Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A11A56TJ2 found under Cylinder Assembly by Catching Engineering Co. The National Stock Number assigned to this part is 4210010413544, and the Federal Supply Class is 4210 Firefighting Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A11A56TJ2.