Comprehensive Technical Overview of Brass Dome Nuts
We are one of the leading manufacturers and exporters of Brass Dome Nuts, Decorative Brass Nuts, and Electrical Brass Hardware from India. We have been supplying high-quality Brass Dome Nuts, Acorn Nuts, Cap Nuts, Decorative Fasteners, Electrical Brass Nuts, Custom Dome Nuts, and Special Application Brass Nuts to the world market for many decades. Our state-of-the-art manufacturing facility specializes in producing premium Brass Dome Nut Systems using advanced copper alloy formulation, precision hot forging, cold forming technology, CNC machining, heat treatment processes, surface finishing, automated assembly, quality testing, and comprehensive quality assurance systems. With over three decades of global experience in Brass Dome Nut manufacturing, we serve diverse industries including electrical equipment manufacturing, plumbing fixtures, furniture hardware, decorative applications, automotive components, marine hardware, and architectural fittings. Our expertise encompasses working with various brass alloys including Free Cutting Brass (C36000), Architectural Brass (C38500), Naval Brass (C46400), Leaded Brass (C35300), and DZR Brass (CW602N). We manufacture Brass Dome Nuts in sizes from M4 to M20, thread pitches including metric, UNC, UNF, and BSP, maintaining excellent corrosion resistance, good electrical conductivity, compliance with ISO 4033, DIN 1587, ANSI B18.2.2, ASTM B16 standards, and reliable performance in various applications.
Types of Brass Dome Nuts
Standard Brass Dome Nuts
General Purpose Dome Nuts with smooth spherical crown and hexagonal base, featuring precision-cut threads and polished finish. Available in sizes from M4 to M12 with various thread pitches. These Universal Dome Nuts provide secure fastening with finished appearance for electrical enclosures, control panels, instrumentation, and general hardware applications where both functionality and aesthetics are important.
Heavy-Duty Brass Dome Nuts
Reinforced Dome Nuts with increased wall thickness and enhanced mechanical strength, featuring robust construction and superior load distribution. Sizes from M8 to M20 with higher torque capabilities. These High-Strength Dome Nuts are essential for structural applications, heavy equipment, vibration-prone environments, and high-stress applications where maximum mechanical reliability is required.
Decorative Brass Dome Nuts
Premium Finish Dome Nuts with enhanced surface treatments, featuring mirror polishing, antique finishes, and special coatings. Available in various aesthetic finishes including polished brass, satin brass, and antique brass. These Architectural Grade Nuts are designed for visible applications, decorative hardware, furniture fittings, and architectural elements where appearance is paramount.
Electrical Brass Dome Nuts
Electrically Conductive Dome Nuts with optimized electrical properties, featuring smooth current transfer and secure grounding capability. These Electrical Grade Nuts provide reliable electrical connections for busbar systems, grounding applications, electrical enclosures, and power distribution equipment where electrical continuity is important.
Anti-Corrosion Brass Dome Nuts
Marine Grade Dome Nuts with enhanced corrosion resistance, featuring DZR brass or naval brass construction. These Corrosion Resistant Nuts are crucial for marine applications, coastal installations, chemical environments, and outdoor applications where superior corrosion resistance is required.
