Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 64203 found under Nonmetallic Channel by Young Windows Inc. The National Stock Number assigned to this part is 9390011185082, and the Federal Supply Class is 9390 Miscellaneous Fabricated Nonmetallic Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 64203.