Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R757 found under Nonmetallic Special Shaped Secti by Marysville Marine Distributors Inc. The National Stock Number assigned to this part is 9390007373333, 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 R757.