Red 1/4 20 thread

[Paul Stevenson]

Hi, I'm looking to buy some extra 1/4 20" Allen bolts for mounting. I need 1/2" length bolts

Could anyone advise me what the Red thread spacing is? It appears there are many different thread sizes out there.

Thanks!

 

[Robert Hofmeyr]

I think the "20" part of 1/4-20 means 20 threads per inch.

 

[Eric Santiago]

Visit your local hardware bolt store.
I was surprised to find them in all varying sizes.
I went a little nuts and purchased quite a few

 

[Aaron Lochert]

I went a little nuts and purchased quite a few

I see what you did there.

But yeah, Robert is right. 20 stands for 20 threads per inch.