
A2-70 vs A4-80: What the Bolt Head Marking Really Says
A2-70 vs A4-80 packs two facts into one code: the steel grade and the property class. What ISO 3506-1:2020 requires, and what the head must show.
نصائح وأدلة لتوضيح أبعاد منتجاتك بالصور

A2-70 vs A4-80 packs two facts into one code: the steel grade and the property class. What ISO 3506-1:2020 requires, and what the head must show.

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