Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number P2504 OF4 0404 OF1 0404 found under Hose Assembly Nonmetallic by Pirtek Bristol. The National Stock Number assigned to this part is 4720016639133, 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 P2504 OF4 0404 OF1 0404.