An infinite variety of dimensions is possible and specific inquiries should be made for unlisted sizes. Thicknesses shown relate to steel strip prior to cold rolling. Standard sizes are available in stock both Left Hand and Right Hand.
Pitch is the distance from one hill to the next measured parallel with the shaft.
Do not be concerned about minor variations in the pitch. An accurate measurement here means a closer fit. This dimension is measured at the shaft at the thickness part of the flight. Most sizes are stocked in standard and heavy duty. This is how many feet you need to the nearest foot, flighting is stocked in 5ft. lengths for ease in shipping.