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China M8-M16 External Hexagonal Bolts Suppliers - High-Quality Factory Manufacturing
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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 | - | - | - | - | - | - | - | - | |
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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. Unlike socket head or carriage bolts, the hex head provides a larger bearing surface and can be driven from the outside, making it easier to install and remove in most applications.
Q
What thread sizes are available for external hexagonal bolts?
External hexagonal bolts are available in a wide range of metric thread sizes, typically 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 corresponding pitch and dimensional specifications.
Q
What materials are external hexagonal bolts commonly made from?
External hexagonal bolts are most commonly manufactured from carbon steel, alloy steel, and stainless steel. Carbon steel bolts are widely used for general applications, while alloy steel bolts offer higher strength for heavy-duty use. Stainless steel versions provide excellent corrosion resistance for outdoor or chemical environments.
Q
What does the "b" (thread length) value mean in the specification table?
The "b" value refers to the threaded length of the bolt shank. It varies depending on the total bolt length (L): bolts with L≤125mm, 125mm<L≤200mm, and L>200mm each have different thread lengths. Selecting the correct thread length is important to ensure proper engagement with the nut or threaded hole.
Q
In which industries are external hexagonal bolts most widely used?
External hexagonal bolts are used across a broad range of industries, including heavy machinery manufacturing, construction and civil engineering, bridge and steel structure projects, automotive assembly, and industrial equipment maintenance. Their versatility and reliability make them one of the most commonly used fasteners worldwide.
Q
How do I select the correct external hexagonal bolt for my application?
Selecting the right hex bolt involves considering the required thread diameter (d), pitch (P), bolt length (L), thread engagement length (b), material grade, and the load or shear force the connection must withstand. Always refer to the specification table for accurate dimensional data and consult engineering standards such as ISO 4014 or DIN 931 for guidance.