Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 99042101 found under Valve Bleeder Hydraulic System by Fluid Line Products Incorporated. The National Stock Number assigned to this part is 4820015133153, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 99042101.