Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 015957-000 found under Valve Vent by Saft America Inc. The National Stock Number assigned to this part is 4820014439772, 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 015957-000.