Chainsaw chain specifications do not typically refer to the thickness of the drive links. Instead, chainsaw chain specifications typically include the following key parameters:

Pitch: The pitch is the distance between any three consecutive rivets on the chain, divided by two. It represents the distance the chain travels with each rotation of the drive sprocket. Common pitch sizes include 3/8 inch, 0.325 inch, and 0.404 inch, among others.

Gauge: The gauge refers to the thickness of the drive links. It is the measure of the portion of the drive link that fits into the guide bar groove. Common gauge sizes include 0.050 inch, 0.058 inch, and 0.063 inch.

Number of Drive Links: The number of drive links on a chainsaw chain is determined by the chain's length. It represents the total number of drive links in the chain.

These specifications are critical for ensuring that the chainsaw chain is compatible with the chainsaw's guide bar and drive sprocket. Matching the correct pitch, gauge, and drive link count to the chainsaw's specifications is essential for safe and efficient operation.

The thickness of the drive links (gauge) is a vital specification because it must match the groove width of the guide bar. If the gauge is incorrect, the chain will not fit properly in the guide bar groove, leading to poor cutting performance and potential safety issues. Therefore, it's crucial to select a chainsaw chain with the right gauge for your chainsaw model and guide bar.