Proto J5218B 9/16 Inch 12-point 3/8 Drive Hand Socket

Product Description

The PROTO J5218B is a 12-point hand socket designed for professional hand-tool use in mechanical, electrical, and general maintenance applications. Built from alloy steel with a black oxide finish, this socket fits a 3/8 inch drive ratchet or breaker bar and turns 9/16 inch fasteners. The 12-point configuration allows engagement at 30-degree increments, giving technicians more ratchet swing in tight spaces. Overall length is 1-1/8 inches. The black oxide coating provides corrosion resistance under typical shop and field conditions. This socket meets ASME B107.1 standards and carries a limited lifetime warranty.

The J5218B is suited for residential and commercial maintenance tasks, automotive service, HVAC equipment assembly, electrical panel work, and general mechanical repair. Its compact 1-1/8 inch overall length makes it practical in confined fastener locations where longer sockets would not clear surrounding components. Licensed technicians and experienced tradespeople working with 3/8 inch drive tool sets will find this socket a standard-duty replacement or addition to an existing socket set.

Key Features

• 9/16 inch socket size for common SAE fastener applications
• 12-point design engages at 30-degree increments for tighter working clearances
• 3/8 inch drive compatible with standard ratchets, extensions, and breaker bars
• Alloy steel construction meets ASME B107.1 standards
• Black oxide finish for corrosion resistance in shop and field environments
• Limited lifetime warranty coverage

Compatibility

Designed as a standard OEM-style hand socket for use with 3/8 inch drive ratchets, extensions, and torque wrenches across general mechanical and trade applications.

Installation Notes

Installation and use should follow standard hand-tool safety practices. Ensure the socket is fully seated on the fastener before applying torque to avoid rounding. Do not use hand sockets with impact drivers or impact wrenches unless the socket is rated for impact use. This socket is not tether capable and should be secured appropriately when working at elevation.