Gearwrench 80403 Spark Plug Socket 3/8 in Drive 13/16 in

Product Description

The GEARWRENCH 80403 is a 13/16 inch, 6-point spark plug hand socket designed for 3/8 inch drive ratchets and extensions. Constructed from alloy steel with a chrome-plated finish, it provides the strength and corrosion resistance needed for repetitive spark plug service. The 6-point design concentrates torque on the flats of the plug hex, reducing the risk of rounding during removal or installation. At 2.72 inches in overall length, it fits standard spark plug recesses found on most gasoline engines. The socket meets ANSI and ASME B107.1 standards and carries a lifetime replacement warranty.

This socket is suited for automotive, small engine, and light equipment spark plug service. It is a standard tool in the kit of automotive technicians, small engine mechanics, and fleet maintenance personnel. The 3/8 inch drive size pairs with common hand ratchets, breaker bars, and torque wrenches already in most tool kits, making it a straightforward drop-in addition to a drive set used for tune-ups and ignition system work.

Key Features

• 13/16 inch socket size for standard spark plug service
• 3/8 inch hex drive compatible with standard ratchets and extensions
• 6-point contact geometry reduces fastener rounding
• Alloy steel construction with chrome-plated finish for durability and corrosion resistance
• Tether-capable design supports tool accountability in professional environments
• Meets ANSI and ASME B107.1 standards with lifetime replacement warranty

Compatibility

Designed as an OEM-style replacement-grade spark plug socket compatible with 3/8 inch drive ratchets, breaker bars, and torque wrenches accepting standard hex drive tooling.

Installation Notes

Automotive and small engine technicians should ensure the ignition system is disabled and the engine is cool before removing or installing spark plugs. Use a torque wrench to tighten plugs to the engine manufacturer's specification — do not rely on feel alone, as over-torquing can damage cylinder head threads. Inspect the socket's rubber or foam insert if present to confirm it retains the plug during installation without slipping.