Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 804 8533843 3 8 ITEM 10 found under Valve Ball by Premier Copper Division Of W And O. The National Stock Number assigned to this part is 4820015417314, 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 804 8533843 3 8 ITEM 10.