Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 0103300 found under Valve Check by M K T Manufacturing Inc. The National Stock Number assigned to this part is 4820008718384, 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 0103300.