Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4X1VB found under Nrp Video Switch As by Atlantic Research Corp. The National Stock Number assigned to this part is 5930016155636, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4X1VB.