Proto J5211MN 11 Mm 12-point 3/8 Drive Hand Socket

Product Description

The PROTO J5211MN is a standard-length, 12-point intermediate hand socket sized at 11 mm, designed for use with a 3/8-inch drive ratchet or breaker bar. Built from polished steel and manufactured to ASME B107.21 standards, this socket delivers reliable torque transfer on hex fasteners in tight or moderate-clearance applications. The 12-point design allows the socket to engage the fastener at 30-degree increments, offering more positioning options in confined work areas. At 0.08 pounds, it is a lightweight addition to any service technician's socket set. HVAC, plumbing, and electrical tradespeople will find it useful for equipment panel hardware and mechanical fasteners across a range of service calls.

This socket is suited for general maintenance and installation work across residential and light commercial environments. It fits standard 3/8-inch drive tool setups and is compatible with ratchets, extensions, and torque wrenches of the same drive size. Typical applications include fastener removal and installation on equipment enclosures, junction boxes, pipe fittings, and mechanical assemblies where an 11 mm fastener is specified. The polished finish resists surface oxidation under normal storage and use conditions.

Key Features

• 11 mm socket size for metric fastener applications
• 12-point geometry allows engagement at 30-degree increments for use in confined spaces
• 3/8-inch drive compatible with standard ratchets, extensions, and torque wrenches
• Polished steel construction meets ASME B107.21 standards
• Standard-length profile suitable for most accessible fastener locations
• Lifetime warranty backed by the manufacturer

Compatibility

Designed for use with any standard 3/8-inch drive hand tool, including ratchets, breaker bars, extensions, and torque wrenches that accept a square 3/8-inch drive socket.

Installation Notes

This socket is intended for use by qualified tradespeople working on mechanical, HVAC, plumbing, or electrical equipment. Always ensure the drive tool and socket are fully seated on the fastener before applying torque to avoid rounding fastener heads. Power down or de-energize equipment and relieve system pressure before removing any fasteners on live systems. Follow all applicable codes and manufacturer service procedures for the equipment being serviced.