Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 54000 40181 found under Circuit Card Assembly by Aai Corporation. The National Stock Number assigned to this part is 5998000090817, and the Federal Supply Class is 5998 Electrical And Electronic Assemblies Boards Cards And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 54000 40181.