Proto J5018DPL Spline Socket 3/8 in Drive 18 Spline Deep

Product Description

The PROTO J5018DPL is a deep spline socket designed for use with 3/8 inch drive ratchets and torque wrenches. It features an 18-spline configuration sized at 9/16 inch hex with a 12-point internal geometry, allowing engagement on fasteners with rounded or worn flats. The deep profile provides extra clearance for reaching recessed or extended-stud fasteners common in mechanical and service work. This socket is suited for professional technicians working in automotive, HVAC equipment service, and general mechanical repair applications where spline-drive fasteners are present.

The J5018DPL is used in service environments where spline-drive fasteners require a deep-reach socket and 3/8 inch drive tooling is preferred. The deep well design accommodates fasteners that sit below a surface or on a long threaded stud. It is a practical addition to a trade technician's socket set when standard-depth sockets do not provide enough clearance. Typical applications include equipment panels, motor mounts, and mechanical assemblies found in HVAC units, plumbing equipment, and light industrial machinery.

Key Features

• 3/8 inch drive fits standard ratchets, extensions, and torque wrenches in that drive class
• 18-spline, 9/16 inch hex configuration for engagement on spline-drive fasteners
• Deep socket profile allows reach on recessed or extended-stud fasteners
• 12-point internal geometry for consistent fastener contact and reduced rounding risk
• Sold individually, packaged quantity of 1

Compatibility

Designed as an OEM-style replacement spline socket compatible with 3/8 inch drive tool systems requiring an 18-spline, 9/16 inch hex deep socket.

Installation Notes

This socket is installed by mechanical and service technicians as part of standard hand-tool use. Before servicing any equipment, power down electrical systems and relieve any stored pressure or mechanical energy per applicable safety procedures. Use the correct drive extensions and adapters rated for 3/8 inch drive. Do not use impact drivers unless the socket is explicitly rated for impact use.