Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4253 99B10 found under Selector Assembly F by Consolidated Welding And. The National Stock Number assigned to this part is 2910008165785, and the Federal Supply Class is 2910 Engine Fuel System Components Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4253 99B10.