Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number U0311919 found under Valve Safety Relief by Jige International. The National Stock Number assigned to this part is 4820016255034, 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 U0311919.