Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3418502037 found under Valve Pressure Equalizing Gaseou by Bosch Robert Corp. The National Stock Number assigned to this part is 4820014071908, 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 3418502037.