Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C5-19-876M O found under Hose Assembly Air Duct by Herbert Cooper Company Inc. The National Stock Number assigned to this part is 4720009335247, 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 C5-19-876M O.