Proto J5218MH 18mm 3/8 Drive 6-point Chrome Hand Socket

Product Description

The PROTO J5218MH is an 18 mm, 6-point hand socket built for professional-grade hand tool applications. Manufactured from steel with a chrome-plated finish, it accepts a 3/8 inch drive and is sized to standard length. The 6-point geometry delivers full contact across fastener flats, reducing the risk of rounding on corroded or high-torque fasteners. This socket meets ASME B107.5 standards, making it a reliable choice for mechanics, maintenance technicians, and trade professionals who depend on tool accountability and durability in daily service work.

This socket is suited for automotive, HVAC, plumbing, and general mechanical applications where 18 mm fasteners are common. The standard length profile works well in open or moderately confined spaces. It is typically paired with a 3/8 inch drive ratchet, breaker bar, or torque wrench. The chrome finish resists surface corrosion during normal shop and field use, keeping the socket serviceable over repeated cycles.

Key Features

• 18 mm socket size for metric fastener applications
• 3/8 inch drive for compatibility with standard mid-range drive tools
• 6-point contact geometry reduces fastener rounding under load
• Chrome-plated steel construction for corrosion resistance and durability
• Standard length profile for general-access installations
• Meets ASME B107.5 hand tool standards

Compatibility

Designed as a standard 3/8 inch drive hand socket compatible with 3/8 inch drive ratchets, extensions, and torque wrenches conforming to common drive tool conventions.

Installation Notes

Install and remove with a 3/8 inch drive ratchet, breaker bar, or torque wrench rated for the fastener application. Ensure the socket is fully seated on the fastener before applying torque to avoid slippage. Inspect the socket and drive square for wear or damage before use on high-torque fasteners. Store in a dry environment to preserve the chrome finish.