Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number KF2 40-43 found under Spring Helical Compression by Krupp Mak Co. The National Stock Number assigned to this part is 5360013484813, 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 KF2 40-43.