Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 54691 found under Pipe Exhaust by Ap Parts Co. The National Stock Number assigned to this part is 2990011576317, 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 54691.