Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number F151643 ITEM 4 found under Valve Ball by Oldenburg Group Incorporated. The National Stock Number assigned to this part is 4810016269215, and the Federal Supply Class is 4810 Valves Powered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like F151643 ITEM 4.