Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 61315-04H-1974 found under Non Return Valve by Man B And W Diesel Ltd. The National Stock Number assigned to this part is 4820222691583, 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 61315-04H-1974.