This Document specifies the main characteristics and dimensions of spark plugs, including the dimensions of the terminals and cylinder head mounting holes. This Document applies to spark plugs for spark-ignition engines, and their application is not limited to road vehicles. This Document does not apply to shielded or waterproof spark plugs.
Basic Data
Standard ID
GB/T 6791-2025 (GB/T6791-2025)
Description (Translated English)
Road vehicles - Spark-plugs and their cylinder head housings - Basic characteristics and dimensions
Sector / Industry
National Standard (Recommended)
Classification of Chinese Standard
T37
Classification of International Standard
43.060
Word Count Estimation
30,392
Date of Issue
2025-10-31
Date of Implementation
2026-05-01
Older Standard (superseded by this standard)
GB/T 6791-2012
Issuing agency(ies)
State Administration for Market Regulation, Standardization Administration of China
