Full spectrum of industrial fastening solutions | Covering both standard and custom parts
Our 304 Stainless Steel Hollow Hex Head Bolts are specially designed fasteners with a central hole through the bolt body. Compared with standard solid hex bolts, these hollow bolts provide additional functionality for applications that require ventilation, drainage, cable routing, weight reduction, or special assembly requirements.
Made from high-quality 304 stainless steel, these bolts offer good corrosion resistance, clean appearance, and reliable durability. The external hex head allows easy installation with standard spanners, wrenches, or socket tools.
These hollow hex bolts are available in common metric sizes from M3 to M12, making them suitable for machinery, equipment assembly, custom fastening projects, industrial maintenance, and special-purpose applications.
| Item | Description |
|---|---|
| Product Name | Hollow Hex Head Bolt |
| Material | Stainless Steel 304 |
| Head Type | Hex Head |
| Thread Type | Metric Thread |
| Structure | Hollow Center Hole |
| Available Sizes | M3, M4, M5, M6, M8, M10, M12 |
| Surface Finish | Plain Stainless Steel |
| Unit | mm |
| Application | Machinery, equipment, custom assembly, ventilation, drainage, special fastening |
| Size | Pitch | Head Thickness | Head Width | Hole Diameter |
|---|---|---|---|---|
| M3 | 0.5 | 1.9–2.2 | 5.25–5.5 | 0.8–1.2 |
| M4 | 0.7 | 2.8–3.0 | 6.65–7 | 1.5–1.8 |
| M5 | 0.8 | 3.26–3.74 | 7.65–8 | 1.8 |
| M6 | 1.0 | 3.76–4.24 | 9.65–10 | 2.0 |
| M8 | 1.25 | 5.06–5.54 | 12.57–13 | 2–2.5 |
| M10 | 1.5 | 6.11–6.69 | 16.57–17 | 3.0 |
| M12 | 1.75 | 7.21–7.79 | 18.48–19 | 3.0 |
Hollow hex bolts are hex head bolts with a hole through the center of the bolt body. This design allows air, gas, liquid, wire, or other small components to pass through the bolt, depending on the application.
They are commonly used when the bolt must provide fastening while also allowing functional passage through the center.
| Application Area | Use |
|---|---|
| Machinery Assembly | Special fastening and positioning |
| Equipment Maintenance | Replacement for customized hollow bolts |
| Ventilation Systems | Allows air or gas passage |
| Drainage Applications | Allows liquid discharge in certain assemblies |
| Electrical Assembly | Cable or wire routing in special designs |
| Industrial Equipment | Custom fastening in production equipment |
| DIY & Custom Projects | Special structure connection and modification |
304 stainless steel is one of the most widely used stainless steel materials. It offers a good balance of corrosion resistance, strength, and cost performance.
| Material | Feature | Recommended Use |
|---|---|---|
| 304 Stainless Steel | Good corrosion resistance and clean appearance | Indoor, outdoor, machinery, general industrial use |
| 316 Stainless Steel | Higher corrosion resistance | Marine, coastal, chemical, high-humidity environments |
For most standard machinery and general-purpose applications, 304 stainless steel hollow hex bolts are a practical and reliable choice.
These 304 Stainless Steel Hollow Hex Head Bolts combine fastening strength with functional hollow-hole design. The hex head provides stable torque transmission during installation, while the stainless steel body helps resist rust and corrosion.
They are suitable for customers who need special fasteners for machinery, equipment repair, custom production, or non-standard assembly solutions.
Please confirm the following details before ordering:
| Required Information | Example |
|---|---|
| Size | M3, M4, M5, M6, M8, M10, M12 |
| Thread Pitch | Standard metric pitch or customized pitch |
| Length | According to your project requirement |
| Hole Diameter | Please confirm if special hole size is required |
| Material | 304 stainless steel or other material |
| Quantity | Small quantity or bulk order |
The hollow design is not the same as a standard solid bolt. Please make sure the hole diameter and bolt length match your application.
A hollow hex bolt is a hex head bolt with a hole through the center. It can be used for fastening while allowing ventilation, drainage, cable routing, or special assembly functions.
These bolts are made from 304 stainless steel, which provides good corrosion resistance and durability.
Available sizes include M3, M4, M5, M6, M8, M10, and M12.
These are metric hollow hex bolts.
Yes. The hole diameter can be customized according to your drawing, sample, or project requirement.
Yes. 304 stainless steel is suitable for many indoor and outdoor environments. For marine or highly corrosive environments, 316 stainless steel may be recommended.
They can be supplied as fully threaded or partially threaded depending on the size, length, and customer requirements.
They can be installed with a standard wrench, spanner, or socket tool matching the hex head size.
Yes. Custom production is available based on samples, drawings, or detailed specifications.
304 Stainless Steel Hollow Hex Head Bolts are metric hex fasteners with a central hole design. Available in sizes M3 to M12, these bolts are suitable for machinery, equipment assembly, ventilation, drainage, cable routing, repair, and custom industrial applications. Made from durable 304 stainless steel, they provide good corrosion resistance, clean appearance, and reliable fastening performance.
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Complies with major global standards such as ISO/DIN/GB/ANSI/JIS
Standard parts + customized parts, one-stop solution for all your fastening needs
Tolerance control far exceeds industry standards, ranging from 4.8 to 12.9 grades.
Customization based on provided drawings/samples/working conditions; rapid prototyping and mass production delivery.
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International Organization for Standardization (ISO) standards
German Industrial Standards
Chinese National Standards
American National Standards
Japanese Industrial Standards
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