Sunex Tools 3/8" Drive 9/16" Extra-Deep Spark Plug Socket — CR-MO, Black Phosphate

The SUNEX TOOLS 884505 is a 3/8-inch drive, 9/16-inch extra-deep spark plug socket made from CR-MO alloy steel for reaching recessed spark plugs and fasteners.

This extra-deep impact socket extends beyond standard deep sockets so you can access spark plugs, long studs and threaded rods tucked into engine wells or machinery housings. Finished in industrial black phosphate to resist corrosion and built with a 6-point profile and radius corners, it balances impact performance with reduced fastener wear. The socket meets ANSI and ASME benchmarks and is covered by SUNEX Tools’ lifetime warranty, making it a dependable addition to a mechanic’s kit or a home garage toolbox.

How does this extra-deep socket reach recessed spark plugs?

The extended wall length provides additional reach compared with typical deep sockets, allowing clearance over long studs and into narrow openings. Its 9/16-inch bore fits a common spark plug size, and the 3/8-inch drive keeps compatibility with standard ratchets and breakers.

• Extra-deep wall length for long reach into engine wells
• 9/16-inch socket diameter sized for many spark plugs
• 3/8-inch drive fits widely used ratchets and impact tools
• 6-point profile grips hex heads securely to reduce rounding

What materials and finish protect the tool under tough conditions?

Manufactured from chrome-molybdenum (CR-MO) alloy steel, the socket is engineered to withstand repeated impact and torque. The black phosphate finish helps shield the metal from rust and grime, extending service life in workshop environments.

• CR-MO alloy for enhanced strength and impact resistance
• Black phosphate finish for corrosion and wear protection
• Radius-corner design minimizes stress concentrations
• Meets or exceeds ANSI and ASME quality standards

Will this socket work with impact tools and common fastener types?

Yes — the 6-point configuration and CR-MO construction make it suitable for impact use, offering firm contact on hex-shaped fasteners while resisting deformation. It’s designed for general service on many foreign and domestic engines and other applications that require extra reach.

• Rated for use with impact wrenches and drivers
• 6-point design reduces slippage on hex fasteners
• Compatible with a wide range of vehicle makes and models
• Useful for spark plugs, long bolts, studs and threaded rod

What warranty and quality assurances come with this SUNEX socket?

SUNEX Tools backs this socket with a lifetime warranty, reflecting confidence in its manufacturing and materials. The product also conforms to industry standards for dimensions and performance, giving professionals and hobbyists predictable fit and durability.

• Lifetime warranty through SUNEX Tools for peace of mind
• Manufactured to meet or exceed ANSI and ASME criteria
• Consistent size and fit for interoperability with other tools
• Industrial finish intended for long-term shop use

Who is this for? The SUNEX TOOLS 884505 3/8-inch drive, 9/16-inch extra-deep spark plug socket is aimed at mechanics, technicians and serious DIYers who need extra reach for spark plug service or work with long studs and recessed fasteners. If you use impact tools or require reliable, standards-compliant sockets that resist wear and corrosion, this tool fits neatly into professional kits and home garages alike.