Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PPVL720BXB059 found under Valve Relief Pressu by Betts Industries Inc. The National Stock Number assigned to this part is 4820016085360, 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 PPVL720BXB059.