3/4 Short Arm Alloy Steel Hex Key is a practical replacement tool when the socket needs full-flat engagement from an in-range hex key. The ASME B18.3 width band is 0.7470-0.7500 in.; the key is held just under nominal so it enters an in-tolerance socket and bears on the flats.
Replacement of rounded or worn keys helps protect expensive socket fasteners during service and teardown. Many buyers stock the Short Arm key beside its Long Arm twin so the same width is available in both geometries.
Cold Headers keeps this driver family tied to the broader socket-fastener catalog rather than treating it as a commodity tool. Review the 3/4 in. width, Short Arm format, short-leg length, and arm length before ordering. This width is part of the hard-to-find end of the range, where loose-driver restocking is often the real problem.
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
