Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PL7-4-427.0 REF 72 found under Valve Check by Link Belt Construction Equipment. The National Stock Number assigned to this part is 4820014474238, 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 PL7-4-427.0 REF 72.