If not, spark plug sockets are individually available in different size varieties to match the spark plug, the most common size being the 5/8 inch size socket. Another common size is the 13/16 inch size socket. You’ll need to pick a relevant spark plug socket depending on the size of your spark plug.
Table of Contents
What size deep socket do I need for a spark plug?
If not, spark plug sockets are individually available in different size varieties to match the spark plug, the most common size being the 5/8 inch size socket. Another common size is the 13/16 inch size socket. You’ll need to pick a relevant spark plug socket depending on the size of your spark plug.

What size is a 14mm spark plug socket?
3/8″D
Features
Size | 3/8″D |
---|---|
Tool Type | Spark Plug Socket |
What are the 3 sizes of spark plug sockets?
Spark plugs come in different sizes. While there’s no standard size, most spark plugs will be either 5/8 inches or 13/16 inches. Specialized engines may also have other sizes.
Can I use deep socket for spark plugs?

no you don’t need a spark plug socket to remove and install spark plugs. A deep socket in the correct size will work in most cases, if enough patience is used and maybe some pliers to go along with the socket.
What size is a spark plug socket in MM?
Spark Plug Socket Size Chart
Spark Plug Size (inches) | Spark Plug Size (mm) | Socket Size (inches) |
---|---|---|
3/4 | 19 | 3/4 |
11/16 | 18 | 11/16 |
5/8 | 16 | 5/8 (16mm) |
9/16 | 14 | 9/16 |
Can I use a regular socket to remove spark plugs?
This is a pretty easy question to answer… no you don’t need a spark plug socket to remove and install spark plugs. A deep socket in the correct size will work in most cases, if enough patience is used and maybe some pliers to go along with the socket.
Can you take a spark plug out with pliers?
Needle-nose spark plug pliers: Removes spark plug wire boots in tight places. Pliers with serrated jaws lessen the chance of damaging a spark plug wire.
What size is a small engine spark plug?
Lawnmower engines usually use smaller thread sizes as compared to automobile engines. Most automobile engines use spark plugs with a thread size of about 14mm, whereas most lawn mower engines use spark plugs with a thread size of about 10 to 12mm.
What are the different spark plug sizes?
There are currently three spark plug thread diameter and pitch sizes used on motorcycles and ATVs: 10 mm x 1.0, 12 mm x 1.25 and 14 mm x 1.25. There are currently two thread reaches (lengths) used: 1/2 inch and 3/4 inch. Never use a spark plug of the wrong reach.