Socket countersunk screw (conical head), Allen type, ISO 10.9 quality (100 kilos) "black" steel. Total thread, standard thread, diameter in 8mm, length (head included) 20 or 30mm. For strong screwing with tapered bearing seat and flush head. Minimum of order : 4 units.
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Applications : strong screwing with tapered bearing seat and flush head
Iso 10.9 is a high class of quality (resistance to shearing). In the common language, it corresponds to 100 kilos / mm². The Iso class is mentionned on the head of the bolt. Corresponding to the class 10 for the nuts. This class is adapted for high constraints.
Recommandations : Spray some lubricant (type WD40 or silicon grease) after installation to prevent from surface oxidation. You can slow down the screw using a thread locker resin (strong or medium depending on the needs).