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Home > Hot Products > China M8-M16 External Hexagonal Bolts Suppliers - High-Quality Factory Manufacturing
China M8-M16 External Hexagonal Bolts Suppliers - High-Quality Factory Manufacturing
China M8-M16 External Hexagonal Bolts Suppliers - High-Quality Factory Manufacturing
China M8-M16 External Hexagonal Bolts Suppliers - High-Quality Factory Manufacturing
China M8-M16 External Hexagonal Bolts Suppliers - High-Quality Factory Manufacturing
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China M8-M16 External Hexagonal Bolts Suppliers - High-Quality Factory Manufacturing
China M8-M16 External Hexagonal Bolts Suppliers - High-Quality Factory Manufacturing
China M8-M16 External Hexagonal Bolts Suppliers - High-Quality Factory Manufacturing
China M8-M16 External Hexagonal Bolts Suppliers - High-Quality Factory Manufacturing

China M8-M16 External Hexagonal Bolts Suppliers - High-Quality Factory Manufacturing

When considering external hexagonal bolts, it's important to recognize their advantages as well as their limitations. These fasteners are not suitable for thin-walled components or for applications that involve impact, vibration, or fluctuating loads. Additionally, longer bolts may lack full threads, making them challenging to tighten with the appropriate tools. This can lead to difficulties in unscrewing or replacing them. For optimal results, it's recommended to use a professional wrench for disassembly, as standard methods may not provide sufficient ease. As a trusted China supplier and factory, we offer high-quality external hexagonal bolts that cater to your specific needs while ensuring reliable performance in suitable applications
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Product Description

External Hexagonal Bolt Technical Drawing
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
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
k Min (Max) 17.35 19.12 21.42 22.92 25.42 26.42 28.42 30.42
k 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

External hexagonal bolts are a common type of mechanical fastener, mainly used for connecting and fixing mechanical equipment.

Key Applications:
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, it can withstand large loads and shear forces, ensuring the firmness of the connection.

3
Easy Installation

Can be completed with a standard wrench, offering fast installation speeds to improve production efficiency.

4
Wide Application Range

Suitable for various situations, such as heavy machinery, construction, and bridge engineering.

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. 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 compared to socket head bolts.
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. Common sizes include M10, M12, M16, M20, M24, up to M48, each with specific pitch and dimensional requirements.
Q What materials are external hexagonal bolts commonly made from?
They are most commonly manufactured from carbon steel, alloy steel, and stainless steel. Carbon steel is used for general applications, while alloy steel is for heavy-duty use, and stainless steel is selected for its excellent corrosion resistance.
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 based on the total bolt length (L). Selecting the correct thread length ensures proper engagement with the nut or threaded hole.
Q In which industries are external hexagonal bolts most widely used?
They are widely used in heavy machinery manufacturing, construction and civil engineering, bridge and steel structures, automotive assembly, and industrial equipment maintenance.
Q How do I select the correct external hexagonal bolt for my application?
Consider the required thread diameter (d), pitch (P), total length (L), material grade, and the load requirements. Always refer to technical specification tables and standards like ISO 4014 or DIN 931.

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