Help identify a thread.

[Kent]

Looking to identify this thread for a repair. The overall diameter is 0.135" its not 3mm metric which will start but not clear through.
I think is ba but my zues don't give the overall size to identify
I found some new screws that fit and I suspect they are for a socket front seem to have them being ba normally?
It's not Whitworth already had a fail on that one thread marries up but too tight on the diameter

 

[rosinante]

BA threads are the British stab at metric , ie 0 BA is 6mm od, the thread form is 47.5 deg included angle , Whitworth is 55 deg most others are 60 deg in common. use, a search of the Web will readily ID the ba size, the sizes are numbered from 0 to 12, common source is electrical fittings sockets etc.
HTH
Chris

 

[brightspark]

yeas ago they were ba now there 3.5mm metric for sockets and switches

 

[Kent]

yeas ago they were ba now there 3.5mm metric for sockets and switches

3.5mm metric course would be 3.5 overall these read 3.34 on my vernier oa

 

[Kent]

yeas ago they were ba now there 3.5mm metric for sockets and switches

Don't know why I didn't try this earlier but yes it's sockets size. So 3.5mm metric course! Just took one out my home socket that was rewired about six years ago and tried it.
Just need to get a die for it now

 

[awemawson]

coarse

 

[Robotstar5]

coarse

of course

 

[Kent]

coarse

Spelling police alert ⚠

 

[brianblock]

 

[Kent]

It's sorted 3.5mm metric thanks to bright spark

 

[brianblock]

Just thought as you said your zues book didn't have the ba info I would share mine

 

[Kent]

Just thought as you said your zues book didn't have the ba info I would share mine

Yeah thanks was trying to do it of oa and mine lacked that information. All I had was what worked in the hole from my odds n sods box.

 

[awemawson]

Zeus