5/64 Short Arm Alloy Steel Hex Key covers the 5/64 in. driver position in an alloy steel hex-key range used throughout machine work. The ASME B18.3 width band is 0.0771-0.0781 in.; the key is held just under nominal so it enters an in-tolerance socket and bears on the flats.
Machine setup and changeover work often needs a repeatable L-key at the station rather than a shared tool set. Short Arm geometry favors compact reach and quick hand rotation; the same width in Long Arm form is the natural comparison.
Since 1962, Cold Headers has supplied specialty socket hardware and the hex keys that complete the working system. Review the 5/64 in. width, Short Arm format, short-leg length, and arm length before ordering. Non-catalog hex-key widths and series can be reviewed when a tool crib needs a special driver.
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
