Interesting discovery about a Metric M6 bolt

Join the discussion
Registration is free. Ask a follow-up in this thread, or start your own.
Sign up Log in
3 replies · 8K views
CROSE85
Messages
1
Reaction score
0
Today while working I found that an M6 x 1.0 Thread bold will easily screw into a hole tapped 1/4"-28.

At first when I found this, I thought one of my boxes of bolts was labeled wrong, but I tried another set and it work.

Has anyone else come across this similarity before?

-CR
 

Discussion

Physics news on Phys.org
Yes I've noticed the same thing before, but it leaves a ton of clearance so the bolt tends to loosen up very quickly. It's not a very good idea to use the M6 in place of the 1/4-28 because of this, but it can work as a quick fix until you find the right bolt.
 
Anyone who does this has a screw loose.

(I couldn't resist.)
 
Is there any other type of M6 bolt besides a metric one?