Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 161313-03 found under Housing Oil Pump Assembly Nonair by Hydroid Inc. The National Stock Number assigned to this part is 2990016573414, 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 161313-03.