Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number YZ100955 found under Valve Ball by Funk Mfg Co. The National Stock Number assigned to this part is 4820013432847, 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 YZ100955.