Total THSPS12216 1/2″ Spark plug socket 21mm

TOTAL THSPS12216 1/2″ Spark Plug Socket (21mm) is a specialized deep socket designed specifically for the safe removal and installation of $21\text{ mm}$ spark plugs in automobiles, lawnmowers, and gasoline generators.

Key Specifications

• Model Number: THSPS12216

• Square Drive Size: $1/2\text{ inch}$ (compatible with standard $1/2\text{”}$ ratchets, extension bars, and torque wrenches)

• Socket Size: $21\text{ mm}$ (hex opening)

• Material: 50BV30 High-Grade Chromium-Vanadium Steel (Cr-V)

• Treatment & Finish: Fully heat-treated with a polished chrome plating for durability and rust resistance

• Packaging: Plastic hanger display card

Key Features & Design Details

• Internal Rubber Retaining Ring: Features an inner rubber insert cushion that firmly grips the ceramic body of the spark plug. This prevents ceramic cracking during application and holds the plug inside the socket so it can be easily lifted out of deep engine wells.

• Deep Wall Construction: Extended body length provides ample clearance for the tall insulator nose and terminal nut of spark plugs.

• 6-Point Hex Profile: Fits snugly over hex fasteners to maximize surface contact and prevent rounding under torque.

• Corrosion Resistance: Fully polished chrome plating repels oil, grease, and engine fluids for long-term corrosion protection.