Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12517 ITEM 19 found under Bushing Sleeve by Northern Line Machine Div Of Com. The National Stock Number assigned to this part is 3120012652458, and the Federal Supply Class is 3120 Bearings Plain Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 12517 ITEM 19.