Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B77405-2 found under Hose Assembly Nonmetallic by William S Guttenberg. The National Stock Number assigned to this part is 4720001395421, and the Federal Supply Class is 4720 Hose And Flexible Tubing. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like B77405-2.