Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ERG220 found under Bearing Roller Needle by Optex Systems Inc. The National Stock Number assigned to this part is 3110001203074, and the Federal Supply Class is 3110 Bearings Antifriction Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like ERG220.