Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number J3-8019 found under Ring Piston by Precision Rings Incorporated. The National Stock Number assigned to this part is 3040010332890, and the Federal Supply Class is 3040 Miscellaneous Power Transmission Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like J3-8019.