Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3A3-58 found under Spring Leaf by Hutchens Industries Inc. The National Stock Number assigned to this part is 5360000057664, and the Federal Supply Class is 5360 Coil Flat Leaf And Wire Springs. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3A3-58.