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HEX SOCKET CAP SCREWS DIN7991 GRADE 10.9 12.9
HEX SOCKET CAP SCREWS DIN7991 GRADE 10.9 12.9
Bolt Standards:
DIN7991 - Hexagon socket countersunk head cap screws
Strength Grades:
10.9: Minimum tensile strength of 1000 N/mm²
12.9: Minimum tensile strength of 1200 N/mm²
Material and Properties:
Alloy steel
Provides high strength and hardness
Stainless steel
Austenitic (e.g. A2, A4) - Excellent corrosion resistance
Martensitic (e.g. 1.4006, 1.4021) - Good corrosion resistance and strength
Applications:
High-strength applications where a flush, low-profile fastener is required
Machinery, vehicles, equipment, structural connections
Corrosive environments (stainless steel versions)
Coatings and Finishes:
Plain (uncoated)
Zinc plated (for mild corrosion resistance)
Black oxide (for appearance)
Stainless steel bolts may have a passivation or polishing finish
Dimensions:
| for thread size | d | M3 | M4 | M5 | M6 | M8 | M10 | M12 | (M14) | M16 | (M18) | M20 | (M22) | M24 |
| p | thread pitch | 0.5 | 0.7 | 0.8 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 2.5 | 2.5 | 3 | |
| d(k) | max | 6 | 8 | 10 | 12 | 16 | 20 | 24 | 27 | 30 | 33 | 36 | 36 | 39 |
| max | 5.7 | 7.64 | 9.64 | 11.57 | 15.57 | 19.48 | 23.48 | 26.48 | 29.48 | 32.38 | 35.38 | 35.38 | 38.38 | |
| s | DN | 2 | 2.5 | 3 | 4 | 5 | 6 | 8 | 10 | 10 | 12 | 12 | 14 | 14 |
| max | 2.1 | 2.6 | 3.1 | 4.12 | 5.14 | 6.14 | 8.175 | 10.18 | 10.18 | 12.21 | 12.21 | 14.21 | 14.21 | |
| min | 2.02 | 2.52 | 3.02 | 4.02 | 5.02 | 6.02 | 8.025 | 10.03 | 10.03 | 12.03 | 12.03 | 14.03 | 14.03 | |
| t | max | 1.2 | 1.8 | 2.3 | 2.5 | 3.5 | 4.4 | 4.6 | 4.8 | 5.3 | 5.5 | 5.9 | 8.8 | 10.3 |
| min | 0.95 | 1.55 | 2.05 | 2.25 | 3.2 | 4.1 | 4.3 | 4.5 | 5 | 5.2 | 5.6 | 8.44 | 9.87 | |
| α | min | 92° | 92° | 92° | 92° | 92° | 92° | 92° | 92° | 92° | 92° | 92° | 62° | 62° |
| max | 90° | 90° | 90° | 90° | 90° | 90° | 90° | 90° | 90° | 90° | 90° | 60° | 60° |