M6X50
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Sold in sets of 25
One thing that’s nice about the ISO 898-1 property class designations is that the approximate tensile strength is right there on the bolt head marking. Property Class 8.8 bolts and screws have a minimum tensile strength of 800 MPa for bolts and screws 16mm in diameter and under, and 830 MPa for bolts and screws with a diameter over 16mm.  So a Property Class 8.8 bolt or screw is a medium-strength fastener that’s roughly the same strength as an SAE J429 Grade 5 fastener.
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