7/16 Long 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 0.4355-0.4375 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. 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 7/16 in. width, Long 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. That context helps purchasing compare the driver geometry without adding unsupported performance claims.
Technical Highlights
- Style: L-shaped hex key, Long Arm
- Material: Alloy Steel
- Width Across Flats: 7/16 in. (0.4355-0.4375 in.)
- Short-Leg Length: 1.406-1.594 in.
- Arm Length: 7.406-7.594 in.
- Dimensional Standard: ASME B18.3
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
