Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5912 23 found under Poppet by Parker Hannifin Ltd. The National Stock Number assigned to this part is 2990011885592, and the Federal Supply Class is 2990 Miscellaneous Engine Accessories Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 5912 23.