1/8 Short Arm Alloy Steel Hex Key helps keep socket fastener service practical by pairing the requested width with the specified arm series. The ASME B18.3 width band is 0.1235-0.1250 in.; the key is held just under nominal so it enters an in-tolerance socket and bears on the flats.

Maintenance carts benefit from exact loose sizes because rounded keys can stop a repair before the screw moves. 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 1/8 in. width, Short Arm format, short-leg length, and arm length before ordering. The listed B and C ranges keep the tool geometry tied to this exact catalog row.

Technical Highlights

• Style: L-shaped hex key, Short Arm
• Material: Alloy Steel
• Width Across Flats: 1/8 in. (0.1235-0.1250 in.)
• Short-Leg Length: 0.656-0.844 in.
• Arm Length: 2.156-2.344 in.
• Dimensional Standard: ASME B18.3

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