In article t, Roger Hull
says...

I should add the screw is hollow with internal splines and, as best I can
measure it it is 5/8-10 Left Hand Acme threads. I lack the skill or equipment
to reproduce the internal splines.

Hmm. Turn the old thread off the splined area, and bore out
the end of the screw you bought. Then silver solder the
splines in place?

Liberal use of stop-off suggested!

Jim

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