304 Stainless Steel Parallel Key
304 stainless steel parallel key is a precision mechanical transmission component designed for reliable torque transfer, shaft positioning, and corrosion-resistant assembly applications. The 304 stainless steel parallel key is manufactured from high-quality 304 stainless steel, offering excellent corrosion resistance, stable dimensions, and reliable mechanical performance.
The 304 stainless steel parallel key features a standard rectangular key profile that fits accurately into shaft and hub keyways, preventing relative rotation between connected components. It is widely used in food processing equipment, marine systems, chemical machinery, pumps, motors, and industrial equipment where corrosion resistance and clean operation are required.

Product Overview
The 304 stainless steel parallel key is engineered for mechanical power transmission applications requiring reliable positioning and improved environmental resistance. Its rectangular structure provides stable torque transfer between shafts and mounted components such as gears, pulleys, couplings, and sprockets.
Compared with carbon steel keys, the 304 stainless steel parallel key offers superior resistance to moisture, oxidation, and many chemical environments. It is especially suitable for applications where equipment cleanliness and long-term corrosion protection are important.
As a dependable industrial mechanical component, it is widely selected by OEM manufacturers, machinery builders, and engineering companies for durable shaft connection solutions.
Product Specifications
| Item | Description |
|---|---|
| Product Name | 304 Stainless Steel Parallel Key |
| Material | 304 Stainless Steel |
| Key Type | Standard Parallel Key |
| Shape | Rectangular Key |
| End Type | Standard Square Ends |
| Width Range | 2mm–50mm |
| Height Range | 2mm–30mm |
| Length Range | Customized According to Requirement |
| Surface Finish | Natural Stainless Steel / Polished |
| Installation Type | Shaft and Hub Keyway Fit |
| Packaging | Bulk / Carton / OEM Packaging |
| Customization | Size, length, tolerance available |
Technical Parameters
| Parameter | Value |
|---|---|
| Tensile Strength | Approx. 515 MPa |
| Yield Strength | Approx. 205 MPa |
| Hardness | ≤ HRB 92 |
| Density | Approx. 7.93 g/cm³ |
| Corrosion Resistance | Excellent resistance in common environments |
| Wear Resistance | Good for standard transmission applications |
| Operating Temperature | Suitable for general industrial conditions |
| Material Standard | 304 Stainless Steel |
Materials and Manufacturing Process
The 304 stainless steel parallel key is manufactured through precision machining processes to ensure accurate dimensions, smooth surfaces, and reliable transmission performance.
- Raw material selection: High-quality 304 stainless steel bar stock
- Cutting: Precision cutting according to required length
- Milling machining: Formation of rectangular key geometry
- Grinding: Improves dimensional accuracy and surface finish
- Deburring: Removes sharp edges for safe installation
- Surface finishing: Natural stainless steel finish or polishing
- Inspection: Width, height, length, and tolerance testing
- Packaging: Protective industrial packaging for transportation
Each 304 stainless steel parallel key is produced under strict quality control to ensure consistent mechanical performance.
Applications of the Product
The 304 stainless steel parallel key is widely used across multiple industries:
- Food processing equipment: Hygienic corrosion-resistant transmission systems
- Chemical machinery: Components exposed to moisture and chemicals
- Marine equipment: Corrosion-resistant shaft connections
- Pumps and valves: Rotating component assemblies
- Electric motors: Shaft and rotor connections
- Automation equipment: Precision motion systems
- Pharmaceutical equipment: Clean manufacturing environments
- Industrial machinery: Gear, pulley, and coupling systems
Its corrosion resistance makes it suitable for environments where standard steel keys may require frequent replacement.
Why Choose This Product
- Excellent corrosion resistance of 304 stainless steel
- Reliable torque transmission performance
- Accurate shaft and hub positioning
- Stable dimensional accuracy
- Suitable for humid and clean environments
- Good mechanical strength for industrial use
- Smooth surface finish options available
- Long service life compared with carbon steel keys
- OEM customization support
The 304 stainless steel parallel key provides a reliable and corrosion-resistant solution for mechanical transmission systems.
Why Choose Flybear
Flybear is a professional manufacturer specializing in precision industrial fasteners and mechanical transmission components.
- Advanced CNC machining capability
- Stainless steel component manufacturing experience
- OEM/ODM customization support
- Stable production capacity for bulk orders
- Strict quality inspection procedures
- Global export experience
- Engineering support for customized applications
Flybear provides reliable mechanical components for machinery manufacturers, distributors, and industrial customers worldwide.
Quality Inspection and Control
Quality assurance is maintained throughout the manufacturing process:
- Stainless steel material composition analysis
- Raw material certificate verification
- Dimensional accuracy inspection
- Width, height, and length measurement
- Surface finish inspection
- Tolerance verification
- Batch consistency inspection
- Packaging quality control
All production processes follow ISO-based quality management systems to ensure consistent product reliability.
Selection Guide
When selecting a 304 stainless steel parallel key, consider:
- Shaft diameter and keyway dimensions
- Required torque transmission capacity
- Operating environment conditions
- Corrosion exposure level
- Assembly tolerance requirements
- Equipment maintenance requirements
Correct selection ensures efficient power transmission and long-term mechanical stability.
FAQ
1. What is a 304 stainless steel parallel key used for?
It is used to transmit torque and secure rotating components between shafts and hubs.
2. Why choose 304 stainless steel material?
304 stainless steel provides excellent corrosion resistance and stable mechanical properties.
3. Can stainless steel keys replace carbon steel keys?
Yes, especially in applications requiring better corrosion resistance.
4. Can custom sizes be produced?
Yes, Flybear supports customized dimensions, lengths, and tolerances.
5. Which industries use 304 stainless steel keys?
They are widely used in food equipment, pumps, motors, chemical machinery, and automation systems.
We always adhere to the philosophy of quality first and customer first, providing customers with high-quality fastener products and one-stop fastener solutions.
Contact us for quotation, customization, and technical support via Contact Us.




