Yeah, unpopular.
McMaster has 3-48 threaded rod (#98837A004, 3 ft, $2).
A nut epoxied/brazed on the end (or double-nutted) will give you the option
of nut-driving it or slotting it. You can grind/turn down the nuts nicely
for a less cobby appearance, as well.
Brass nuts would be nice, or even acorn nuts. Which you could also make
pretty easily from brass rod.

McM might have the screws as well, or can get them. They've gotten odd
sizes for me.
5-40 is also limited in sizes, as compared to 4-40.
732 329-3200
----------------------------
Mr. P.V.'d
formerly Droll Troll
"jaz" wrote in message
ups.com...
I'm trying to mount a pickup in a guitar. The screws supplied by the
manufacturer are 3-48x1.25" and are too short.

There are few fastener companies selling 3-48 screws to begin with but
I can't find anyone selling a 1.5" length.

Anyone know where I can get these?

Otherwise, I will have to buy a 4-40tpi tap and switch to 4-40 screws.
Those I can find in 1.5" lengths.

Jaz