Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number LR1561-2 found under Seal Stern Tube by Rite Industries Inc. The National Stock Number assigned to this part is 5330001989399, and the Federal Supply Class is 5330 Packing And Gasket Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like LR1561-2.