Proto j5209m Metric Socket 3/8 in Drive 9 Mm 12-point

Product Description

The PROTO j5209m is a metric hand socket designed for general-purpose fastener work in professional trade and maintenance applications. Built with a 3/8 inch drive end, it attaches to any standard 3/8 inch drive ratchet, breaker bar, or extension. The socket fits 9 mm fasteners and uses a 12-point configuration, which allows engagement at every 30 degrees of rotation — useful in tight spaces where swing arc is limited. The chrome finish provides corrosion resistance for toolbox storage and repeated use. Licensed tradespeople and experienced mechanics reaching for a reliable metric socket for general service work will find this a straightforward fit.

This socket is suited for residential and commercial maintenance, mechanical service, plumbing fixture work, electrical panel and equipment installation, and HVAC component service where metric fasteners are common. The 3/8 inch drive size makes it compatible with a widely available range of drive tools, from click-type torque wrenches to standard ratchet handles. It is not tether capable, so it is not rated for use in overhead or elevated work environments that require tool tethering under dropped-object prevention programs.

Key Features

• 3/8 inch drive end fits standard 3/8 inch drive ratchets, extensions, and torque wrenches
• 9 mm socket size for metric fastener engagement
• 12-point design allows fastener engagement every 30 degrees of rotation
• Standard length profile suitable for most general-purpose service tasks
• Chrome finish resists corrosion during storage and regular use
• Not tether capable — not rated for dropped-object prevention applications

Compatibility

Designed as a general-purpose metric socket compatible with standard 3/8 inch drive hand tools including ratchets, breaker bars, torque wrenches, and drive extensions.

Installation Notes

Install and remove this socket by hand before applying drive force to ensure full seating on the fastener. Always power down or de-energize equipment before using hand tools on fasteners that secure electrical enclosures or live components. Inspect the socket for cracks or wear before use — damaged sockets should be removed from service. This socket is not rated for impact driver use; use impact-rated sockets with pneumatic or electric impact tools.

Technical Specifications

• Drive Size: 3/8 inch
• Socket Size: 9 mm
• Point Configuration: 12-Point
• Profile: Standard
• Finish: Chrome
• Measurement System: Metric
• Tether Capable: No

Standard Information

• Brand: PROTO
• Manufacturer Part Number: j5209m