Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A56JA55 found under Nut Chuck Jack Hamm by Ingersoll Rand Inc. The National Stock Number assigned to this part is 5310003545886, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A56JA55.