What thread is this?

[AceOfHearts]

I need to buy a nut for the rear engine earth, does anyone know what thread it is? The larger course end is what screws into the block.

[phillpot]

My guess is 5/16 unf with the "block thread" being 5/16 unc pop round and I'll find you a nut and a washer




Top Tip: put a ruler in the photo to give it some scale (and you could even measure the diameter of the stud)

Edited by phillpot on Thursday 15th January 15:43

[Chuffmeister]

Answer is here!

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

[Sardonicus]

5/16 unc

[AceOfHearts]

Cheers guys, got some ordered up from eBay