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Grade 8.8, 10.9, and 12.9 high tensile set screws are widely used in industrial machinery, automotive, and construction industries, where high tensile strength is required.
These high-strength steel set screws are made of carbon steel and heat-treated for added strength. They provide reliable, long-lasting performance, ensuring secure fastening and preventing loosening under vibration or stress.
| Screw Thread | M1.4 | M1.6 | (M1.8) | M2 | M2.5 | M3 | M4 | M5 | M6 | ||||
| d | |||||||||||||
| P | Pitch | 0.3 | 0.35 | 0.35 | 0.4 | 0.45 | 0.5 | 0.7 | 0.8 | 1 | |||
| dp | max | 0.7 | 0.8 | 0.9 | 1 | 1.5 | 2 | 2.5 | 3.5 | 4 | |||
| min | 0.45 | 0.55 | 0.65 | 0.75 | 1.25 | 1.75 | 2.25 | 3.2 | 3.7 | ||||
| e | min | 0.803 | 0.803 | 0.803 | 1.003 | 1.427 | 1.73 | 2.3 | 2.87 | 3.44 | |||
| s | Nominal Size | 0.7 | 0.7 | 0.7 | 0.9 | 1.3 | 1.5 | 2 | 2.5 | 3 | |||
| max | 0.724 | 0.724 | 0.724 | 0.902 | 1.295 | 1.545 | 2.045 | 2.56 | 3.08 | ||||
| min | 0.711 | 0.711 | 0.711 | 0.889 | 1.27 | 1.52 | 2.02 | 2.52 | 3.02 | ||||
| t | min | short | 0.6 | 0.7 | 0.8 | 0.8 | 1.2 | 1.2 | 1.5 | 2 | 2 | ||
| long | 1.4 | 1.5 | 1.6 | 1.7 | 2 | 2 | 2.5 | 3 | 3.5 | ||||
| L0 ① | Nominal Size | 2 | 2.5 | 2.5 | 3 | 3 | 4 | 5 | 6 | 6 | |||
| Weight of per 1000 steel products(≈kg) | - | - | - | - | - | - | - | - | - | ||||
| Screw Thread | M8 | M10 | M12 | (M14) | M16 | (M18) | M20 | (M22) | M24 | ||||
| d | |||||||||||||
| P | Pitch | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 2.5 | 2.5 | 3 | |||
| dp | max | 5.5 | 7 | 8.5 | 10 | 12 | 13 | 15 | 17 | 18 | |||
| min | 5.2 | 6.64 | 8.14 | 9.64 | 11.57 | 12.57 | 14.57 | 16.57 | 17.57 | ||||
| e | min | 4.58 | 5.72 | 6.86 | 6.86 | 9.15 | 11.43 | 11.43 | 13.72 | 13.72 | |||
| s | Nominal Size | 4 | 5 | 6 | 6 | 8 | 10 | 10 | 12 | 12 | |||
| max | 4.095 | 5.095 | 6.095 | 6.095 | 8.115 | 10.115 | 10.115 | 12.142 | 12.142 | ||||
| min | 4.02 | 5.02 | 6.02 | 6.02 | 8.025 | 10.025 | 10.025 | 12.032 | 12.032 | ||||
| t | min | short | 3 | 4 | 4.8 | 5.6 | 6.4 | 7.2 | 8 | 9 | 10 | ||
| long | 5 | 6 | 8 | 9 | 10 | 11 | 12 | 13.5 | 15 | ||||
| L0 ① | Nominal Size | 6 | 8 | 12 | 14 | 16 | 16 | 16 | 18 | 20 | |||
| Weight of per 1000 steel products(≈kg) | - | - | - | - | - | - | - | - | - | ||||
| ①,When L ≤ L0, it is a short screw; When L>L0, it is a long screw. | |||||||||||||
