Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3216 found under Guide Sleeve Valve by Bae Systems Operations Limited Dba Bae Systems Plc. The National Stock Number assigned to this part is 4820013083013, 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 3216.