Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2258-K-1259 found under Spring Flat by Carlisle Industrial Brake. The National Stock Number assigned to this part is 5360013831583, 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 2258-K-1259.