| Screw Thread | M1.4 | M1.6 | (M1.8) | M2 | M2.5 | M3 | M4 | M5 | M6 | ||||
| d | |||||||||||||
| P | Pitch | 0.3 | 0.35 | 0.35 | 0.4 | 0.45 | 0.5 | 0.7 | 0.8 | 1 | |||
| dt | max | - | - | - | - | - | - | - | - | 1.5 | |||
| min | - | - | - | - | - | - | - | - | 0.9 | ||||
| e | min | 0.803 | 0.803 | 0.803 | 1.003 | 1.427 | 1.73 | 2.3 | 2.87 | 3.44 | |||
| s | Nominal Size | 0.7 | 0.7 | 0.7 | 0.9 | 1.3 | 1.5 | 2 | 2.5 | 3 | |||
| max | 0.724 | 0.724 | 0.724 | 0.902 | 1.295 | 1.545 | 2.045 | 2.56 | 3.08 | ||||
| min | 0.711 | 0.711 | 0.711 | 0.889 | 1.27 | 1.52 | 2.02 | 2.52 | 3.02 | ||||
| t | min | short | 0.6 | 0.7 | 0.8 | 0.8 | 1.2 | 1.2 | 1.5 | 2 | 2 | ||
| long | 1.4 | 1.5 | 1.6 | 1.7 | 2 | 2 | 2.5 | 3 | 3.5 | ||||
| L0 ② | Nominal Size | 2 | 2.5 | 2.5 | 2.5 | 3 | 3 | 4 | 5 | 6 | |||
| Weightof per 1000 steel products(≈kg) | - | - | - | - | - | - | - | - | - | ||||
| Screw Thread | M8 | M10 | M12 | (M14) | M16 | (M18) | M20 | (M22) | M24 | ||||
| d | |||||||||||||
| P | Pitch | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 2.5 | 2.5 | 3 | |||
| dt | max | 2 | 2.5 | 3 | 4 | 4 | 5 | 5 | 6 | 6 | |||
| min | 1.4 | 1.9 | 2.4 | 3.25 | 3.25 | 4.25 | 4.25 | 5.25 | 5.25 | ||||
| e | min | 4.58 | 5.72 | 6.86 | 6.86 | 9.15 | 11.43 | 11.43 | 13.72 | 13.72 | |||
| s | Nominal Size | 4 | 5 | 6 | 6 | 8 | 10 | 10 | 12 | 12 | |||
| max | 4.095 | 5.095 | 6.095 | 6.095 | 8.115 | 10.115 | 10.115 | 12.142 | 12.142 | ||||
| min | 4.02 | 5.02 | 6.02 | 6.02 | 8.025 | 10.025 | 10.025 | 12.032 | 12.032 | ||||
| t | min | short | 3 | 4 | 4.5 | 5.6 | 6.4 | 7.2 | 8 | 9 | 10 | ||
| long | 5 | 6 | 8 | 9 | 10 | 11 | 12 | 13.5 | 15 | ||||
| L0 ② | Nominal Size | 8 | 10 | 12 | 12 | 16 | 18 | 18 | 25 | 25 | |||
| Weightof per 1000 steel products(≈kg) | - | - | - | - | - | - | - | - | - | ||||
| ①,df ≈Minor thread diameter | |||||||||||||
| ②,When L ≤ L0, it is a short screw; When L>L0, it is a long screw. | |||||||||||||
| Screw Thread | M1.4 | M1.6 | (M1.8) | M2 | M2.5 | M3 | M4 | M5 | M6 | ||||
| d | |||||||||||||
| P | Pitch | 0.3 | 0.35 | 0.35 | 0.4 | 0.45 | 0.5 | 0.7 | 0.8 | 1 | |||
| dp | max | 0.7 | 0.8 | 0.9 | 1 | 1.5 | 2 | 2.5 | 3.5 | 4 | |||
| min | 0.45 | 0.55 | 0.65 | 0.75 | 1.25 | 1.75 | 2.25 | 3.2 | 3.7 | ||||
| s | Nominal Size | 0.7 | 0.7 | 0.7 | 0.9 | 1.3 | 1.5 | 2 | 2.5 | 3 | |||
| max | 0.724 | 0.724 | 0.724 | 0.902 | 1.295 | 1.545 | 2.045 | 2.56 | 3.06 | ||||
