PriceProtect™
DriveShield™
GarageGuard™
Services
Insurance
Car Insurance
Compare Car Insurance with Jerry
Jerry’s Expert Advice
Car Insurance Estimates
Home & Renters Insurance
Renters Insurance
Repairs
Car Repair Estimates
Repair Estimates for Popular Services
Advice
Read Car Content
Browse Jerry Car Advice
Check Out Expert Car QnA
Learn About How We Create Content
Jerry Data & Research
What is spark plug thread size and how do I find mine?
I need to replace my spark plugs and I’m confused about all the options. What is spark plug thread size and how do I find mine?
Bonnie Stinson · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
This is a great question! The spark plug thread size on most vehicles is 14mm, but you’ll need to check your owner’s manual to confirm.
The thread size is what screw the spark plugs into the cylinder head. When you see a set of numbers (like 14x1), the first number is the diameter and the second number is the pitch, or distance between each thread. It’s measured in millimeters.
Check your owner’s manual to find the specific measurement before you go shopping—or just let a
skilled mechanic
do the work for you!It sounds like you’ve got a good handle on
basic car maintenance
, but responsible car ownership also includes car insurance
. Unfortunately, most people are needlessly overpaying for coverage. Try the free Jerry
app to look for a cheaper rate in just 45 seconds.View full answer
- Gregory R.
WHY YOU CAN TRUST JERRY
Jerry partners with more than 50 insurance companies, but our content is independently researched, written, and fact-checked by our team of editors and agents. We aren’t paid for reviews or other content.
Join 4M+ members in lowering their car insurance
You Might Also Be Interested
Read Advice From Car Experts At Jerry
What Others Are Asking
Browse More Content
Insurance in Your State
Easiest way to compare and buy car insurance
No long forms
No spam or unwanted phone calls
Quotes from top insurance companies