Comprehensive Technical Overview of Brass Conduit Bushes
We are one of the leading manufacturers and exporters of Brass Conduit Bushes, Electrical Conduit Fittings, and Cable Gland Accessories from India. We have been supplying high-quality Brass Conduit Bushes, Threaded Conduit Bushes, Locknut Bushes, Reducer Bushes, Electrical Insulating Bushes, Custom Conduit Bushes, and Special Application Brass Bushes to the world market for many decades. Our state-of-the-art manufacturing facility specializes in producing premium Brass Conduit Bush Systems using advanced copper alloy formulation, precision sand casting, hot forging technology, CNC machining, heat treatment processes, thread rolling, surface finishing, automated assembly, electrical testing, and comprehensive quality assurance systems. With over three decades of global experience in Brass Conduit Bush manufacturing, we serve diverse industries including electrical power distribution, industrial automation, building services, marine electrical systems, hazardous area installations, and telecommunications infrastructure. 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 Conduit Bushes in sizes from PG7 to PG48, metric threads from M12 to M63, and NPT threads from 1/2″ to 2″, maintaining excellent corrosion resistance, good electrical conductivity, compliance with IEC 62444, BS 4568, ANSI C80.3, ASTM B16 standards, and reliable performance in various electrical conduit applications.
Types of Brass Conduit Bushes
Standard Threaded Brass Conduit Bushes
General Purpose Conduit Bushes with parallel threads for standard electrical installations, featuring precise threading and smooth entry radius. Available in sizes from PG7 to PG36 with various thread types. These Universal Conduit Bushes provide secure connections for electrical enclosures, control panels, junction boxes, and general electrical installations where reliable conduit termination is required.
Reducer Type Brass Conduit Bushes
Step-Down Conduit Bushes with different thread sizes at each end, featuring smooth transition and secure locking. Available in common size combinations including PG16 to PG11, PG21 to PG16, and metric M32 to M25. These Size Adaptation Bushes are essential for conduit size transitions, retrofit applications, system modifications, and equipment compatibility where different conduit sizes must be connected.
Insulated Throat Brass Conduit Bushes
Non-Metallic Throat Bushes with integrated insulating sleeve, featuring dielectric protection and cable safety. These Insulated Entry Bushes provide electrical isolation for sensitive equipment, grounding applications, hazardous areas, and situations requiring additional cable protection against abrasion and short circuits.
Waterproof Brass Conduit Bushes
Sealed Conduit Bushes with integrated rubber grommets or O-rings, featuring weatherproof design and environmental protection. These Weatherproof Bushes are crucial for outdoor installations, marine applications, wet locations, and harsh environments where moisture and dust protection is critical.
Earthing Type Brass Conduit Bushes
Grounding Conduit Bushes with integrated earth terminals, featuring reliable grounding continuity and safety compliance. These Safety Bushes are designed for equipment grounding, safety earthing, lightning protection systems, and applications requiring guaranteed earth continuity.
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 |
|---|---|---|---|---|
| Thread Engagement | 5-8 full threads | 8-12 full threads | 6-10 full threads | ISO 228 |
| Torque Strength | 10-80 Nm | 20-150 Nm | 15-120 Nm | IEC 62444 |
| IP Rating | IP44 | IP66 | IP68 | IEC 60529 |
| Corrosion Resistance | 500 hours | 750 hours | 1000+ hours | ASTM B117 |
Manufacturing Excellence
Advanced Manufacturing Process
Sand Casting Technology: Precision sand casting for complex internal geometries
Hot Forging Process: 600-ton forging presses for high-strength components
CNC Machining: Precision threading and internal bore finishing
Thread Rolling: Cold-forming process for superior thread strength
Heat Treatment: Stress relief annealing for optimal mechanical properties
Surface Treatment: Electroplating, passivation, 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: CMM inspection with statistical process control
Thread Verification: Go/No-Go gauge testing for thread accuracy
Mechanical Testing: Torque testing, tensile testing, and pressure testing
Electrical Testing: Continuity testing and insulation resistance testing
Performance Validation: Salt spray testing, thermal cycling, and IP testing
Technical Specifications & Performance Data
Conduit Bush Specifications & Dimensions
| Bush Size | Thread Type | Major Diameter | Thread Pitch | Bush Length | Locknut Size | Weight (g) |
|---|---|---|---|---|---|---|
| PG7 | PG Thread | 12.5mm | 1.5mm | 15mm | 17mm | 8 |
| PG9 | PG Thread | 15.2mm | 1.5mm | 16mm | 19mm | 12 |
| PG11 | PG Thread | 18.6mm | 1.5mm | 18mm | 22mm | 18 |
| PG13.5 | PG Thread | 20.4mm | 1.5mm | 19mm | 24mm | 22 |
| PG16 | PG Thread | 22.5mm | 1.5mm | 20mm | 27mm | 28 |
| PG21 | PG Thread | 28.3mm | 1.5mm | 22mm | 34mm | 45 |
| PG29 | PG Thread | 37.0mm | 1.5mm | 25mm | 42mm | 85 |
| PG36 | PG Thread | 47.0mm | 1.5mm | 28mm | 50mm | 140 |
Electrical & Environmental Performance
| Performance Parameter | Standard Value | Enhanced Value | Test Condition |
|---|---|---|---|
| Electrical Continuity | <0.1Ω | <0.05Ω | At 10A DC |
| Insulation Resistance | >100MΩ | >1000MΩ | 500V DC |
| IP Protection Rating | IP44 | IP68 | IEC 60529 |
| Temperature Range | -25°C to 105°C | -40°C to 120°C | Continuous Operation |
| Vibration Resistance | 5-50Hz, 1.5mm | 5-500Hz, 2.0mm | IEC 60068-2-6 |
