Proto J5320-50 Spark Plug Hand Socket 5/8 in 6-point

Product Description

The PROTO J5320-50 is a 5/8 inch, 6-point spark plug hand socket designed for removing and installing spark plugs in automotive and light equipment engines. Built from alloy steel with a chrome-plated finish, it features a 1/2 inch square drive and measures 2.5 inches in overall length. The 6-point geometry maximizes contact with the spark plug hex, reducing the chance of rounding during stubborn extractions. It meets ASME B107.110-2012 and SAE AS4984A standards, making it a reliable choice for professional mechanics and service technicians working in shops or in the field.

This socket is suited for use in automotive repair, fleet maintenance, and small engine service applications where a 5/8 inch spark plug hex is the standard fitment. The 1/2 inch drive connection works with standard ratchets, breaker bars, and torque wrenches commonly found in professional tool setups. It is not insulated, so it is intended for use in de-energized ignition systems only. The compact 2.5 inch overall length allows access in moderately tight engine bays without requiring a deep-well extension in most applications.

Key Features

• 5/8 inch socket size fits standard spark plug hex configurations
• 6-point contact geometry reduces fastener rounding under high torque
• 1/2 inch square drive compatible with common ratchets and torque wrenches
• Alloy steel construction with chrome-plated finish for corrosion resistance
• Meets ASME B107.110-2012 and SAE AS4984A standards
• 2.5 inch overall length suits most standard engine bay access scenarios

Compatibility

Designed as a standard-fitment replacement spark plug hand socket for use with 5/8 inch spark plug hexes and 1/2 inch drive ratchets or torque wrenches in automotive and light equipment service applications.

Installation Notes

Installation and removal of spark plugs should be performed by a qualified mechanic with the ignition system fully disabled and the engine allowed to cool before service. Use a calibrated torque wrench when reinstalling spark plugs to avoid over-torquing threads in aluminum cylinder heads. This socket is not insulated and must not be used on energized ignition components. Follow engine manufacturer torque specifications for the specific application.