Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5598311-1 found under Holder Spring by Tactair Fluid Controls Inc. The National Stock Number assigned to this part is 5340013679450, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 5598311-1.