Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A54-3800E57 found under Carrier Differentia by Meritor Heavy Vehicle Systems Llc. The National Stock Number assigned to this part is 2520000712167, and the Federal Supply Class is 2520 Vehicular Power Transmission Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A54-3800E57.