Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 690K87 found under Parts Kit Valve by Ross Operating Valve Co. The National Stock Number assigned to this part is 4820012889695, 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 690K87.