Oh my , lets not forget not forget good old metric , pitch , 1mm , 1,25mm 1.5mm and good old 1,75mm ,,,, .
Yes we can agree here that the standards in world wide threads are %$*! , but as I said its all to do with war , stops the enemy using your weapons against you .
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Doesn't really help us 'Joe Blogg's " here in amateur astronomy/ classic cars / / audio or any hobby that crosses the lines now does it ? .
Brian.
Quote:
Originally Posted by AndrewJ
Gday Brian
No they dont  ( i suspect you missed a "dont" )
BSW is 12tpi, UNC is 13 
That said, for all these sizes, the thread angle is always different,
and that can cause grief when mixed.
Thats the good thing about standards.
If you dont like the one you have, you can just choose another 
Dunno.
More like "Assembled in the USA from local and imported ingredients"
SAE ( being closer to UNF ) means most US manufacturers wont use it.
They use UNC. I know this is true of all my Meades, my Lunt and my Feathertouch, as they all use UNC.
My homemade wedge adjusters use 1/2"UNEF,
but i havent seen that supplied in the US yet.
Andrew
PS My local bunnings do supply true "High Tensile" SAE bolts,
but only in the dedicated "Auto" section of the store, not the general fasteners area. |