Screwfix catalogues but don't see any listed amongst the regular screws being offered or amongst the various electrical mounting boxes.

TIA - Dave.

[Tim Watts]

On Saturday 28 December 2013 10:13 Dave Chapman wrote in uk.d-i-y:

ITYM M3.5 - or are these very old boxes?

^^ 60mm long - does that help?

[The Medway Handyman]

TLC Direct do 75mm ones;

Or

MK Extension Stud M3.5;

[The Medway Handyman]

TLC Direct do 75mm ones;

Or

MK Extension Stud M3.5;

[Dave Plowman (News)]

The thread used since the '70s is 3.5mm.

Any decent electrical wholesaler will have them. Like TLC.

Or Ebay - this seller does a variety of sizes and quantities.

[Dave Chapman]

Very many thanks for the speedy responses and helpful information supplied. Much appreciated.

I don't actually need the screws to fit to a conduit box but I do have a couple of the long screws I mentioned and needed a few more of similar shaft thickness in order to mount some handles on either side of a rather thick wooden door. The actual thread doesn't matter as long as its around the 3mm or 2BA that I quoted.

Happy New Year.

- Dave.

[DerbyBorn]

The Medway Handyman wrote in news:vMxvu.57$ [e-mail]:

I like the studs! However, I suppose when things get to a certain point then putting a spacer behind the box - or fitting a deeper box would be the "purist" way of doing it.

[The Medway Handyman]

Very useful when walls have been tiled.

[alan]

You need to look for 3.5 (m3.5) screws. I've purchased the before from CPC

Toolstation do 50mm and 75mm @ £2/3 per hundred

Screwfix call them "m3.5 electrical screw" they also do 50m and 75mm but more expensive than toolsatan

[PeterC]

Are you sure about the diameter. The old handles on my front door were M6; the new handles are M5 - I'd have preferred the M6 for the new ones but they seem to be old hat now.