M6 - M20 Bulloni controsommersi vite presa bullone chiave a brugola DIN7991 nero grado 10,9

※ Standard: DIN7991. ※ Model: Countersunk head hexagon socket bolt. ※ Size: M6 M8 M10 M12 M16 M20. ※ Material: 10.9 grade carbon steel. The permissible size variation is: tolerance, but they all fall within the scope of the industry regulations.

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