Compression Springs AQS manufactures compression springs from a wide range of wire types and sizes. We can coil springs from wire as small as 0.004" (0.1mm) diameter to as large as 0.750" (19.0mm) diameter. We have in-house grinding, heat treating, pre-setting, and shot peening capabilities. We utilize both conventional coiling and CNC coiling equipment with in-line, conveyor stress relieving ovens.