Proto J5277HA 5/8 Inch 6-point Hand Socket 3/8 Drive

Product Description

The PROTO J5277HA is a 5/8 inch, 6-point hand socket built for professional mechanical and maintenance applications. Machined from alloy steel with a chrome finish, it features a universal/flex socket type that allows angled drive access in tight or obstructed fastener locations. The 3/8 inch drive fits standard ratchets, extensions, and torque wrenches common to automotive, industrial, and field service work. At 1-7/8 inches overall length, this socket stays compact without sacrificing reach. It meets ASME B107.1 standards, which is the recognized benchmark for socket and drive tool performance in professional trades.

The J5277HA is suited for general mechanical service where 5/8 inch fasteners are common, including automotive drivetrain work, HVAC equipment service, industrial machinery maintenance, and plumbing fixture installations. The universal/flex geometry makes it especially useful when direct-line drive access is not available. It is used by mechanics, HVAC technicians, pipefitters, and maintenance trades who work with 3/8 inch drive toolsets on a daily basis.

Key Features

• 5/8 inch, 6-point socket profile reduces fastener rounding compared to 12-point designs
• Universal/flex type allows off-axis driving in confined or angled fastener locations
• 3/8 inch drive fits widely available ratchets, extensions, and torque wrenches
• Alloy steel construction with chrome finish resists corrosion and wear in service environments
• Meets ASME B107.1 standard for hand socket tools
• Compact 1-7/8 inch overall length for use in restricted spaces

Compatibility

Designed for use with standard 3/8 inch drive ratchets, extensions, and torque wrenches. Fits any 3/8 inch square drive tool conforming to ASME drive standards.

Installation Notes

Install and remove fasteners with a compatible 3/8 inch drive ratchet or torque wrench. Inspect the socket for cracks or wear before each use and replace if damaged. The flex/universal joint allows angled engagement, but avoid applying excessive side load that could stress the drive connection. Note that this socket is not tether capable and should not be used in overhead or drop-hazard environments without an independent retention method.