Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WR400D1512B4-08 found under Disk Valve by Oic Valve Corp. The National Stock Number assigned to this part is 4820012652663, 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 WR400D1512B4-08.