Bulk & Factory Direct Supply
Secure Locking Fasteners for Critical Applications
Castle nuts, also known as castellated nuts, are designed with slots (or “castellations”) that allow insertion of a cotter pin to lock the nut in place. This prevents loosening due to vibration or dynamic loads, making them ideal for safety-critical and high-movement applications.
At Offshore Milling & Sourcing, we provide bulk castle nuts sourced directly from global manufacturers, ensuring durability, precision threading, and cost efficiency for high-volume needs.
Types Available
- Standard Castle Nuts
- Slotted Hex Nuts
- Metric Castle Nuts
- Fine Thread Castle Nuts
- Heavy Duty Castle Nuts
- Custom Per-Print Castle Nuts
Grades Available
- Grade 2
- Grade 5
- Grade 8
- ASTM A194
- ASTM A563
- Metric Class 8 / 10 / 12
- Custom Mechanical Requirements Available
Materials
- Low Carbon Steel
- Medium Carbon Steel
- Alloy Steel
- Stainless Steel 304
- Stainless Steel 316
- Specialty Alloys (upon request)
Finish & Coating Options
- Zinc Plated
- Yellow Zinc
- Black Oxide
- Plain Finish
- Hot Dip Galvanized
- Stainless (Natural Finish)
- Custom Corrosion-Resistant Coatings
Industries Served
- Automotive & Transportation
- Aerospace & Defense
- Agriculture Equipment
- Construction & Infrastructure
- Industrial Machinery
- Marine Applications
Applications
- Wheel hub and axle assemblies
- Suspension and steering systems
- Trailer and towing equipment
- Machinery requiring vibration resistance
- Aerospace and defense assemblies
- Marine and outdoor equipment
Why Offshore Milling & Sourcing?
- Direct factory sourcing for competitive pricing
- High-strength, safety-critical manufacturing standards
- Consistent quality across large production runs
- Custom engineering and per-print capabilities
- Reliable global logistics and delivery
Request a Quote
Looking for dependable castle nuts?
Contact Offshore Milling & Sourcing today for pricing, samples, and custom specifications.
