Proto J5555M 2-1/16 in 12-point 3/4 Drive Hand Socket

Product Description

The PROTO J5555M is a 2-1/16 inch, 12-point hand socket designed for heavy-duty fastener work in professional trade environments. Built on a 3/4 inch drive, this standard-length socket handles large-format hex fasteners found in industrial, mechanical, and structural applications. The chrome-plated finish resists corrosion and aids in cleanup after use. At 2.55 pounds, the socket is solid and well-weighted for use with standard 3/4 drive ratchets, breaker bars, and torque wrenches. Typically installed by millwrights, heavy equipment mechanics, pipefitters, and industrial maintenance technicians who routinely work with large fasteners.

This socket is suited for use in industrial maintenance, heavy equipment servicing, and structural assembly where large-diameter fasteners require reliable engagement. The 12-point design allows for more ratcheting positions compared to a 6-point socket, making it useful in tight or awkward spaces where swing arc is limited. Standard length provides a balance between reach and clearance in most common service scenarios.

Key Features

• 2-1/16 inch socket size fits large hex fasteners common in industrial and heavy mechanical applications
• 12-point configuration offers 30-degree ratcheting increments for use in confined spaces
• 3/4 inch drive compatible with standard 3/4 drive ratchets, extensions, and breaker bars
• Chrome-plated finish provides corrosion resistance and easy surface cleaning
• Standard length design suits the majority of industrial and mechanical service scenarios
• Not tether capable — intended for conventional hand-tool use in non-drop-hazard environments

Compatibility

Designed as an OEM-style hand socket for use with standard 3/4 inch drive tool systems requiring a 2-1/16 inch, 12-point socket.

Installation Notes

This socket is a hand tool used by mechanics, millwrights, and industrial maintenance technicians — no power source is required. Ensure the socket is fully seated on the fastener before applying torque to avoid rounding. Use appropriate 3/4 drive extensions and adapters rated for the expected load. Inspect the socket for cracks or wear before use in high-torque applications.