1/4" hex insert and power bit drive dimension standards

[308guru]

Hi,

I was wondering if “standards” for ¼” hex insert and power bits exist? ASTM, ANSI, ISO, etc.

I looked through Machinery Handbook and didn’t see it, although certainly could have missed it while skimming 3000+ pages.

Thanks.

 

[mdrawde]

ISO 1173 and DIN 3126, the DIN standard has been superseded by the ISO standard but some manufacturers still reference DIN.

 

[308guru]

Great, thanks for the info!