[svsdino]

Right I think I've answered my own question earlier, what would you re tap a 9/16 unef thread, 24 tpi, . I'd like to go metric as availability is better, the rods all have a nut welded in them so I haven't got that much metal to work with! All answers appreciated!

 

[german8rcoupe]

Cut the nut off and get weld in plugs in whatever flavour you like. Readily available now in 1/2", 5/8", 3/4" and M12, 14,16 etc

 

[svsdino]

I forgot to say I've already had the rods rechromed so trying to do it without welding

 

[Rustynut]

9/16" is 14.29mm

You could retap to M16 x 1.5 (metric fine)
Youll need to drill 14.5mm

Probably easier to find the 9/16" bolts

 

[chrisvs]

I forgot to say I've already had the rods rechromed so trying to do it without welding

Be careful not to let the cost of a bit of chroming compromise your and others safety.