Some of you have sent me links to standard weight bolts and I thank you, but that isn't what I need. If you will look at the fuzzy picture above, notice the underside of the head is machined flat. What I need has to have that feature. I can find lots of screws made that way but none I've found are over 1.5" long. I need the additional weight of the longer screw to increase cue weight and bring the balance point back a bit.
You were very wise to insist in what you wanted.
There's a reason that Schon, myself and others under-cut the head of the screw.
It bottoms onto a flat surface. I've seen tapered shoulder machine screws used
where a flat shoulder was required and the screw eventually split the butt tenon.
If the bolt is also serving as a mechanical secuering device for the butt-cap,
you wouldn't want a tapered shoulder screw putting lateral presure on the cap
while the screw's being tightened and for thereafter.
Most all cues are different and that applies to their wght-blts also.
Sometimes wght-blts ain't just ballast.
KJ