Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 204-70118-4 found under Roller Linear Rotary Motion by Mamco Mfg Co Inc. The National Stock Number assigned to this part is 3120010185989, 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 204-70118-4.