Proto J7212M Impact Socket 3/8 in Drive 12mm 6-point

Product Description

The PROTO J7212M is a 12mm, 6-point impact socket designed for use with 3/8 inch drive impact wrenches and ratchets. It features a hex drive style and measures 1-1/32 inches overall length, making it a compact option for tight-access fastener work. Built for impact use, this socket is engineered to handle the rotational and shock loads generated by pneumatic and electric impact tools. Automotive technicians, industrial mechanics, and maintenance professionals install this socket for bolt removal and installation tasks where standard chrome sockets would be unsuitable.

This socket is suited for professional shop environments, field service, and industrial maintenance applications. The 3/8 inch drive size positions it for mid-range torque work, covering a wide range of metric fasteners encountered in mechanical assemblies, vehicle undercarriage work, and equipment service. The 12mm size is a common metric fastener dimension found across automotive, HVAC equipment panels, and light industrial machinery.

Key Features

• 3/8 inch drive fits standard impact wrenches and ratchets of the same drive size
• 12mm socket size for common metric fastener applications
• 6-point hex drive design maximizes contact area on fastener flats to reduce rounding
• Compact 1-1/32 inch overall length suits confined fastener access
• Impact-rated construction handles shock loads from pneumatic and electric impact tools

Compatibility

Designed as an OEM-style impact socket for use with 3/8 inch drive impact wrenches, air ratchets, and hand ratchets requiring a 12mm 6-point metric socket.

Installation Notes

Install and remove using standard 3/8 inch drive impact tools or hand ratchets. Confirm the socket is fully seated on the fastener before applying torque to avoid fastener rounding or socket damage. Do not use impact sockets on torque-sensitive fasteners without a calibrated torque wrench or torque-limiting adapter. Inspect the socket for cracks or deformation before each use and replace if wear is evident.