931 aviation grease is composed of composite lithium thickened high viscosity synthetic hydrocarbon lubricant and added with the appropriate amount of anti-oxidation, anti-wear, anti-rust additives, and structural improvers. It has good high and low-temperature performance, and anti-wear and anti-corrosion properties.

This product was originally produced by the Chinese Air Force Oil and Gas Research Institute, but now the unit has been abolished and is produced by Sinopec Petrochemical Research Institute.