3/4 Long Arm Alloy Steel Hex Key gives tool cribs a long arm driver for socket fasteners that need a correctly sized 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.

Die and mold work can require dedicated driver sizes near tooling plates, clamps, and adjustment hardware. Use the Long Arm series for deeper access, and compare the Short Arm twin when space around the socket is tight.

Cold Headers supports exact-size sourcing for socket-product tooling, including individual alloy steel L-keys. Review the 3/4 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. The listed B and C ranges keep the tool geometry tied to this exact catalog row.

Technical Highlights

• Style: L-shaped hex key, Long Arm
• Material: Alloy Steel
• Width Across Flats: 3/4 in. (0.7470-0.7500 in.)
• Short-Leg Length: 2.031-2.219 in.
• Arm Length: 11.156-11.344 in.
• Dimensional Standard: ASME B18.3

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.