Material Specifications & Properties
Brass Alloy Composition & Mechanical Properties
| Alloy Type | Composition | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Rockwell Hardness |
|---|---|---|---|---|---|
| Free Cutting Brass C36000 | 61.5% Cu, 35.5% Zn, 3% Pb | 340-420 | 170-200 | 25-35 | B78-B85 |
| Architectural Brass C38500 | 57-60% Cu, 35.5-40.5% Zn, 2.5-3.5% Pb | 380-450 | 160-190 | 30-40 | B70-B80 |
| Naval Brass C46400 | 60% Cu, 39.25% Zn, 0.75% Sn | 380-480 | 170-210 | 25-35 | B75-B85 |
| DZR Brass CW602N | 58-60% Cu, 36-38% Zn, 1.6-2.5% Pb | 400-500 | 180-220 | 20-30 | B80-B90 |
Performance Specifications & Standards
| Parameter | Standard Grade | Heavy-Duty Grade | Marine Grade | Test Standard |
|---|---|---|---|---|
| Proof Load | 250-600 MPa | 400-800 MPa | 350-700 MPa | ISO 898-2 |
| Torque Strength | 5-80 Nm | 15-200 Nm | 10-150 Nm | DIN 267 |
| Corrosion Resistance | 500 hours | 750 hours | 1000+ hours | ASTM B117 |
| Temperature Range | -40°C to 120°C | -40°C to 150°C | -40°C to 200°C | ISO 9146 |
Manufacturing Excellence
Advanced Manufacturing Process
Hot Forging Technology: Precision hot forging for superior grain structure and mechanical properties
Cold Forming Process: Multi-stage cold forming for dimensional accuracy and surface finish
CNC Machining: Precision threading and finishing operations
Heat Treatment: Stress relief annealing for optimal mechanical properties
Surface Treatment: Electroplating, polishing, and special coatings
Quality Testing: 100% dimensional, visual, and thread inspection
Quality Assurance Protocols
Raw Material Testing: Spectrochemical analysis for alloy composition verification
Dimensional Control: Optical comparator inspection with statistical process control
Mechanical Testing: Torque testing, tensile testing, and hardness testing
Thread Verification: Go/No-Go gauge testing for thread accuracy
Performance Validation: Salt spray testing, torque-tension testing, and accelerated aging
Technical Specifications & Performance Data
Dimensional Specifications & Torque Values
| Nut Size | Thread Pitch | Across Flats | Overall Height | Proof Load | Recommended Torque | Weight (g) |
|---|---|---|---|---|---|---|
| M4 | 0.7mm | 7mm | 4mm | 2500 N | 1.5-2.0 Nm | 0.8 |
| M5 | 0.8mm | 8mm | 5mm | 4000 N | 3.0-4.0 Nm | 1.5 |
| M6 | 1.0mm | 10mm | 6mm | 6000 N | 5.0-7.0 Nm | 2.8 |
| M8 | 1.25mm | 13mm | 8mm | 10000 N | 12-16 Nm | 6.5 |
| M10 | 1.5mm | 17mm | 10mm | 16000 N | 24-30 Nm | 12.5 |
| M12 | 1.75mm | 19mm | 12mm | 23000 N | 40-50 Nm | 20.5 |
| M16 | 2.0mm | 24mm | 16mm | 42000 N | 90-110 Nm | 48.0 |
| M20 | 2.5mm | 30mm | 20mm | 65000 N | 150-180 Nm | 92.0 |
Thread Specifications & Compatibility
| Thread Type | Standard | Thread Angle | Pitch | Tolerance Class | Applications |
|---|---|---|---|---|---|
| Metric Coarse | ISO 261 | 60° | Standard | 6H | General Purpose |
| Metric Fine | ISO 965 | 60° | Fine | 6H | Precision Instruments |
| UNC | ANSI B1.1 | 60° | Coarse | 2B | North American |
| UNF | ANSI B1.1 | 60° | Fine | 2B | Precision Mechanical |
| BSP | ISO 228 | 55° | Whitworth | B | Plumbing/Piping |
Surface Finishes & Coatings
Available Finishes & Specifications
| Finish Type | Thickness | Salt Spray Resistance | Appearance | Applications |
|---|---|---|---|---|
| Natural Brass | N/A | 96 hours | Golden Yellow | Indoor, Decorative |
| Polished Brass | N/A | 96 hours | Mirror Finish | Premium Applications |
| Nickel Plated | 5-10μm | 200 hours | Silver White | Industrial, Marine |
| Chrome Plated | 10-15μm | 300 hours | Bright Silver | Automotive, Marine |
| Tin Plated | 3-8μm | 150 hours | Dull Silver | Electrical, Food Grade |
| Antique Brass | N/A | 120 hours | Dark Brown | Architectural, Decorative |
International Standards & Certifications
Global Compliance & Approvals
ISO 4033: Hexagon dome nuts – Product grades A and B
DIN 1587: Dome nuts with metric fine pitch thread
ANSI B18.2.2: American standard for nuts
ASTM B16: Standard specification for free-cutting brass rod, bar, and shapes
RoHS Compliance: Restriction of hazardous substances
Testing & Certification Standards
Mechanical Testing: Torque testing per ISO 898-2
Corrosion Testing: Salt spray testing per ASTM B117
Dimensional Inspection: Thread gauging per ISO 1502
Material Certification: Mill certificates with full traceability
Industry Applications
Electrical & Electronics
Control Panels: Secure fastening with finished appearance
Electrical Enclosures: Grounding and bonding applications
