T-5201-14-NGK

These modern NGK spark plugs can be used on both Model-T and Model-A

The Model T requires the T-5201-ADP adapter

Model A requires the A-12405-ADP adapter

Characteristics:

Contact pitch 0.035-0.038" (0.9-1.0mm)

Platinum plus
Key width: 20.8
Electrode distance mm: 0.9 mm
Tightening torque 28 Nm.
Tightening angle [degrees]: 90°
External thread mm: 14 mm
Thread pitch mm: 1.25 mm
Thread length mm: 19 mm
Spark position mm: 3 mm
Number of poles: 1-pole