Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number KB404-120LG found under Hose Metallic by National Pipe Co. The National Stock Number assigned to this part is 4720002776549, 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 KB404-120LG.