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Recent content by JerryZhan11703233

  1. JerryZhan11703233

    the hardness of washer 140HV VS. 200HV.

    Dears, We know ISO7089, 7090 and 7092 standard provide three hardness classifications for washer grade: 140 HV, 200HV and 300HV. Could I replace a washer which is 140HV by a 200HV washer (the corresponding nominal size is same)? Many thanks. Jerry
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