Busbar Systems: Electrical connections and supports
Instrumentation: Precision fastening in sensitive equipment
Plumbing & Sanitary
Water Fittings: Corrosion-resistant connections in plumbing systems
Valve Assemblies: Secure fastening with aesthetic finish
Sanitary Ware: Decorative fastening in bathroom fixtures
Pipe Fittings: Connections in water distribution systems
Architectural & Decorative
Furniture Hardware: Decorative fastening in premium furniture
Architectural Fittings: Visible fasteners in building elements
Lighting Fixtures: Secure and attractive fastening solutions
Display Systems: Aesthetic fastening in retail displays
Installation Guidelines & Maintenance
Professional Installation Procedure
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Thread Preparation: Clean mating threads and verify compatibility
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Nut Selection: Choose appropriate size and grade for application
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Hand Tightening: Start threads carefully to prevent cross-threading
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Torque Application: Use calibrated torque wrench with specified values
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Final Inspection: Verify proper seating and engagement
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Surface Protection: Apply appropriate anti-seize if required
Maintenance Best Practices
Regular Inspection: Visual inspection for corrosion or damage
Torque Verification: Periodic torque check in critical applications
Corrosion Monitoring: Regular assessment in harsh environments
Cleaning Procedures: Appropriate cleaning methods for different finishes
Replacement Schedule: 20+ year service life with proper installation
Frequently Asked Questions
Q1: What are the advantages of brass dome nuts over standard nuts?
Brass dome nuts offer superior corrosion resistance, excellent aesthetic appearance, good electrical conductivity, non-magnetic properties, and natural antimicrobial characteristics. The dome shape provides a finished look while protecting threads and preventing snagging.
Q2: Can these dome nuts be used in outdoor applications?
Yes, our brass dome nuts are suitable for outdoor applications, especially when made from DZR brass or naval brass alloys. For severe marine environments, we recommend our marine-grade dome nuts with enhanced corrosion protection.
Q3: What is the maximum temperature rating for your brass dome nuts?
Standard brass dome nuts are rated for continuous service from -40°C to 120°C. Special high-temperature versions are available for applications up to 200°C, depending on the specific alloy and application requirements.
Q4: Do you provide custom sizes and special finishes?
Yes, we specialize in custom dome nut manufacturing including non-standard sizes, special thread types, unique finishes, and custom markings. Minimum order quantities apply for custom specifications.
Q5: What is the expected service life of your brass dome nuts?
Our brass dome nuts have a service life expectancy of 20+ years in standard applications and 15+ years in harsh environments when properly installed and maintained, depending on the specific alloy and environmental conditions.
Q6: What testing do you perform on finished dome nuts?
We perform 100% dimensional inspection, thread gauge verification, visual examination, and sample mechanical testing. Additionally, we conduct corrosion testing, torque-tension testing, and material verification for quality assurance.
Contact Us Today – Request Quote for Brass Dome Nuts
Ready to discuss your Brass Dome Nut requirements for electrical applications, plumbing systems, decorative hardware, or custom fastening solutions?
Request a Quote: Send your specifications including nut size, thread type, material grade, finish, quantity, and application details to sales@jambrass.com for a detailed quotation within 24 hours.
Technical Support: Email your application requirements or technical drawings for nut selection guidance, material recommendation, and finishing assistance.
Call Us: +91-22-43449300 / +91-22-43449323 (Monday-Friday, 9:00 AM – 6:00 PM IST)
Office Address: 1406, 14th Floor, Dalamal Tower, Nariman Point, Mumbai – 400021, Maharashtra, INDIA
Factory Address: Plot 10B, GIDC Industrial Estate, Shanker Tekari, Udyognagar, Jamnagar, Gujarat, India – 361004
Contact Person: Mr. Mehul Vora
Email: sales@jambrass.com
