Proto J5219MN 19 Mm 12-pt 3/8 Drive Hand Socket

Product Description

The PROTO J5219MN is a 19 mm, 12-point intermediate hand socket designed for 3/8-inch drive ratchets and breaker bars. Built from steel with a polished finish, it meets ASME B107.21 standards for hand socket performance and dimensional accuracy. The standard-length body measures approximately 1-25/32 inches overall, placing it between shallow and deep classifications for reach in confined fastener locations. Licensed mechanics, maintenance technicians, and plumbers reach for this socket on hex-head fasteners in assemblies where a standard-depth socket clears the application and a deep socket is unnecessary.

This socket fits into general mechanical and maintenance service work across residential, commercial, and light industrial settings. The 19 mm size covers a wide range of metric fasteners including automotive wheel lug nuts on many vehicles, pipe flange bolts, equipment mounting hardware, and HVAC component brackets. It is compatible with any 3/8-inch drive ratchet, extension bar, or torque wrench, making it a versatile addition to a metric socket set.

Key Features

• 19 mm socket size fits common metric fasteners in mechanical and trade service work
• 12-point design allows engagement every 30 degrees for improved access in tight spaces
• 3/8-inch drive compatible with standard ratchets, extensions, and torque wrenches
• Steel construction meets ASME B107.21 dimensional and performance standards
• Polished finish resists corrosion and allows easy identification in a tool tray
• Lifetime warranty backed by the manufacturer

Compatibility

Designed for use with any 3/8-inch drive hand tool, including ratchets, breaker bars, extension bars, and torque wrenches. Fits standard 19 mm metric hex-head fasteners conforming to common fastener specifications.

Installation Notes

This socket is intended for hand-tool use only and should not be used with impact drivers or pneumatic tools unless the tool is rated for hand sockets. Always verify the fastener size and drive compatibility before applying torque. Inspect the socket for cracks or wear before each use, and replace if any deformation is present. Follow applicable torque specifications for the fastener application as defined by the equipment manufacturer or relevant service standards.