Jiangsu Ying Yan Fastening System Technology Co.Ltd
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DIN933 ISO4017 EN24017 Hexagon Head Bolts - Full Thread Dacromet Carbon Steel/Alloy Steel Class 8.8 10.9
Characteristics:
High Corrosion Resistance: The Dacromet coating offers excellent corrosion resistance, providing up to 7-10 times more protection than traditional electrogalvanizing.
Good Heat Resistance: The coating maintains its integrity and performance even at temperatures up to 250°C, surpassing the heat resistance of traditional zinc coatings.
No Hydrogen Brittleness: The Dacromet process does not involve the production of hydrogen embrittlement, which makes it suitable for high-strength steel components.
High Penetration: The coating penetrates into fine pores of the base metal, creating a dense protective film.
Excellent Weatherability: The coating maintains its performance under various environmental conditions.
Strong Adhesion: The Dacromet coating adheres tightly to the base metal, preventing peeling or cracking.
Environmentally Friendly: The process of applying the Dacromet coating is environmentally safe.
Advantages:
Strong Binding Force: The Dacromet coating readily bonds to other metals, enhancing the overall strength and reliability of the bolted joint.
Excellent Corrosion Protection: The coating significantly extends the service life of bolts by protecting them from corrosion.
High Heat Resistance: Bolts with Dacromet coating can be used in high-temperature environments.
Aesthetic Appeal: The bolts have a smooth, uniform finish that adds to their visual appeal.
Applications:
DIN 933 bolts with Dacromet coating find applications in various industries requiring high corrosion and heat resistance, such as:
| Nominal Diameter | M2 | M2.5 | M3 | (M3.5) | M4 | M5 | M6 | (M7) | M8 | M10 | M12 | (M14) | M16 | |
| P | Pitch | 0.4 | 0.45 | 0.5 | 0.6 | 0.7 | 0.8 | 1 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 |
| k | Nominal Size | 1.4 | 1.7 | 2 | 2.4 | 2.8 | 3.5 | 4 | 4.8 | 5.3 | 6.4 | 7.5 | 8.8 | 10 |
| Grade A min | 1.28 | 1.58 | 1.88 | 2.28 | 2.68 | 3.35 | 3.85 | 4.65 | 5.15 | 6.22 | 7.32 | 8.62 | 9.82 | |
| Grade A max | 1.52 | 1.82 | 2.12 | 2.52 | 2.92 | 3.65 | 4.15 | 4.95 | 5.45 | 6.56 | 7.68 | 8.98 | 10.18 | |
| Grade B min | / | / | / | / | 2.6 | 3.26 | 3.76 | 4.56 | 5.06 | 6.11 | 7.21 | 8.51 | 9.71 | |
| Grade B max | / | / | / | / | 3 | 3.74 | 4.24 | 5.04 | 5.54 | 6.69 | 7.79 | 9.09 | 10.29 | |
| s | max=nominal size | 4 | 5 | 5.5 | 6 | 7 | 8 | 10 | 11 | 13 | 17 | 19 | 22 | 24 |
| Grade A min | 3.82 | 4.82 | 5.32 | 5.82 | 6.78 | 7.78 | 9.78 | 10.73 | 12.73 | 16.73 | 18.67 | 21.67 | 23.67 | |
| Grade B min | / | / | / | / | 6.64 | 7.64 | 9.64 | 10.57 | 12.57 | 16.57 | 18.48 | 21.16 | 23.16 | |
| e | Grade A min | 4.32 | 5.45 | 6.01 | 6.58 | 7.66 | 8.79 | 11.05 | 12.12 | 14.38 | 18.9 | 21.1 | 24.49 | 26.75 |
| Grade B min | / | / | / | / | 7.5 | 8.63 | 10.89 | 11.94 | 14.2 | 18.72 | 20.88 | 23.91 | 26.17 | |
| Nominal Diameter | (M18) | M20 | (M22) | M24 | (M27) | M30 | (M33) | M36 | (M39) | M42 | (M45) | M48 | (M52) | |
| P | Pitch | 2.5 | 2.5 | 2.5 | 3 | 3 | 3.5 | 3.5 | 4 | 4 | 4.5 | 4.5 | 5 | 5 |
| k | Nominal Size | 11.5 | 12.5 | 14 | 15 | 17 | 18.7 | 21 | 22.5 | 25 | 26 | 28 | 30 | 33 |
| Grade A min | 11.28 | 12.28 | 13.78 | 14.78 | / | / | / | / | / | / | / | / | / | |
| Grade A max | 11.72 | 12.72 | 14.22 | 15.22 | / | / | / | / | / | / | / | / | / | |
| Grade B min | 11.15 | 12.15 | 13.65 | 14.65 | 16.65 | 18.28 | 20.58 | 22.08 | 24.58 | 25.58 | 27.58 | 29.58 | 32.5 | |
| Grade B max | 11.85 | 12.85 | 14.35 | 15.35 | 17.35 | 19.12 | 21.42 | 22.92 | 25.42 | 26.42 | 28.42 | 30.42 | 33.5 | |
| s | max=nominal size | 27 | 30 | 32 | 36 | 41 | 46 | 50 | 55 | 60 | 65 | 70 | 75 | 80 |
| Grade A min | 26.67 | 29.67 | 31.61 | 35.38 | / | / | / | / | / | / | / | / | / | |
| Grade B min | 26.15 | 29.16 | 31 | 35 | 40 | 45 | 49 | 53.8 | 58.8 | 63.1 | 68.1 | 73.1 | 78.1 | |
| e | Grade A min | 30.14 | 33.53 | 35.72 | 39.98 | / | / | / | / | / | / | / | / | / |
| Grade B min | 29.56 | 32.95 | 35.03 | 39.55 | 45.2 | 50.85 | 55.37 | 60.79 | 66.44 | 71.3 | 76.95 | 82.6 | 88.25 | |