Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3-1 1-4 found under Elbow Railing by Hollaender Manufacturing Co The. The National Stock Number assigned to this part is 5670009892611, and the Federal Supply Class is 5670 Building Components Prefabricated. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3-1 1-4.