Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 46-310 found under Cock Poppet Drain by Midland Metal Manufacturing Company. The National Stock Number assigned to this part is 4820015385042, 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 46-310.