Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A1199J166 found under Cap Breather by The Timken Company. The National Stock Number assigned to this part is 2990001382205, and the Federal Supply Class is 2990 Miscellaneous Engine Accessories Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A1199J166.