Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WC1-760-3599 found under Valve Pneumatic Tank by Firestone Industrial Products Co Div. The National Stock Number assigned to this part is 4820016217696, 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 WC1-760-3599.