M12-1.75X20 DIN 6921 Class 8 Point 8 Metric Flange Bolt Screw Non Serrated Zinc Rohs (Pack Qty 300) BC-M1220BF8

Primary use for Class 10.9 bolt is on truck cassis frames. The flange eliminates the need for a flat washer and helps compensate for a misaligned hole. When used with a proper class flange nut, the bolt system resists bolt slippage by distributing the clamp load over a wide area Class 8.8 carbon steel chemical composition: Carbon- 0.15 - 0.55%; Phosphorous- 0.35% max; Sulphur- 0.35% max Class alloy steel 10.9 chemical composition: Carbon- 0.20 - 0.55%; Phosphorous- 0.35% max; Sulphur- 0.35% max