Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 212-0-005 REV -ITEM NO. 2 found under Valve Counterbalanc by Maritime Applied Physics Corporation. The National Stock Number assigned to this part is 4820016079416, 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 212-0-005 REV -ITEM NO. 2.