Hot Products
0102030405
China Suppliers Factory External Hexagonal Bolt Din M8-M16 8.8s Strength for Various Applications
📌 Thread Specifications — M10 to M24
| Thread specifications d |
M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 | |
| P | Pitch | 1.50 | 1.75 | 2.0 | 2.0 | 2.5 | 2.5 | 2.5 | 3 |
| b | L≤125 | 26 | 30 | 34 | 38 | 42 | 46 | 50 | 54 |
| 125＜L≤200 | 32 | 36 | 40 | 44 | 48 | 52 | 56 | 60 | |
| L＞200 | / | / | / | 57 | 61 | 65 | 69 | 73 | |
| ds | Max | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 |
| Min | 9.64 | 11.57 | 13.57 | 15.57 | 17.57 | 19.48 | 21.48 | 23.48 | |
| e | Min | 19.68 | 22.58 | 25.94 | 29.3 | 32.66 | 36.96 | 39.2 | 44.8 |
| k | Max | 6.69 | 7.79 | 9.09 | 10.29 | 11.85 | 12.85 | 14.35 | 15.35 |
| Min | 6.11 | 7.21 | 8.51 | 9.71 | 11.15 | 12.15 | 13.65 | 14.65 | |
| s | Max | 18 | 21 | 24 | 27 | 30 | 34 | 36 | 41 |
| Min | 17.57 | 20.16 | 23.16 | 26.16 | 29.16 | 33 | 35 | 40 | |
| 1,000 pieces of steel weigh ≈ kg | - | - | - | - | - | - | - | - | |
📌 Thread Specifications — M27 to M48
| Thread specifications d |
M27 | M30 | M33 | M36 | M39 | M42 | M45 | M48 | |
| P | Pitch | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| b | L≤125 | 60 | 66 | 72 | 78 | 84 | 90 | 96 | 102 |
| 125＜L≤200 | 66 | 72 | 78 | 84 | 90 | 96 | 102 | 108 | |
| L＞200 | 79 | 85 | 91 | 97 | 103 | 109 | 115 | 121 | |
| ds | Max | 27 | 30 | 33 | 36 | 39 | 42 | 45 | 48 |
| Min | 26.48 | 29.48 | 32.38 | 35.38 | 38.38 | 41.38 | 44.38 | 47.38 | |
| e | Min | 50.4 | 54.9 | 60.3 | 65.9 | 71.5 | 71.5 | 76.3 | 81.9 |
| Min | Min | 17.35 | 19.12 | 21.42 | 22.92 | 25.42 | 26.42 | 28.42 | 30.42 |
| Min | Min | 16.65 | 18.28 | 20.58 | 22.08 | 24.58 | 25.58 | 27.58 | 29.58 |
| s | Max | 46 | 50 | 55 | 60 | 65 | 65 | 70 | 75 |
| Min | 45 | 49 | 53.8 | 58.8 | 63.8 | 63.8 | 68.1 | 73.1 | |
| 1,000 pieces of steel weigh ≈ kg | - | - | - | - | - | - | - | - | |
External hexagonal bolts are a common type of mechanical fastener, mainly used for connecting and fixing mechanical equipment.
⚙ External Hexagonal Bolts Are Commonly Used For:
🔗
1. Connecting Components
The outer hexagonal bolt fixes multiple components together through the action of torque, forming a whole.
💪
2. Load Bearing
Due to its high-strength design, the outer hexagonal bolt can withstand large loads and shear forces, and is not easy to break or loosen, ensuring the firmness of the connection.
🔧
3. Easy Installation
No special fixtures or tools are required during installation, it can be completed with a wrench or wrench, and the installation speed is fast, which can improve production efficiency.
🌎
4. Wide Application Range
External hexagonal bolts are suitable for various connection situations, such as heavy machinery, construction, and bridge engineering, and can meet various connection requirements.
❓ Frequently Asked Questions
Q
What is an external hexagonal bolt and how does it differ from other bolt types?
An external hexagonal bolt (hex bolt) features a six-sided head that allows tightening with a standard wrench or socket tool. Unlike internal hex (Allen) bolts, the external head provides greater torque application and is easier to use in heavy-duty industrial environments.
Q
What thread sizes are available for external hexagonal bolts?
External hexagonal bolts are available in a wide range of metric thread sizes, from M10 up to M48 and beyond. Common sizes include M10, M12, M14, M16, M18, M20, M22, M24, M27, M30, M33, M36, M39, M42, M45, and M48, each with specific pitch and dimension tolerances.
Q
What materials are external hexagonal bolts typically made from?
External hexagonal bolts are most commonly manufactured from carbon steel, alloy steel, and stainless steel. The choice of material depends on the application requirements, including load capacity, corrosion resistance, and environmental conditions.
Q
What industries commonly use external hexagonal bolts?
External hexagonal bolts are widely used across many industries, including heavy machinery manufacturing, construction, bridge engineering, automotive assembly, steel structures, and general mechanical equipment. Their versatility makes them one of the most universally applied fasteners.
Q
How do I select the correct bolt length (L) for my application?
The correct bolt length depends on the total thickness of the materials being joined plus the required thread engagement. As shown in the specification tables, the thread length (b) varies based on the total bolt length (L≤125, 125<L≤200, or L>200), so always verify both the grip length and thread engagement when selecting a bolt.
Q
What tools are needed to install external hexagonal bolts?
Installation of external hexagonal bolts requires no special fixtures. A standard open-end wrench, combination wrench, or socket wrench is sufficient. For high-torque applications, a torque wrench is recommended to ensure proper clamping force and prevent over-tightening.