Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 15F-2C-2.50IN found under Valve Gate by William E Williams Valve Corp. The National Stock Number assigned to this part is 4820015820907, 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 15F-2C-2.50IN.