Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3311381 found under Retainer Bearing by Calabrese And Sons Inc. The National Stock Number assigned to this part is 4620003393153, and the Federal Supply Class is 4620 Water Distillation Equipment Marine And Industrial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3311381.