Don't really know. One of the flight departments in our community hangar folded. They were selling off tooling at bargain prices. Picked up a 1/4" and 3/8" drive Snap On. No documentation with the wrenches. But now that you bring it up I can probably find out with the model number though they are probably well out dated. I got these in the late 1980's.

 

Torque wrenches are great tools, but don't get overly concerned with their accuracy. That's not the important part of what they're about. Torque wrenches allow the user two advantages, one is to not over tighten a bolt beyond it's capabilities and strip it or break it off, and the other is to ensure all bolts securing two surfaces are tightened evenly, which helps prevent warpage. If your wrench is off a bit it's not really a problem as it'll be off consistently, and consistency is what they're all about.

 

I had mine checked in the cal lab at work. They were within spec.

 

Thanks for the heads up!

 

Originally Posted by RIPSAW
Also my cheapes say they are only within 4% which is 6 foot foot lbs at 150. What is your Snap on?

According to the guy I've been dealing with at Snap On, 4% clockwise, 6% counterclockwise. He also stated the dealer servicing my local area has a device on his truck to check calibration. I assume any Snap On dealer would be the same.