Proto J5016MH Deep Hand Socket 16 Mm 6-point 3/8

Product Description

The PROTO J5016MH is a deep hand socket designed for 3/8-inch drive ratchets and breaker bars. Built to a 6-point internal geometry, it seats firmly on fastener flats and reduces the risk of rounding under load. The 16 mm socket size covers a wide range of metric fasteners found in automotive, HVAC equipment, plumbing fixtures, and general mechanical work. A chrome-plated finish provides corrosion resistance and makes surface cleaning easier between jobs. The deep-length profile allows the socket to reach recessed or stud-mounted fasteners that a standard-length socket cannot access. This is a single-piece, professional-grade hand tool appropriate for licensed tradespeople and serious DIYers alike.

This socket is suited for use in any trade environment where metric fasteners require a deep-reach solution on a 3/8-inch drive. Common applications include HVAC equipment service, pump and motor work, electrical panel and conduit hardware, and automotive mechanical tasks. The 16 mm size is frequently encountered on condensing unit hardware, motor mounts, and pipe flange bolting. It functions with standard 3/8-inch drive ratchets, extensions, and torque wrenches available from any professional tool supplier.

Key Features

• 16 mm socket size for common metric fastener applications
• 6-point geometry for maximum contact on fastener flats, reducing rounding risk
• Deep-length profile reaches recessed or stud-mounted fasteners
• 3/8-inch drive compatible with standard ratchets, extensions, and torque wrenches
• Chrome-plated finish for corrosion resistance and easy cleanup

Compatibility

Designed as a standard deep hand socket for use with any 3/8-inch drive ratchet, extension bar, or torque wrench accepting 3/8-inch drive accessories.

Installation Notes

This socket is a hand tool and does not require installation. Always confirm the fastener size before applying torque to avoid rounding hardware. When using with a torque wrench, ensure the square drive is fully seated and the extension or adapter is rated for the torque being applied. Inspect the socket for cracks or wear before use and retire any damaged tooling from service.