Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5893818 found under Valve Check by O T S I. The National Stock Number assigned to this part is 4820012694689, 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 5893818.