Comprehensive Technical Overview of Brass Flange Nuts
We are one of the leading manufacturers and exporters of Brass Flange Nuts, Brass Lock Nuts, and Electrical Brass Fasteners from India. We have been supplying high-quality Brass Flange Nuts, Self-Locking Flange Nuts, Serrated Flange Nuts, Nylon Insert Flange Nuts, Electrical Insulating Nuts, Custom Flange 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 Flange 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 Flange Nut manufacturing, we serve diverse industries including electrical equipment manufacturing, plumbing systems, automotive components, marine hardware, industrial machinery, pump and valve manufacturing, and general engineering applications. 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 Flange Nuts in sizes from M4 to M24, thread pitches including metric, UNC, UNF, and BSP, maintaining excellent corrosion resistance, good electrical conductivity, compliance with ISO 4161, DIN 6923, ANSI B18.2.2, ASTM B16 standards, and reliable performance in various applications.
Types of Brass Flange Nuts
Standard Brass Flange Nuts
General Purpose Flange Nuts with integrated washer flange, featuring precision-cut threads and smooth bearing surface. Available in sizes from M4 to M16 with various thread pitches. These Universal Flange Nuts provide secure fastening with built-in washer for electrical enclosures, control panels, plumbing fittings, and general hardware applications where vibration resistance and even load distribution are important.
Serrated Brass Flange Nuts
Anti-Rotation Flange Nuts with serrated flange base, featuring sharp teeth that bite into mating surface to prevent loosening. Sizes from M5 to M20 with various serration patterns. These Self-Locking Flange Nuts are essential for vibration-prone applications, moving equipment, automotive assemblies, and high-stress environments where secure locking is critical.
Nylon Insert Brass Flange Nuts
Self-Locking Flange Nuts with nylon collar insert, featuring vibration resistance and reusable locking capability. Available in sizes from M4 to M12 with blue or natural nylon inserts. These Vibration-Resistant Nuts are designed for critical assemblies, precision equipment, electronic enclosures, and applications requiring repeated disassembly.
Heavy-Duty Brass Flange Nuts
Reinforced Flange Nuts with increased flange diameter and thickness, featuring enhanced load distribution and higher torque capabilities. Sizes from M8 to M24 with robust construction. These High-Strength Flange Nuts are crucial for structural applications, heavy machinery, high-pressure systems, and load-bearing assemblies where maximum mechanical reliability is required.
Electrical Insulating Brass Flange Nuts
Dielectric Flange Nuts with insulating properties, featuring nylon coating or special composite materials. These Insulating Fasteners provide electrical isolation for electrical equipment, busbar supports, grounding systems, and applications requiring electrical insulation while maintaining corrosion resistance.
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 | 5-150 Nm | 20-300 Nm | 15-250 Nm | DIN 267 |
| Flange Pressure | 50-200 N/mm² | 100-300 N/mm² | 80-250 N/mm² | ISO 4161 |
| Corrosion Resistance | 500 hours | 750 hours | 1000+ hours | ASTM B117 |
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 flange machining 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
Flange Quality: Surface finish and flatness verification
Performance Validation: Salt spray testing, torque-tension testing, and vibration testing
Technical Specifications & Performance Data
Dimensional Specifications & Torque Values
| Nut Size | Thread Pitch | Flange Diameter | Flange Thickness | Overall Height | Proof Load | Recommended Torque |
|---|---|---|---|---|---|---|
| M4 | 0.7mm | 10mm | 1.5mm | 5mm | 2500 N | 1.5-2.0 Nm |
| M5 | 0.8mm | 12mm | 2.0mm | 6mm | 4000 N | 3.0-4.0 Nm |
| M6 | 1.0mm | 15mm | 2.5mm | 7mm | 6000 N | 5.0-7.0 Nm |
| M8 | 1.25mm | 20mm | 3.0mm | 9mm | 10000 N | 12-16 Nm |
| M10 | 1.5mm | 24mm | 3.5mm | 11mm | 16000 N | 24-30 Nm |
| M12 | 1.75mm | 28mm | 4.0mm | 13mm | 23000 N | 40-50 Nm |
| M16 | 2.0mm | 35mm | 5.0mm | 16mm | 42000 N | 90-110 Nm |
| M20 | 2.5mm | 42mm | 6.0mm | 20mm | 65000 N | 150-180 Nm |
Flange Specifications & Load Distribution
| Flange Type | Contact Area | Pressure Distribution | Bearing Stress | Applications |
|---|---|---|---|---|
| Standard Flange | Medium | Uniform | 50-150 N/mm² | General Purpose |
| Wide Flange | Large | Excellent | 30-100 N/mm² | Soft Materials |
| Serrated Flange | Medium | Concentrated | 80-200 N/mm² | Vibration Applications |
| Heavy Flange | Large | Superior | 40-120 N/mm² | Structural Applications |
Surface Finishes & Coatings
Available Finishes & Specifications
| Finish Type | Thickness | Salt Spray Resistance | Appearance | Applications |
