Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 0003943-0001 found under Air Filter Frame by Sms Technologies Inc. The National Stock Number assigned to this part is 7010012030662, and the Federal Supply Class is 7010 Adpe System Configuration. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 0003943-0001.