Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AAF0372-20-10-31 found under Reamer Bushing Wing Pivot Fittin by Ace Drill Bushing Co Inc. The National Stock Number assigned to this part is 4920000080067, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AAF0372-20-10-31.