0.035 Long Arm Alloy Steel Hex Key is selected when a worn or undersize key should be replaced before it damages the screw socket. The ASME B18.3 width band is 0.0345-0.0350 in.; the key is held just under nominal so it enters an in-tolerance socket and bears on the flats.
Repair benches use short and long formats to cover both open access and recessed socket locations. Many buyers stock the Long Arm key beside its Short 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 0.035 in. width, Long 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.
