Additional information

The commercial quality of steel grades A2 and A4 is property class 70 (tensile strength 700 N/mm²). Strength of the screw is indicated by the head marking and defined by the applicable product standard. Coating angle α in the screw body area approx. 90°. Edge zone (spray transition) up to 180°. Coating length l₁ = ~ 4 to 6 thread turns. Around 2 to 3 thread turns remain uncoated to ensure flawless installation (l₂).