Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12355 found under Drill Twist by Magna Div Vermont American Corp. The National Stock Number assigned to this part is 5133010537932, and the Federal Supply Class is 5133 Drill Bits Counterbores And Countersinks Hand And Machine. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 12355.