1/4-18 thread machine screw?

[LD1]

It's almost as if someone set up a screw machine wrong. Had 1/4" stock and 18 thread per inch cutters just adjusted them until they made threads?????
I've been watching this to see if the mystery is solved.

Kinda what I was thinking at first as well. Someone made some screws and did it wrong.

But...How did they tap the holes???

Mystery indeed

 

[Baby Grand]

Strange alright. Could always buy lo grade 1/4-20 and give em a stretch

That would "yield" you a 1/4-18!

 

[Soundguy]

not solved yet. i've sugested going 5/16-18 with a tap. it's the least invasive i think.

 

[SPYDERLK]

That would "yield" you a 1/4-18!

Well, :confused3: it would neck down a little - but close enuf. ... Actually, tapping to 1/4-20 should be plenty strong since the nut has greater thread root and thus its threads have inherent strength advantage over those on the bolt.

And heel be able to use either bolt. .

 

[Soundguy]

base material is aluminum.. have to take that into consideration as well.

 

[SPYDERLK]

A weaker nut metal would make some difference, but i didnt see it stated.
larry

 

[BukitCase]

At this point, I'd think one of THESE

Amazon.com: ramset

Would be lookin' pretty good.. :thumbsup: Steve

And yes, I'm kidding...