Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HV-216 ALUM found under Valve Safety Relief by Marine Acquisition Us Incorporated. The National Stock Number assigned to this part is 4820012442368, 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 HV-216 ALUM.