Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 57-001-11-3IN found under Hinge Swing Check V by Pima Valveinc. The National Stock Number assigned to this part is 4820014814473, 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 57-001-11-3IN.