Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1-NC344879 1-NC344895 4-NC344887 found under O Ring by Leslie Controls Inc. The National Stock Number assigned to this part is 5331012770163, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1-NC344879 1-NC344895 4-NC344887.