Teng Tools 3/8" Spark Plug Socket 21mm — M380046-C

Teng Tools 3/8 Drive 21 mm Spark Plug Socket - Individual Metric Plug Wrench for Service and Maintenance - M380046-C

$9.99
$9.99
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Teng Tools 3/8" Spark Plug Socket 21mm — M380046-C
  • Teng Tools 3/8" Spark Plug Socket 21mm — M380046-C
Teng Tools 3/8 Drive 21 mm Spark Plug Socket - Individual Metric Plug Wrench for Service and Maintenance - M380046-C

Teng Tools 3/8 Drive 21 mm Spark Plug Socket - Individual Metric Plug Wrench for Service and Maintenance - M380046-C

$9.99
$9.99
In stock
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Download data sheet (PDF)
Engines that use a 21 mm hex spark plug need a socket that fits precisely, and that is exactly what this Teng Tools 3/8 drive socket delivers. The 21 mm opening seats fully on the plug body for controlled torque application, protecting the ceramic insulator and the cylinder head threads during every removal and installation cycle. The 3/8 drive connects to the ratchets and extensions already on your cart, so there is no need to purchase adapters or specialty handles. The drive size balances torque capacity with a compact footprint, letting you work in engine bays where space is limited. This is a single tool, not a set. If your shop works on platforms that specify 21 mm plugs, or if you need to fill one gap in your current socket lineup, buying the exact size you need is the most efficient path. No extra sizes, no extra cost, no extra clutter. Verify the spark plug hex dimension in your vehicle or equipment service manual before ordering. With the correct size confirmed, this Teng Tools socket will be ready to perform every time a plug change comes up on your maintenance schedule.
Also part of 7 tool kits

Kits shown in red are available to buy.

Specifications

TypeAuto Tools
CategoryStandard Sockets
Drive size3/8"
Part numberM380046-C
Shipping

Free shipping on orders over $99. Orders are stocked, picked and shipped from our warehouse in Fort Worth, Texas — orders placed on business days ship same-day wherever possible.

Lifetime warranty

Teng Tools hand tools are backed by a lifetime warranty against manufacturing defects. Screwdriver bits and socket bits are consumables and are guaranteed to meet dimensional standards. Torque wrenches and air tools can be serviced and recalibrated on request — contact us to arrange it.

Returns

Not right for the job? Contact us within 30 days of delivery and we'll sort out a return or exchange. Tools must be unused and in their original packaging. Warranty claims are handled separately — a defective tool is our problem, not yours.

Why Teng Tools?

Swedish Design Since 1985

Trusted in 30+ countries. Designed in Sweden, built to ISO and DIN standards.

Shipped Fast from Texas

US warehouse in Fort Worth, so orders move fast. TAA approved for government and defense.

Lifetime Warranty

Something goes wrong? Send a photo and your order number — same-day shipping on replacements.

The Devil Is in the Detail

Satin-finish wrenches, through-blade screwdrivers, heavy-gauge storage — built to last.

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