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The TEKTON SHB13400 is a long hex bit socket designed for 3/8 inch drive ratchets and extensions. It accepts a 3 mm hex fastener and measures 5.9 inches overall length, making it suitable for reaching recessed bolts and fasteners that a standard-length socket would not reach. This type of socket is a routine hand-tool addition for mechanics, maintenance technicians, and general tradespeople who work with hex-head fasteners in tight or deep access locations.
This socket is used wherever 3 mm hex fasteners appear in confined or deep configurations. Common applications include equipment assembly, machinery maintenance, automotive work, and light industrial service tasks. The long-reach design gives the installer clearance over surrounding components without requiring an additional extension in many cases.
Designed as an OEM-style replacement and standard fitment for 3/8 inch drive tool sets requiring a long 3 mm hex bit socket.
Install and remove using a 3/8 inch drive ratchet, torque wrench, or breaker bar. Ensure the fastener is fully seated in the hex bit end before applying torque to avoid rounding the fastener head. Inspect the socket for cracks or wear before each use and replace any damaged sockets immediately.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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