Review on VIGRUE 20 Grade Washers Assortment Pack by John Wei
Packaging says class 8 but screws have 3 grid markings for class 5
I couldn't find a standard for these screws. USA ASTM A193 Class 5B or Chinese GB standard. The packaging says class 8, but the screws are marked class 5. what they really are. I bought these to have on hand for general use so I don't care but wouldn't use them if class 5 or 8 is listed.
- Industrial & Scientific
- Not sure
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