Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 312864-1044 found under Guide Valve Stem by The Babcock And Wilcox Company. The National Stock Number assigned to this part is 4820008568402, 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 312864-1044.