Hex Slotted Castle Nut DIN935
Hex slotted castle nut DIN935 is a precision fastening component designed for applications requiring secure locking and easy mechanical retention. The hex slotted castle nut DIN935 features machined slots on the top section, allowing the use of a cotter pin or split pin through the bolt hole to prevent loosening during operation.
The hex slotted castle nut DIN935 is widely used in automotive systems, machinery, agricultural equipment, steering assemblies, shafts, and industrial mechanical connections where additional locking security is required.

Product Overview
The hex slotted castle nut DIN935 is a six-sided locking nut manufactured according to DIN935 standard requirements. The castellated design includes evenly spaced slots around the top of the nut, allowing installation with a matching bolt or stud that has a cross-drilled hole.
After tightening, a cotter pin can be inserted through the slot and bolt hole to create a positive mechanical locking system. Unlike friction-based locking nuts, the hex slotted castle nut DIN935 provides a visible and reliable locking method suitable for safety-critical assemblies.
This type of nut is commonly selected by engineers and manufacturers requiring secure fastening in applications exposed to vibration, rotation, or dynamic loads.
Product Specifications
| Item | Description |
|---|---|
| Product Name | Hex Slotted Castle Nut DIN935 |
| Standard | DIN935 |
| Material | Carbon Steel / Stainless Steel / Alloy Steel |
| Nut Type | Slotted Castle Nut |
| Locking Method | Cotter Pin Locking |
| Thread Standard | Metric Thread |
| Size Range | According to DIN935 Standard |
| Thread Direction | Right Hand |
| Surface Finish | Plain / Zinc Plated / Black Oxide / Customized |
| Application | Mechanical Locking Assemblies |
| Packaging | Bulk / Carton / OEM Packaging |
| Customization | Size, material, finish available |
Technical Parameters
| Parameter | Value |
|---|---|
| Material | Carbon Steel / Stainless Steel Options |
| Strength Grade | According to Material Requirement |
| Tensile Performance | According to Nut Grade |
| Hardness | Controlled According to Specification |
| Corrosion Resistance | Depends on Material and Finish |
| Locking Method | Cotter Pin Mechanical Lock |
| Thread Accuracy | Controlled According to DIN935 |
| Manufacturing Standard | DIN935 |
Materials and Manufacturing Process
The hex slotted castle nut DIN935 is manufactured through precision metal forming, threading, slot machining, and surface finishing processes.
- Raw material selection: Carbon steel, stainless steel, or alloy steel according to application requirements
- Material inspection: Chemical composition verification
- Nut forming: Cold forging or hot forging process for structural strength
- Thread processing: Precision internal thread tapping
- Slot machining: Accurate castellated slot cutting according to DIN935 requirements
- Heat treatment: Applied when required for mechanical performance
- Surface finishing: Zinc plating, black oxide, or customized coating
- Inspection: Thread gauge testing, slot dimension inspection, hardness testing, and surface inspection
- Packaging: Protective industrial packaging for transportation
Each hex slotted castle nut DIN935 is produced under strict quality control to ensure reliable locking performance.
Applications of the Product
The hex slotted castle nut DIN935 is widely used in applications requiring mechanical locking:
- Automotive industry: Steering systems, suspension parts, and wheel assemblies
- Machinery manufacturing: Rotating shafts and mechanical joints
- Agricultural equipment: Heavy-duty moving components
- Construction machinery: Equipment connection systems
- Industrial equipment: High-vibration assemblies
- Transportation systems: Mechanical safety fastening
- Manufacturing systems: Customized machinery components
- OEM products: Specialized mechanical assemblies
Its positive locking method makes it suitable for applications where preventing nut rotation is essential.
Why Choose This Product
- DIN935 standard compliance
- Reliable cotter pin locking design
- Suitable for vibration and dynamic loads
- Available in carbon steel and stainless steel materials
- Multiple surface treatment options
- Stable thread accuracy
- Easy inspection after installation
- OEM customization support
The hex slotted castle nut DIN935 provides a dependable fastening solution for safety-critical mechanical applications.
Why Choose Flybear
Flybear is a professional manufacturer specializing in industrial fasteners and customized fastening solutions.
- Experience with specialty nut manufacturing
- Support for DIN standard fastening products
- Advanced forging, threading, and machining capability
- Professional surface treatment management
- OEM/ODM customization support
- Stable production capacity for bulk supply
- Global export experience
- Engineering support for customized fastening requirements
Flybear provides reliable fastening products for automotive, machinery, industrial equipment, and OEM customers worldwide.
Quality Inspection and Control
Quality assurance is maintained throughout production:
- Raw material chemical composition analysis
- Material certificate verification
- Thread gauge inspection
- Slot dimension inspection
- Dimensional accuracy inspection
- Mechanical performance testing
- Surface finish inspection
- Packaging quality inspection
All manufacturing processes follow ISO-based quality management systems to ensure consistent product reliability.
Selection Guide
When selecting a hex slotted castle nut DIN935, consider:
- Matching bolt diameter and thread specification
- Required locking method
- Application vibration level
- Material compatibility
- Corrosion environment
- Required surface treatment
Correct selection ensures secure fastening and long-term mechanical reliability.
FAQ
1. What is a DIN935 castle nut used for?
A DIN935 castle nut is used for mechanical assemblies requiring additional locking through a cotter pin.
2. How does a slotted castle nut prevent loosening?
The nut is secured by inserting a cotter pin through the slot and the drilled hole in the bolt.
3. What materials are available for DIN935 nuts?
Common materials include carbon steel, stainless steel, and alloy steel.
4. Can DIN935 castle nuts be customized?
Yes, Flybear supports customized sizes, materials, finishes, and packaging.
5. Where are castle nuts commonly used?
They are widely used in automotive, machinery, agricultural equipment, and industrial applications.
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.




