Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AT254DA-6 found under Die Metal Punching Machine by Snap On Incorporated. The National Stock Number assigned to this part is 3456012830744, and the Federal Supply Class is 3456 Cutting And Forming Tools For Secondary Metalworking Machinery. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AT254DA-6.