... 2093 material: 65Mn, 50CrV4 spring steel OD: 8.0mm to 600mm finish:plain,black,phosphate Product: disc spring 1. Material: 65Mn or ... 50CrV4 spring steel 2. Size : outer diameter: 8. ... specialize in retaining ring, circlips,disc spring ,hose clamps ,parallel key ,spring pin and so on.For good quality and after-sales, our ...