Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AR2-0502 found under Parts Kit Pressure Regulating Va by Marine Electronics Inc. The National Stock Number assigned to this part is 4820000804440, 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 AR2-0502.