Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AK1639S-FL4SE01A found under Ground Cloth by Alaska Structures Inc. The National Stock Number assigned to this part is 5410015497303, and the Federal Supply Class is 5410 Prefabricated And Portable Buildings. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AK1639S-FL4SE01A.