Proto J5319M Deep Hand Socket 19mm 12-point 1/2 Drive

Product Description

The PROTO J5319M is a deep hand socket designed for 1/2 inch drive ratchets and torque wrenches. Built from alloy steel with a chrome-plated finish, it accepts 19 mm fasteners and features a 12-point internal geometry for engagement on standard hex fasteners from multiple approach angles. At 3.25 inches in overall length, the deep profile provides the clearance needed to reach recessed or stud-mounted fasteners that shallow sockets cannot access. This socket meets ASME B107.110-2012 and SAE AS955 standards, making it appropriate for professional-grade mechanical work.

The J5319M suits automotive, heavy equipment, and industrial maintenance applications where 19 mm fasteners are common — wheel lug nuts, suspension hardware, engine components, and structural fasteners. The 1/2 inch drive is the standard choice for higher-torque work where 3/8 inch drive tools would be undersized. Licensed mechanics, fleet technicians, and industrial maintenance trades typically carry this size as a core socket in a professional set.

Key Features

• 19 mm socket size for common automotive and industrial fasteners
• 12-point design allows engagement at 30-degree intervals, useful in tight spaces
• Deep length at 3.25 inches provides clearance over recessed bolts and studs
• Alloy steel construction rated for high-torque hand tool applications
• Chrome-plated finish resists corrosion and simplifies surface cleaning
• Meets ASME B107.110-2012 and SAE AS955 standards

Compatibility

Designed for use with standard 1/2 inch drive ratchets, breaker bars, torque wrenches, and extensions. Fits any 1/2 inch square drive tool following ASME B107 drive interface standards.

Installation Notes

Install and remove using a 1/2 inch drive hand tool — do not use impact drivers unless the socket is impact-rated. Ensure the socket is fully seated on the fastener before applying torque to prevent rounding. Inspect the drive square and internal socket walls for wear or cracking before each use on high-torque applications. This is a not-tether-capable socket and should not be used in elevated or overhead work environments requiring tool retention.