Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number VL4513-104 found under by Vernay Laboratories Inc. The National Stock Number assigned to this part is 4820014967495, 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 VL4513-104.