Proto J5558M 58mm 12-point 3/4 Drive Hand Socket

Product Description

The PROTO J5558M is a 58 mm, 12-point hand socket designed for heavy-duty fastener work requiring a 3/4 inch drive. Built from alloy steel with a chrome-plated finish, this standard-length socket measures 3-13/32 inches overall. The 12-point geometry allows engagement at multiple positions around a fastener head, useful in tight or constrained spaces. It meets ASME B107.110-2012 and SAE AS955 standards, confirming dimensional and performance compliance for professional use. Licensed mechanics, industrial maintenance technicians, and heavy equipment service professionals will find this socket appropriate for high-torque applications common in fleet, construction, and plant maintenance environments.

This socket is suited for residential, commercial, and industrial applications where large-diameter fasteners are encountered. Typical use cases include heavy equipment repair, truck and bus chassis service, structural steel assembly, and industrial machinery maintenance. The 58 mm size addresses large hex fasteners found on axles, flanges, and heavy-duty mounting hardware. The standard length profile fits most 3/4 inch drive ratchets, breaker bars, and torque wrenches used in professional shop and field service settings.

Key Features

• 58 mm socket size for large-diameter fastener applications
• 12-point design allows multiple engagement positions per revolution
• 3/4 inch drive compatible with standard heavy-duty drive tools
• Alloy steel construction for strength under high-torque loads
• Chrome-plated finish for corrosion resistance and surface durability
• Meets ASME B107.110-2012 and SAE AS955 standards

Compatibility

Designed as an OEM-style hand socket for use with standard 3/4 inch drive ratchets, breaker bars, extensions, and torque wrenches in professional tool sets.

Installation Notes

Installation and fastener work with this socket should be performed by qualified mechanics or maintenance technicians familiar with proper torque procedures for the application. Ensure the drive tool and socket are fully seated on the fastener before applying force to prevent rounding or slippage. Inspect the socket for cracks or damage before each use and remove from service if deformation is found. Follow applicable industry standards and equipment manufacturer torque specifications when tightening critical fasteners.