Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 645 3791 PC5 found under Hose Assembly Metallic by Huntington Ingalls Incorporated. The National Stock Number assigned to this part is 4720012700801, 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 645 3791 PC5.