SATA ST12915SC 3/8" Drive Metric Spark Plug Socket 16mm

Key specs: 3/8" drive compatibility, 16mm spark plug size, made from chrome vanadium steel, chrome-plated finish for durability and corrosion resistance, deep socket design, single hex (6pt) fastener end, off-corner loading, large markings for easy size identification, and a lightweight, easy-to-handle profile.

Off-corner loading reduces rounding of the fastener corners during use, which helps protect spark plugs and extends the life of both the fastener and the socket when applying torque in tight spots.

Attach the socket to a 3/8" drive ratchet (using any extension if needed), align the socket with the spark plug axis, engage the plug squarely, and apply steady torque to loosen or tighten. Use an appropriate torque wrench if a specific torque spec is required for the spark plug.

Although designed for 16mm spark plugs, the socket can assist in automotive maintenance tasks that require a 16mm hex depth in tight engine spaces, especially where a deep socket and good grip are beneficial.

If you’re dealing with different spark plugs, consider the other size variants in the SATA line: 14mm and 18mm, which are available on Fepy.com. This ensures you have the correct tool for each plug size. For direct comparisons, see these product pages:

Alternatives in the same SATA line include the 14mm and 18mm variants: https://fepy.com/product/sata-st12914sc-3-8-drive-spark-plug-socket-14mm and https://fepy.com/product/sata-st12918sc-3-8-drive-spark-plug-socket-18mm. These offer similar build quality with the respective plug sizes.

Yes. It is made from chrome vanadium steel and finished with a chrome-plated surface, which helps resist rust and corrosion and keeps the tool looking and functioning well over time.

The socket features large size markings on the body, making it easy to identify the 16mm size at a glance, even in a crowded or low-light toolbox area.

Wipe the socket clean after use to remove oil and grime, store it in a toolbox or case to prevent impact damage, and avoid dropping it onto hard surfaces. Periodic inspection for scuffs or chrome wear will help preserve performance.

This SATA socket combines a deep design for hard-to-reach plugs, an off-corner loading feature to minimize fastener rounding, a clear size print for quick ID, and a durable chrome vanadium construction with a corrosion-resistant finish—delivering reliable performance at a cost-effective price.