I guess there is always something new to learn.
I have learned a lot buying odd ball stuff on eBay for super cheap.
Did it again.
This is it.....
1/8-40 thread grub screws.
I had never heard of such a thing. I thought "it must be a typo or Chinese to English confusion". So I figured "it's gotta be actually 8-40 threads like the standard scope mount screws we are all familiar with. Around a buck for a package of 20 screws so I pop for it...Turns out they ACTUALLY ARE 1/8-40 screws. Are you kidding me? Spent a half hour trying to research such an odd ball size. NOTHING. So I go back to eBay and look for more screws, taps and such (now I need a 1/8-40 tap)
Turns out for you folks "across the pond" who are laughing now...It is BRITISH STANDARD THREADS.
I don't know if they use it much anymore, but, sure enough there it is.
NOW, because of the price of this stuff... Less than $2.00 for a tap (I ordered 3 of em) and a little over a dime a piece for all kinds of various length cap screws...I am now a happy user of BRITISH STANDARD THREAD SIZE 1/8-40.
By the way it is just a tiny bit bigger than 6-40 which is actually a nice fit for a lot of stuff that I do. But I pity the person who tries to work on the stuff I make with these....I might have to include a note on everything warning them of this ODDBALLIUM.