Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AT259J found under Dimpling Squeezer Hot Portable by Snap On Incorporated. The National Stock Number assigned to this part is 3450011106496, and the Federal Supply Class is 3450 Machine Tools Portable. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AT259J.