Proto J5212SPL Spline Socket 3/8 in Drive 12 Spline

Product Description

The PROTO J5212SPL is a 12-point spline socket designed for professional-grade fastener work. It accepts a 3/8 inch drive and is sized for 3/8 inch hex spline fasteners with a 12-spline configuration. This socket is built for use with ratchets, torque wrenches, and impact-rated drive tools in mechanical, HVAC, plumbing, and electrical service environments. It meets Federal Specification GGG-W-641e and ANSI Spec B107.1, confirming dimensional and performance compliance for trade and government applications. Lightweight at 0.06 pounds, it suits toolbox carry without adding bulk.

This socket fits common service scenarios where spline-drive fasteners are encountered on equipment panels, mechanical assemblies, and structural hardware. The 3/8 inch drive size makes it compatible with a wide range of standard ratchet handles and extensions used in residential and light commercial service work. It is a single-unit stock item suitable for replacement of a lost or worn socket from an existing set.

Key Features

• 3/8 inch drive accepts standard ratchets, extensions, and torque wrenches
• 12-point spline configuration engages 3/8 inch hex spline fasteners
• Meets Federal Spec GGG-W-641e and ANSI Spec B107.1
• Lightweight construction at 0.06 pounds
• Sold individually — direct replacement for missing or worn sockets

Compatibility

Designed as an OEM-style replacement spline socket for use with 3/8 inch drive ratchets, extensions, and torque wrenches requiring a 3/8 inch hex spline 12-point socket.

Installation Notes

This socket is installed and removed by hand using standard 3/8 inch drive tools. Before servicing any equipment, de-energize electrical systems at the breaker and shut off any applicable fluid or gas supplies per local codes. Inspect the socket for cracks or rounding before use, and do not use a damaged socket on torque-sensitive fasteners. Use with a calibrated torque wrench where fastener torque specifications are required by the equipment manufacturer.