Old imperial conduit box lid screws

[Aindowsimon]

Any one know the size of the old imperial conduit box screws ?? I don't have callipers. They look to me like 5/16" screws any help appreciated

 

[Anthony King]

2ba i believe mate

 

[Aindowsimon]

I was tolled in work they were called 2bz. No joy on eBay il try urs now thanks

 

[snowhead]

Definitely 2BA

 

[Marvo]

Maybe just run them through with an M5 tap?

 

[Anthony King]

They are still fairly easy to get a hold of, cef sell them

 

[Guitarist]

Obviously a new pup

 

[Anthony King]

Obviously a new pup

Yep, i must admit though i once upon a time had to ask as i was taught in the "m4" era,

Thats whats its all about though, the only stupid question is the question not asked, well that and all these shed supply questions anyway

 

[oldtimer]

Maybe just run them through with an M5 tap?

Well said that man as there is 2 ie 2BaA and 3/16 and as Marvo said get a M5 tap as you should have a set of taps and a dwang as they call it up here I carry 3.5mm 4.0mm 5.0mm and a bag of 5mm screws.

Just to add I do a lot of repairs so work in a lot of older houses with conduit that is also the main earth so I have seen wood screws jammed in the holes and rarely have I seen 2 screws in any conduit box hence why I tap them out to 5mm All sparkies should have various taps in their toolkit

 

[Marvo]

I have seen wood screws jammed in the holes and rarely have I seen 2 screws in any conduit box

This was also my line of thought. Usually when you go to the trouble of sourcing the correct imperial threaded screws you'll just find you're no better off because some animal has previously forced an oversized self-tapper into the hole.

Not sure what a 'dwang' is but I assume it's a tap holder. If it's on site and easily accessible I usually just use my small battery drill or I have ratchet tap-holders if it's in the workshop.

 

[Gcolly]

Defo 2ba mate

 

[Gcolly]

If you ever get stuck with ur usual wholesalers for strange screw sizes RS always have it and they take cash or card these days so you don't need an account.

 

[oldtimer]

This was also my line of thought. Usually when you go to the trouble of sourcing the correct imperial threaded screws you'll just find you're no better off because some animal has previously forced an oversized self-tapper into the hole.

Not sure what a 'dwang' is but I assume it's a tap holder. If it's on site and easily accessible I usually just use my small battery drill or I have ratchet tap-holders if it's in the workshop.

Yep Tap holder is called a dwang up here as in Tap n Dwang lol and I have had my dwang for 38 years so as Trigger say look after your dwang..........................................

 

[Marvo]

Lol, sounds like a made-up Geordie word to me

 

[oldtimer]

Lol, sounds like a made-up Geordie word to me

Na just live in a different country with no Part P!sh

 

[Engineer54]

Now that brings back memories!! The old brass BA was a damned good system. Still have a complete sets of BA ring, open jaw, and box spanners somewhere!!

 

[ian.settle1]

Now that brings back memories!! The old brass BA was a damned good system. Still have a complete sets of BA ring, open jaw, and box spanners somewhere!!

Snap mine are somewhere in the garage

 

[telectrix]

i still got BA taps and dies from schooldays.

 

[Knobhead]

Just for information on imperial conduit (doesn't include assesory screws)

Thread Data Charts

 

[oldtimer]

i still got BA taps and dies from schooldays.

Yea along with your chalkboard lol