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The PROTO J5208M is a 12-point hand socket designed for use with a 3/8-inch drive ratchet or extension. Sized at 8 mm, it features a chrome-plated finish that resists corrosion and simplifies cleanup in the field. The standard-length profile keeps it manageable in confined spaces without sacrificing reach on fastener heads. Built to ASME B107.5 standards, this socket is suited for professional mechanics, maintenance technicians, and industrial tradespeople who require reliable, spec-compliant hand tools in daily service work.
This socket is a standard fitment for general-purpose mechanical and industrial maintenance applications. The 8 mm size is commonly encountered on metric fasteners found in HVAC equipment panels, electrical enclosures, plumbing fixture hardware, and light mechanical assemblies. The 12-point design allows engagement at more approach angles than a 6-point socket, making it practical when swing room is limited.
Designed for use with 3/8-inch drive ratchets, extensions, and torque wrenches as an OEM-style hand socket for general metric fastener service.
Install and remove using a properly rated 3/8-inch drive ratchet or torque wrench. Always ensure the socket is fully seated on the fastener before applying torque to prevent rounding. De-energize and lock out equipment before performing any service work on electrical or mechanical assemblies. Inspect the socket for cracks or wear before each use and retire any damaged tooling immediately.
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