Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1552 1 4IN PLAIN found under Stuffing Box And Bearing Rudder by Columbian Bronze Corp. The National Stock Number assigned to this part is 2040011416194, and the Federal Supply Class is 2040 Marine Hardware And Hull Items. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1552 1 4IN PLAIN.