| min | 0.711 | 0.711 | 0.711 | 0.889 | 1.27 | 1.52 | 2.02 | 2.52 | 3.02 | ||||
| t | min | short | 0.6 | 0.7 | 0.8 | 0.8 | 1.2 | 1.2 | 1.5 | 2 | 2 | ||
| long | 1.4 | 1.5 | 1.6 | 1.7 | 2 | 2 | 2.5 | 3 | 3.5 | ||||
| z | short | max | 0.65 | 0.65 | 0.65 | 0.75 | 0.88 | 1 | 1.25 | 1.5 | 1.75 | ||
| min | 0.4 | 0.4 | 0.5 | 0.5 | 0.63 | 0.75 | 1 | 1.25 | 1.5 | ||||
| long | max | 1.05 | 1.05 | 1.25 | 1.25 | 1.5 | 1.75 | 2.25 | 2.75 | 3.25 | |||
| min | 0.8 | 0.8 | 1 | 1 | 1.25 | 1.5 | 2 | 2.5 | 3 | ||||
| e | min | 0.803 | 0.803 | 0.803 | 1.003 | 1.427 | 1.73 | 2.3 | 2.87 | 3.44 | |||
| L0 ② | Nominal Size | 2 | 2.5 | 3 | 3 | 4 | 5 | 6 | 6 | 8 | |||
| Weight of per 1000 steel products(≈kg) | - | - | - | - | - | - | - | - | - | ||||
| Screw Thread | M8 | M10 | M12 | (M14) | M16 | (M18) | M20 | (M22) | M24 | ||||
| d | |||||||||||||
| P | Pitch | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 2.5 | 2.5 | 3 | |||
| dp | max | 5.5 | 7 | 8.5 | 10 | 12 | 13 | 15 | 17 | 18 | |||
| min | 5.2 | 6.64 | 8.14 | 9.64 | 11.57 | 12.57 | 14.57 | 16.57 | 17.57 | ||||
| s | Nominal Size | 4 | 5 | 6 | 6 | 8 | 10 | 10 | 12 | 12 | |||
| max | 4.095 | 5.095 | 6.095 | 6.095 | 8.115 | 10.115 | 10.115 | 12.142 | 12.142 | ||||
| min | 4.02 | 5.02 | 6.02 | 6.02 | 8.025 | 10.025 | 10.025 | 12.032 | 12.032 | ||||
| t | min | short | 3 | 4 | 4.8 | 5.6 | 6.4 | 7.2 | 8 | 9 | 10 | ||
| long | 5 | 6 | 8 | 9 | 10 | 11 | 12 | 13.5 | 15 | ||||
| z | short | max | 2.25 | 2.75 | 3.25 | 3.8 | 4.3 | 4.8 | 5.3 | 5.8 | 6.3 | ||
| min | 2 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | ||||
| long | max | 4.3 | 5.3 | 6.3 | 7.36 | 8.36 | 9.86 | 10.36 | 11.43 | 12.43 | |||
| min | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | ||||
| e | min | 4.58 | 5.72 | 6.86 | 6.86 | 9.15 | 11.43 | 11.43 | 13.72 | 13.72 | |||
| L0 ② | Nominal Size | 10 | 12 | 16 | 20 | 20 | 25 | 25 | 30 | 30 | |||
| Weight of per 1000 steel products(≈kg) | - | - | - | - | - | - | - | - | - | ||||
| ①,df ≈ Minor thread diameter | |||||||||||||
| ②,When L ≤ L0, it is a short screw; When L>L0, it is a long screw. | |||||||||||||
| Thread Size | M1.4 | M1.6 | (M1.8) | M2 | M2.5 | M3 | M4 | M5 | M6 | ||||
| d | |||||||||||||
| P | Pitch | 0.3 | 0.35 | 0.35 | 0.4 | 0.45 | 0.5 | 0.7 | 0.8 | 1 | |||
| dz | max | 0.7 | 0.8 | 0.9 | 1 | 1.2 | 1.4 | 2 | 2.5 | 3 | |||
