Proto J5012MH Deep Hand Socket 12 Mm 3/8 Drive

Product Description

The PROTO J5012MH is a 12 mm deep hand socket designed for 3/8-inch drive ratchets and breaker bars. Built with a 6-point internal geometry, it delivers full-face contact on fastener flats, reducing the risk of rounding under torque. The chrome-plated finish resists corrosion and makes it easier to wipe clean in shop and field environments. At 1.1 inches in length, this deep-profile socket reaches recessed fasteners and bolt-stud combinations that standard-depth sockets cannot access. Weighing 0.14 pounds, it adds minimal bulk to a socket set. This socket is suited for automotive, mechanical, and general maintenance work where a 12 mm metric fastener requires extra reach.

This socket is used in automotive service, fleet maintenance, HVAC equipment assembly, and general mechanical repair wherever a 12 mm metric bolt or nut sits in a recessed or stud-mounted position. The deep-well design accommodates extended thread protrusion without sacrificing drive engagement. It is a hand-drive tool intended for use with 3/8-inch drive ratchets, extensions, and torque wrenches in both shop and field settings.

Key Features

• 12 mm socket size for standard metric fastener work
• 3/8-inch drive compatible with standard ratchets, extensions, and torque wrenches
• 6-point design provides full-face contact, reducing fastener rounding
• Deep-well length of 1.1 inches reaches recessed bolts and stud-mounted fasteners
• Chrome-plated finish resists corrosion and simplifies cleaning
• Lightweight at 0.14 pounds for easy handling in multi-socket sets

Compatibility

Designed for use with standard 3/8-inch drive ratchets, torque wrenches, and extensions as a deep-well metric hand socket.

Installation Notes

This socket is installed by qualified mechanics and technicians working on metric-fastened equipment. Ensure the drive tool is rated for the torque being applied before use. Inspect the socket for cracks or deformation before each use and replace if damage is found. Do not use hand sockets with impact drivers unless the socket is rated for impact use.