Instrument head screws ?

Do a search for Raised Head Countersunk, I Googled a couple of pages of hits, mostly metric. I hate to say this, but at a push you could perhaps use M5 for 2BA - yeah horrid I know, but ports and storms etc.

Richard

...or even 3/16" BSF, which is probably closer though maybe no easier to find.

Tim

Try

BA was obsolete in 1965 or 66 i think, havent specified any on drawing at work since 1976 so i would expect they are getting rare.

Steve Larne

-- SD

----------------------------------------------------------------------- SDL's Profile:

We still use BA on transformers, and things like the Red Spot fuseholders which won't take the head of an M5 screw as the moulding was designed for BA.

We have 2BA in cheeeseheads X 1/2", about 4000, as we did a bulk buy for the fuseholders, but the raised countersunk one is/was peculiar to the 19" equipment rack world and equipment that was made in Admiralty Grey BS381C Shade 687.

I've got something in the workshop with a load of chrome BA stuff in it, but I'll have to find it first and have a look through. No promises.

Peter

-- Peter & Rita Forbes Email: snipped-for-privacy@easynet.co.uk

Looks like we have the real item....

Chrome-plated 2BA X 1/2" Raised Countersunk Slotted screws.

OD is a bit down at 0.180" overall length including the head is 0.535"

We have 50+

Peter

-- Peter & Rita Forbes Email: snipped-for-privacy@easynet.co.uk

Hello. try thes

-- Nouris

----------------------------------------------------------------------- Nourish's Profile:

I have no problem getting BA screws, studding, taps and dies, though I must admit I have not seen chromed screws. I use BA all the time in preference to metric and BSF sizes for clock work.

Cliff Coggin.

Thanks to all who responded, and especially to Peter - thanks to whom I now have the exact item!

Jim Hawkins