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Surubul autororant cu cap bombat drept si varf autoforant este fabricat din otel C1022, cu o duritate a miezului de 240-425 HV si a stratului superior de 550 MIN HV. Acesta este utilizat in fixarea profilelor metalice cu o grosime de pana la 2 mm. Capul tesit cu rizuri de fixare pe partea inferioara il fac optiunea ideala pentru fixarea profilelor constructiilor din gips-carton. Forta minima de rupere este de 3.5 Nm, iar viteza de insurubare recomandata este de 2500 RPM.