Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 313112-003 found under Check Valve And Tub by Imi Cornelius Inc. The National Stock Number assigned to this part is 4820011927190, 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 313112-003.