Proto J5016DPL Spline Socket 3/8 in Drive 16 Spline

Product Description

The PROTO J5016DPL is a deep spline socket designed for professional hand-tool use in mechanical, HVAC, plumbing, and general trade applications. Built on a 3/8 inch drive, it accepts a 16-spline fastener with a 1/2 inch hex size and features a 12-point internal configuration. The deep-profile design provides the reach needed to seat fully onto recessed or extended fasteners without losing drive engagement. Mechanics and trade technicians who regularly work with spline-head fasteners will find this socket a direct-use replacement in standard 3/8 inch drive ratchets and torque wrenches.

This socket is suited for residential and commercial service environments where spline fasteners appear on equipment panels, blower assemblies, motor mounts, and structural hardware. The 3/8 inch drive size positions it as a mid-range tool appropriate for medium-torque applications. It is packaged individually and carries a minimum order quantity of one unit, making it practical for single-unit replacement or toolbox additions by working technicians.

Key Features

• Deep socket profile for reach on recessed or extended spline fasteners
• 3/8 inch drive fits standard ratchets, extensions, and torque wrenches
• 16-spline, 1/2 inch hex size for compatible spline-head fasteners
• 12-point configuration provides multiple engagement positions
• Lightweight at 0.12 pounds, reducing hand fatigue during extended use

Compatibility

Designed as an OEM-style replacement spline socket for use with 3/8 inch drive ratchets and drive tools requiring a 16-spline, 1/2 inch hex deep socket.

Installation Notes

This socket is installed and removed by hand-tool technicians using standard 3/8 inch drive ratchets, extensions, or torque wrenches. Ensure the drive tool is fully seated into the socket before applying torque to prevent rounding or socket separation. Inspect the socket and drive tool for wear or cracks before use, and discontinue use if deformation is observed.