Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CB 00553 1D500A found under Template Firewall H by Pall Aeropower Corporation. The National Stock Number assigned to this part is 1680013829792, and the Federal Supply Class is 1680 Miscellaneous Aircraft Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like CB 00553 1D500A.