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

 

[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

 

[telectrix]

yep. with a dartboard attached.

 

[UNG]

I'll have to have a root through my old tool boxes got a BA socket set somewhere

 

[Engineer54]

i still got BA taps and dies from schooldays.

Yep, totally forgot about them. Mine came in a wooden manufacturers box, pretty sure one of the tap's got lost though!! Can't remember exactly where i acquired mine from, but it'll be a good chance of it being my late electrician uncle that i used to go out working with after school and weekends... Still got the ''Megger'' (somewhere) he gave me!!!

 

[Knobhead]

Open, ring and box spanners along with taps and dies plus a BA socket set. They’re all somewhere in one of my big tool chests. Not seen the light of day in years, mores the pity.

Never did find a use for the 9-11 spanners. With my eyesight now I’d have a job to even see an 11BA nut!

 

[davethsparky]

I've got my grandads box of taps and dies i'm slowly sorting through. This includes some whitworth taps dated 1939 and a couple of left-handed whitworths.

 

[Guitarist]

Funny that America still use "English" sizes...

 

[ipf]

Funny that America still use "English" sizes...

Aye, that's one thing they have on us. :icon9:

 

[telectrix]

we do slate the yanks all the time. but at least they have the intelligence to multiply and divide be numbers other than 10, which is all the eurupean trash can manage.

 

[Chalkperson]

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

 

[Chalkperson]

It is definitely BA! I used the brass ones a lot in the Steelworks. They came in 0BA (biggest), 2BA (commonest), 4BA, 6BA, and 8BA. Never heard of an odd number size. Hope helps!