Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 520 077 01 found under Parts Kit Linear Di by Raymond Corporation The. The National Stock Number assigned to this part is 4820015331367, 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 520 077 01.