USD 0.00 ~ USD 0.00/carton
50/ carton (Min. Order)
Where protection meets aesthetics
Engineered for critical environments, our 304 Stainless Steel Cap Nuts combine superior corrosion resistance with a precision-polished dome that conceals threads while providing a finished appearance. Ideal for marine hardware, food processing equipment, and architectural installations where both durability and visual appeal are essential.
Industrial-Grade Protection
Crafted from certified 304 stainless steel (AISI 18/8), these cap nuts deliver exceptional performance in corrosive environments. The seamless dome design eliminates moisture traps, while the integrated washer face distributes clamping force evenly to prevent surface damage.
Key Technical Advantages
✔️ Marine-Grade Resistance: Withstands 1,000+ salt spray hours (ASTM B117)
✔️ Hygienic Design: Electropolished Ra≤0.8μm surface prevents bacterial growth (FDA/EC1935 compliant)
✔️ Temperature Resilience: -200°C to 400°C operational range (ASTM A193)
✔️ Vibration Proof: Prevailing torque design maintains clamp load under 15G vibration
✔️ Aesthetic Excellence: Mirror-polished (#8 finish) or satin finish options
Technical Specifications
| Parameter | Specification |
|---|---|
| Material | 304 Stainless Steel (AISI 18/8) |
| Grade | A2-70 (70ksi min tensile) |
| Standard | ISO 1580 • DIN 1587 • ASME B18.2.2 |
| Drive Type | Hexagonal (ISO 4014) |
| Finish | Electropolished • Passivated |
| Sizes | M3 to M24 • #6 to 1" |
| Height | 1.5D (Standard) • 2D (Deep) |
| Compliance | RoHS • REACH • NACE MR0175 |
Performance Comparison
| Feature | Standard Zinc Nut | 304 Cap Nut |
|---|---|---|
| Salt Resistance | 120hr failure | 1,000hr+ intact |
| Chemical Exposure | Acid corrosion | Resists acids/alkalis |
| Lifespan | 2-5 years coastal | 20+ years coastal |
| UV Degradation | Chalking/oxidation | Zero color change |
Critical Applications
Marine: Deck hardware • Railings • Outboard mounts
Food Processing: Mixing tanks • Conveyor systems • CIP equipment
Architectural: Glass facades • Elevator interiors • Sculpture assemblies
Industrial: Chemical reactors • Cryogenic valves • Pharmaceutical machinery
Installation Benefits
Reduced thread damage during disassembly
Finger-safe dome protects against snagging
Compatible with standard sockets (no specialty tools)
Optional nylon insert (Locking variant) for permanent installations
Laser Marking: Part numbers/barcodes on dome face
Special Threads: Left-hand • Fine pitch • UNJ profiles
Sealing Solutions:
Integrated EPDM washer (IP68 sealing)
PTFE encapsulated base
Special Finishes:
PVD gold/black coating
Bead-blasted matte texture
Industrial: Vacuum-sealed bulk boxes (Qty 1,000-5,000)
Retail: Color-coded blister packs (Qty 10-50)
Certifications: Mill test reports per EN 10204 3.1
Email format error
Email cannot be empty
Email already exists
6-20 characters(letters plus numbers only)
The password is inconsistent
Email format error
Email cannot be empty
Email does not exist
6-20 characters(letters plus numbers only)
The password is inconsistent
