[Shop-talk] What the heck screw do I need? And where do I get one?

[John P. New]

Try a local locksmith as well, the older the better. I know that my locksmith has boxes of old locksets, keys, doorknobs, square threaded spindles, etc. Sometimes he even gives me stuff for free because he has so much of it, he just wants it gone.

John

On March 3, 2017 06:35:27 PM David Scheidt wrote:
> I have a number of door knobs that need set screws to hold them to
> their spindles.  (Square threaded spindles in mortise locksets.)  The
> normal size of these is 1/4-20 or rarely 5/16-24 or even more rarely
> 1/4-28.  The existing screws are 28 tpi, with a major diameter of
> 0.280.  That's no screw thread I know of, but I have a house full of
> them (identical glass door knobs, presumably original to the house,
> circa 1925.) so it must be something.
> 
> 
>