Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 230-0-001 REV B ITEM NO.2 found under Chain Roller by Maritime Applied Physics Corporation. The National Stock Number assigned to this part is 3020016022079, and the Federal Supply Class is 3020 Gear Pulley Sprocket And Transmission Chain. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 230-0-001 REV B ITEM NO.2.