... stainless steel size: M3-M300 finish:black,plain,phosphate retaining ring for shaft ISO9001:2000 certificate SizeM3-M300StandardDIN471Materialcarbon steel, stainless ... produced according to the sample or drawings we specialize in retaining ring, circlips,disc spring ,hose clamps ,parallel key , ... spring pin and so on.For good quality and after-sales, our products have ...