Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FF 1 75IPS found under Valve Vent by Haywardindl Products Inc. The National Stock Number assigned to this part is 4820014581426, 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 FF 1 75IPS.