On Aug 25, 2:55 pm, Randy Replogle wrote:
Sofolatris wrote:
What size rod do I use for 8-32 threads.I tried 3/16 but it is too big.
thanx

The major diameter for #8 threads is .164"
#10 is .190"
Randy

For home/hobby low-stress application, 5/32" dia. rod for #8 threads
would be OK.
For #10 threads 3/16" dia. rod is acceptable.
#5 thread is .125", ie. 1/8" diameter.

The rule for # thread outside dia. is quite simple: Begin with #0
thread which is .060" diameter. The steps between thread numbers are
a uniform .013".

For example consider #5 thread: .060 + (5 x .013) = .060 + .065 = .
125".
Another, say #10 thread: .060 + (10 x .013) = .060 + .130 = .190".

In fact the outside dia. of a screw thread can be considerably smaller
than the theoretical requirement. .005" undersize on smallish
screws, .010" on somewhat bigger, and .015 0n 1/4" dia. and up. A
quick review of the tolerance tables of screw threads in Machinerys
Handbook will disclose the standard tolerances. For home/hobby use
larger tolerances may be acceptable.

Trust this helps.

Wolfgang