Batch of spark plugs

A method for producing a batch of spark plugs, wherein each spark plug of the batch has a longitudinal axis, a central electrode oriented in a direction of the longitudinal axis, a ground electrode oriented at an angle to the longitudinal axis such that a spark gap is formed between a tip of the central electrode and a tip of the ground electrode, and an outer thread for screwing the spark plug in the longitudinal direction into an inner thread of a cylinder head of a combustion chamber of an internal combustion engine, and has an annular contact surface which is oriented perpendicularly to the longitudinal axis and is intended for bringing the spark plug to rest against the cylinder head, wherein for all spark plugs of the batch, after the spark plugs has been screwed into the inner threads of the cylinder head as intended, the ground electrodes have the same orientation with regard to a rotation about the longitudinal axis of the spark plug relative to the combustion chamber, the method comprising:

• providing, for each of the spark plugs, the outer thread and/or the ground electrode with an individually arbitrary orientation with regard to a rotation about the longitudinal axis of the spark plug,
• wherein the ground electrode is situated within a level of the outer thread.