Technical specifications:
Thread diameter 14mm
Thread length 12.7 mm
Pitch 1.25mm
for wrench size 21mm
Electrode gap 0.7mm
Unscrewable SAE connection
not undisturbed

Comparison numbers spark plugs

Bosch Beru NGK
W7AC 14-7A B6HS

NGK spark plug

High quality at an affordable price.

Details:

    from the number 1 original equipment manufacturer
    excellent ignitability
    long lifetime

Dimensions (approx.):
The following values ​​can be found in the article designation / in the selection field: thread Ø / thread length / hexagon wrench size - each in mm

ATTENTION - Installation note:
For a professional installation, spark plugs must always be installed with a suitable torque wrench.
In order to avoid damage caused by improper installation on the spark plug and thus on the engine, it is essential to tighten them to the following values:
Aluminum cylinder head = 15-20 Nm
Cast iron cylinder head = 15-25 Nm