| min | 0.45 | 0.55 | 0.65 | 0.75 | 0.95 | 1.15 | 1.75 | 2.25 | 2.75 | ||||
| s | Nominal Size | 0.7 | 0.7 | 0.7 | 0.9 | 1.3 | 1.5 | 2 | 2.5 | 3 | |||
| max | 0.724 | 0.724 | 0.724 | 0.902 | 1.295 | 1.545 | 2.045 | 2.56 | 3.08 | ||||
| min | 0.711 | 0.711 | 0.711 | 0.889 | 1.27 | 1.52 | 2.02 | 2.52 | 3.02 | ||||
| t | min | short | 0.6 | 0.7 | 0.8 | 0.8 | 1.2 | 1.2 | 1.5 | 2 | 2 | ||
| long | 1.4 | 1.5 | 1.6 | 1.7 | 2 | 2 | 2.5 | 3 | 3.5 | ||||
| e | min | 0.803 | 0.803 | 0.803 | 1.003 | 1.427 | 1.73 | 2.3 | 2.87 | 3.44 | |||
| L0 ① | Nominal Size | 2 | 2 | 2.5 | 2.5 | 3 | 4 | 5 | 5 | 6 | |||
| Weight of per 1000 steel products(≈kg) | - | - | - | - | - | - | - | - | - | ||||
| Thread Size | M8 | M10 | M12 | (M14) | M16 | (M18) | M20 | (M22) | M24 | ||||
| d | |||||||||||||
| P | Pitch | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 2.5 | 2.5 | 3 | |||
| dz | max | 5 | 6 | 8 | 9 | 10 | 12 | 14 | 16 | 16 | |||
| min | 4.7 | 5.7 | 7.64 | 8.64 | 9.64 | 11.57 | 13.57 | 15.57 | 15.57 | ||||
| s | Nominal Size | 4 | 5 | 6 | 6 | 8 | 10 | 10 | 12 | 12 | |||
| max | 4.095 | 5.095 | 6.095 | 6.095 | 8.115 | 10.115 | 10.115 | 12.142 | 12.142 | ||||
| min | 4.02 | 5.02 | 6.02 | 6.02 | 8.025 | 10.025 | 10.025 | 12.032 | 12.032 | ||||
| t | min | short | 3 | 4 | 4.8 | 5.6 | 6.4 | 7.2 | 8 | 9 | 10 | ||
| long | 5 | 6 | 8 | 9 | 10 | 11 | 12 | 13.5 | 15 | ||||
| e | min | 4.58 | 5.72 | 6.86 | 6.86 | 9.15 | 11.43 | 11.43 | 13.72 | 13.72 | |||
| L0 ① | Nominal Size | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 25 | |||
| Weight of per 1000 steel products(≈kg) | - | - | - | - | - | - | - | - | - | ||||
| ①,When L ≤ L0, it is a short screw; When L>L0, it is a long screw. | |||||||||||||
Befast’s high-strength set screws in grades 8.8, 10.9, and 12.9 are engineered for superior performance in demanding environments. These screws are made from high-quality carbon steel, offering exceptional tensile strength and reliability.
Their heat-treated design ensures optimal durability, making them ideal for industries requiring heavy-duty fastening solutions. Additionally, their superior resistance to corrosion and wear ensures a long service life, reducing the need for frequent replacements. By choosing Befast’s set screws, you gain dependable and cost-effective solutions for your fastening needs.
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