|---|---|---|---|---|
| Natural Brass | N/A | 96 hours | Golden Yellow | Indoor, General |
| Polished Brass | N/A | 96 hours | Mirror Finish | Decorative, Marine |
| Nickel Plated | 5-15μm | 200-300 hours | Silver White | Industrial, Automotive |
| Chrome Plated | 10-20μm | 300-500 hours | Bright Silver | Marine, Automotive |
| Tin Plated | 3-10μm | 150-200 hours | Dull Silver | Electrical, Food Grade |
| Passivated | 0.5-2μm | 150 hours | Dark Yellow | Corrosion Protection |
International Standards & Certifications
Global Compliance & Approvals
ISO 4161: Hexagon flange nuts – Product grades A and B
DIN 6923: Hexagon flange nuts with metric coarse 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
REACH Compliance: European chemicals regulation
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
Vibration Testing: Junker vibration test per DIN 65151
Material Certification: Mill certificates with full traceability
Industry Applications
Electrical & Electronics
Control Panels: Secure fastening with integrated washer function
Electrical Enclosures: Grounding and bonding applications
Busbar Systems: Electrical connections with even pressure distribution
Circuit Breakers: Vibration-resistant fastening in electrical equipment
Plumbing & HVAC
Pipe Fittings: Corrosion-resistant connections in plumbing systems
Valve Assemblies: Secure fastening with built-in sealing surface
Pump Connections: Vibration-resistant fastening in pumping systems
HVAC Equipment: Reliable fastening in heating and cooling systems
Automotive & Transportation
Engine Components: Vibration-resistant fastening in automotive assemblies
Electrical Systems: Corrosion-resistant fastening in vehicle electronics
Body Panels: Secure fastening with finished appearance
Marine Equipment: Corrosion-resistant fastening in marine applications
Installation Guidelines & Maintenance
Professional Installation Procedure
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Surface Preparation: Clean mating surface and verify flange compatibility
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Nut Selection: Choose appropriate size and type for application requirements
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Thread Engagement: Start threads carefully to prevent cross-threading
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Torque Application: Use calibrated torque wrench with specified values
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Flange Contact: Ensure full flange contact with mating surface
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Final Inspection: Verify proper seating and flange engagement
Maintenance Best Practices
Regular Inspection: Visual inspection for corrosion, damage, or loosening
Torque Verification: Periodic torque check in critical applications
Corrosion Monitoring: Regular assessment in harsh environments
Surface Cleaning: 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 flange nuts over standard nuts with separate washers?
Brass flange nuts offer integrated washer functionality, better load distribution, reduced assembly time, elimination of loose washers, improved vibration resistance, and more consistent clamping force compared to standard nuts with separate washers.
Q2: Can serrated flange nuts be reused?
Serrated flange nuts can typically be reused 3-5 times depending on the application and mating surface material. For critical applications, we recommend inspection after each disassembly and replacement if serrations show significant wear.
Q3: What is the temperature rating for nylon insert brass flange nuts?
Our nylon insert brass flange nuts are rated for continuous service from -40°C to 120°C. The nylon insert maintains its locking properties within this temperature range, making them suitable for most industrial applications.
Q4: Do you provide flange nuts with custom flange dimensions?
Yes, we specialize in custom flange nut manufacturing including non-standard flange diameters, special thicknesses, unique serration patterns, and custom markings. Minimum order quantities apply for custom specifications.
Q5: What is the expected service life of your brass flange nuts?
Our brass flange 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 flange nuts?
We perform 100% dimensional inspection, thread gauge verification, visual examination, flange flatness check, and sample mechanical testing. Additionally, we conduct corrosion testing, vibration testing, torque-tension testing, and material verification for quality assurance.
Contact Us Today – Request Quote for Brass Flange Nuts
Ready to discuss your Brass Flange Nut requirements for electrical applications, plumbing systems, automotive components, or custom fastening solutions?
Request a Quote: Send your specifications including nut size, thread type, flange 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
