- Description
Stainless Steel Hexagon Bar: Common Specifications and Size Standards
Stainless steel hexagon bar (also called hex bar or hexagonal stainless steel rod) is widely used in machining, fastener production, mechanical components, and engineering structures. Its six-sided geometry provides excellent grip for machining operations and is ideal for bolts, nuts, and precision parts manufacturing.
The most important factor when selecting stainless steel hex bars is understanding the standard size range, across flats (AF) dimensions, and length tolerances used in industrial supply.
Common Size Range of Stainless Steel Hexagon Bar
Stainless steel hex bars are typically defined by the distance across flats (AF), which determines the bar’s size and application suitability.
| Size Category | Across Flats (AF) | Equivalent Use |
|---|---|---|
| Small Hex Bar | 3mm – 10mm | Precision screws, small fasteners |
| Medium Hex Bar | 10mm – 30mm | General machining parts, bolts |
| Large Hex Bar | 30mm – 80mm | Heavy-duty mechanical components |
| Extra Large Hex Bar | 80mm – 120mm+ | Industrial structural parts |
Standard Length Specifications
Hexagon bars are commonly supplied in standard lengths suitable for machining and industrial fabrication.
- Standard length: 3 meters
- Standard length: 4 meters
- Standard length: 6 meters
- Custom cutting available according to requirements
Dimensional Tolerance and Precision Grades
Different manufacturing processes provide different levels of precision depending on application requirements.
| Processing Type | Tolerance Grade | Surface Quality |
|---|---|---|
| Hot Rolled Hex Bar | Standard tolerance (±0.5mm to ±1mm) | Rough surface |
| Cold Drawn Hex Bar | High precision (h9 / h11) | Smooth surface |
| Bright Hex Bar | Very high precision | Polished finish |
Common Stainless Steel Grades for Hex Bars
Hexagon bars are available in different stainless steel grades depending on corrosion resistance and mechanical requirements.
- 304 / 304L – General-purpose corrosion resistance and machining
- 316 / 316L – Marine and chemical environments
- 303 – Improved machinability for fastener production
- 410 / 420 – High hardness and wear resistance
- 17-4PH – High-strength precision engineering applications
Surface Finish Options
- Hot rolled black surface – structural and heavy-duty use
- Pickled surface – improved corrosion resistance
- Bright drawn finish – precision machining applications
- Polished surface – decorative or sanitary use
Industrial Applications of Stainless Steel Hexagon Bar
- Bolts, nuts, and fastening systems
- Automotive mechanical components
- Machined precision parts and shafts
- Construction hardware and connectors
- Industrial machinery parts
- Hydraulic and valve components
In global supply chains, companies like Teda Ganghua provide stainless steel hex bars with stable dimensional accuracy and export-grade packaging for industrial manufacturing needs.
Comparison with Other Bar Shapes
| Shape | Main Advantage | Typical Use |
|---|---|---|
| Round Bar | Easy turning and machining | Shafts, structural parts |
| Square Bar | Structural stability | Frameworks, supports |
| Hex Bar | Better grip for machining and fastening | Bolts, nuts, precision parts |
FAQ
1. What is the standard size range of stainless steel hex bars?
They typically range from 3mm to 120mm across flats depending on application requirements.
2. What is the standard length of hex stainless steel bars?
Common lengths are 3m, 4m, and 6m, with custom cutting available.
3. What is “across flats” (AF) in hex bars?
It refers to the distance between two opposite flat sides of the hexagon shape.
4. Which grade is best for machining hex bars?
304 and 303 stainless steels are commonly used, with 303 offering better machinability.
5. Does Teda Ganghua supply stainless steel hex bars?
Yes, Teda Ganghua provides stainless steel hexagon bars in multiple grades and sizes with export packaging.
