Proto J4712DPL Spline Deep Socket 1/4 in Drive 3/8 in Hex

Product Description

The PROTO J4712DPL is a 12-point spline deep socket designed for professional use in automotive, mechanical, and industrial service applications. Built on a 1/4 inch drive, it accepts a 3/8 inch hex fastener and features a deep well profile that reaches recessed or extended fasteners that standard-depth sockets cannot access. The 12-point spline contact pattern distributes torque evenly across the fastener head, reducing the risk of rounding. Licensed mechanics, technicians, and millwrights who work with spline-drive fasteners in tight or deep clearance situations will find this socket a dependable hand tool addition.

This socket is suited for light-duty fastener work in confined spaces where a 1/4 inch drive ratchet or extension provides better access than larger drive sizes. The deep configuration handles bolts with exposed threads or fasteners set well below a surface. It is appropriate for use in automotive engine bays, HVAC equipment panels, electrical enclosures, and similar service environments where spline fasteners appear on OEM assemblies.

Key Features

• 12-point spline contact pattern reduces fastener rounding under torque
• Deep well profile reaches recessed or stud-mounted fasteners
• 1/4 inch drive fits standard quarter-inch ratchets, extensions, and flex handles
• 3/8 inch hex size matches common spline fasteners found on OEM mechanical assemblies
• Compact drive size reduces interference in tight clearance work areas

Compatibility

Designed as a direct-fit spline deep socket for use with standard 1/4 inch drive ratchets, extensions, and torque wrenches accepting 3/8 inch hex spline fasteners.

Installation Notes

Install and remove fasteners with a calibrated torque wrench when manufacturer torque specifications are required. Ensure the socket is fully seated on the fastener before applying torque to prevent slippage or fastener damage. Inspect the socket for cracks or wear before each use, and remove from service if deformation is observed.