Dowel Pin / Parallel Pin DIN 7979 D / ISO 8735 With air vent.Standard sizes.Tolerance: m6 / M6, h7 / H7, etc. Hardness: HRC 58-62, HV 550-650. Material: Bearing Steel GCr15 / SAE52100, 100Cr6.Stainless steel 304 / A2, 316 / A4.Surface Finish: Plain, Plating.Size, thickness, style or other specifications can be designed according to your drawings or samples.