Thread Standards & Compatibility
International Thread Specifications
| Thread Standard | Thread Angle | Pitch | Applications | Regions |
|---|---|---|---|---|
| PG Thread | 80° | 1.5mm | General Electrical | Europe, Asia |
| Metric Thread | 60° | 1.0-2.0mm | Industrial Equipment | Worldwide |
| NPT Thread | 60° | Tapered | Plumbing, Hazardous | North America |
| G Thread | 55° | 1.0-2.0mm | Instrumentation | Worldwide |
Surface Finishes & Coatings
Available Finishes & Specifications
| Finish Type | Thickness | Salt Spray Resistance | Applications | Standards |
|---|---|---|---|---|
| Natural Brass | N/A | 96 hours | Indoor, General | – |
| Nickel Plated | 5-15μm | 200-300 hours | Industrial, Marine | ISO 1456 |
| Chrome Plated | 10-20μm | 300-500 hours | Marine, Food | ISO 6158 |
| Tin Plated | 3-10μm | 150-200 hours | Electrical, HVAC | ISO 2093 |
| Passivated | 0.5-2μm | 150 hours | Corrosive Areas | ISO 10546 |
International Standards & Certifications
Global Compliance & Approvals
IEC 62444: Cable glands and conduit fittings
BS 4568: Specification for steel conduit and fittings
ANSI C80.3: Steel rigid conduit
ASTM B16: Standard specification for free-cutting brass rod
UL 514B: Conduit, tubing, and cable fittings
RoHS Compliance: Restriction of hazardous substances
Testing & Certification Standards
Thread Testing: Gauging per ISO 228
Corrosion Testing: Salt spray per ASTM B117
IP Testing: Ingress protection per IEC 60529
Mechanical Testing: Torque and load testing
Material Certification: Mill certificates with full traceability
Industry Applications
Electrical Power Distribution
Distribution Boards: Secure conduit entries in electrical panels
Control Panels: Reliable cable entry in automation systems
Switchgear: Protected connections in power distribution equipment
Motor Control Centers: Organized cable management in MCCs
Industrial Automation
PLC Enclosures: Protected cable entry for control systems
Sensor Connections: Reliable conduit termination for sensors
Machine Tool Wiring: Secure cable protection in machinery
Process Control: Protected connections in industrial processes
Building Services
Commercial Buildings: Electrical conduit systems in structures
Hospital Installations: Reliable medical equipment connections
Data Centers: Protected cable entry in server rooms
Lighting Systems: Secure conduit connections for lighting
Installation Guidelines & Maintenance
Professional Installation Procedure
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Conduit Preparation: Cut conduit square and deburr internal edges
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Thread Inspection: Verify thread compatibility and condition
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Bush Selection: Choose appropriate size and type for application
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Thread Engagement: Start threads carefully to prevent cross-threading
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Torque Application: Use appropriate tools with specified torque values
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Final Inspection: Verify proper seating and secure installation
Maintenance Best Practices
Regular Inspection: Visual inspection for corrosion, damage, or loosening
Thread Maintenance: Periodic cleaning and anti-corrosion treatment
Torque Verification: Check tightness in critical applications
Corrosion Monitoring: Regular assessment in harsh environments
Replacement Schedule: 25+ year service life with proper installation
Frequently Asked Questions
Q1: What are the advantages of brass conduit bushes over steel?
Brass conduit bushes offer superior corrosion resistance, better electrical conductivity, non-sparking properties, easier installation due to natural lubricity, and compatibility with various environmental conditions including marine and chemical exposures.
Q2: Can brass conduit bushes be used in hazardous areas?
Yes, our brass conduit bushes are suitable for hazardous areas due to their non-sparking characteristics and corrosion resistance. For specific hazardous area certifications, we can provide bushes with appropriate documentation and testing.
Q3: What is the difference between PG and metric thread conduit bushes?
PG threads have an 80° thread angle and are primarily used in Europe for electrical applications, while metric threads have a 60° angle and are used worldwide. We manufacture both types to meet different regional requirements.
Q4: Do you provide custom thread combinations for special applications?
Yes, we specialize in custom conduit bush manufacturing including special thread combinations, unique sizes, custom lengths, and special features. Minimum order quantities apply for custom specifications.
Q5: What is the expected service life of your brass conduit bushes?
Our brass conduit bushes have a service life expectancy of 25+ years in standard applications and 20+ 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 conduit bushes?
We perform 100% dimensional inspection, thread gauge verification, visual examination, and sample mechanical testing. Additionally, we conduct corrosion testing, IP rating testing, electrical continuity testing, and material verification.
Contact Us Today – Request Quote for Brass Conduit Bushes
Ready to discuss your Brass Conduit Bush requirements for electrical installations, industrial automation, marine applications, or custom conduit solutions?
Request a Quote: Send your specifications including bush 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 bush selection guidance, material recommendation, and certification 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
