This SAE Recommended Practice is intended to provide a uniform means of identification which may be used to classify the friction
coefficient of brake linings, based on data obtained from tests conducted in accordance with SAE J661. It is emphasized that this document
does not establish friction requirements for brake linings, nor does it designate significant characteristics of brake linings which must be
considered in overall brake performance. Due to other factors that include brake system design and operating environment, the friction
codes obtained from this document cannot reliably be used to predict brake system performance.
