Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1956AND1956R3AND1956A found under Installation Tool by Usm Corp. The National Stock Number assigned to this part is 5120001403140, and the Federal Supply Class is 5120 Hand Tools Nonedged Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1956AND1956R3AND1956A.