17H1605 / S220-2A Nuffield Spark Plug for petrol TVO Nuffield tractors with the Morris Commercial ETA and ETB four cylinder engines.

Also fitted to 1940’s Morris Commercial military trucks during the Second World War and Austin and Morris trucks of the same era.

Specification: ¹/₂” inch short reach. 18mm diameter thread. ⁷/₈” UNF spanner size.

See item number 25 in the illustration.

Fitted to tractors:

• Nuffield M3, M4, MV3