Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A51B52112-98 found under Rib Auxiliary Flap by Pratt And Whitney H A C Inc. The National Stock Number assigned to this part is 1560010379831, and the Federal Supply Class is 1560 Airframe Structural Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A51B52112-98.