Comprehensive Overview of Premium Brass Stop Plugs
We are a specialised manufacturer and global supplier of precision-engineered Brass Stop Plugs, providing reliable sealing solutions for pipe systems, hydraulic ports, pneumatic connections, and fluid handling applications. Our stop plugs are manufactured from C36000 Free-Cutting Brass, selected for its excellent machinability, reliable mechanical performance, and outstanding corrosion resistance. These essential components are designed to protect threaded ports, seal pipe ends, and prevent contamination in fluid systems during storage, shipping, or maintenance operations. With advanced CNC machining capabilities and comprehensive quality control systems, we deliver brass stop plugs that excel in industrial, marine, hydraulic, and pneumatic applications where reliable sealing and corrosion resistance are essential.
Brass Stop Plugs – Reliable Port Protection & Sealing
Brass Stop Plugs are designed to provide secure, leak-proof sealing of threaded ports, pipe ends, and fluid system connections. These plugs serve multiple purposes including contamination prevention during storage and shipping, system isolation during maintenance, and permanent sealing of unused ports. The superior corrosion resistance of brass makes these plugs ideal for applications where steel plugs would corrode and seize, while the precise threading ensures reliable, reusable sealing performance.
Applications of Brass Stop Plugs
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Hydraulic Systems: Valve ports, cylinder connections, pump interfaces, manifold blocks
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Pneumatic Equipment: Air line ports, valve connections, cylinder ports, control systems
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Pipe Systems: Pipe end protection, temporary line closures, test point sealing
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Marine Applications: Boat plumbing, marine hydraulic systems, seawater line protection
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Industrial Machinery: Equipment fluid ports, lubrication points, cooling system connections
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Process Equipment: Chemical processing, food machinery, pharmaceutical systems
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Manufacturing Plants: Production equipment, automation systems, fluid power circuits
Brass Alloy Specifications for Stop Plugs
| Brass Alloy | UNS Designation | Composition | Key Properties | Applications |
|---|---|---|---|---|
| Free-Cutting Brass | C36000 | 61.5% Cu, 35.5% Zn, 3% Pb | Excellent machinability, good strength, reliable performance | General industrial applications |
| Naval Brass | C46400 | 60% Cu, 39.2% Zn, 0.8% Sn | Superior corrosion resistance, high strength | Marine, chemical, harsh environments |
Brass Stop Plug Technical Specifications
| Parameter | C36000 (Free-Cutting Brass) | C46400 (Naval Brass) |
|---|---|---|
| Tensile Strength (MPa) | 340 – 470 | 380 – 480 |
| Pressure Rating | Up to 3000 PSI | Up to 4000 PSI |
| Temperature Range | -20°C to +120°C | -20°C to +150°C |
| Corrosion Resistance | Excellent | Superior |
Thread Types: NPT, BSP, BSPT, metric parallel, metric tapered
Drive Types: Hex socket, square head, hex head, slotted head
Size Range: 1/8″ to 2″ NPT, M5 to M50 metric
Sealing Types: Tapered thread seal, O-ring seal, bonded washer seal
Product Range & Technical Specifications
Hex Head Stop Plugs
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Design: External hex head for wrench installation
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Applications: General purpose, high torque applications
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Features: Easy installation, high torque capability
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Sizes: 1/8″ to 2″ NPT, M5 to M50 metric
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Benefits: No special tools required, reliable sealing
Square Head Stop Plugs
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Design: Square head for easy installation with standard wrenches
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Applications: General industrial, plumbing applications
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Features: Traditional design, good torque transmission
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Sizes: 1/8″ to 1″ NPT, M5 to M25 metric
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Benefits: Cost-effective, widely compatible
Socket Head Stop Plugs
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Design: Internal hex socket drive
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Applications: Space-constrained applications, clean appearance
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Features: Flush installation, high torque capability
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Sizes: 1/8″ to 1″ NPT, M5 to M25 metric
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Benefits: Compact design, tamper-resistant
O-Ring Seal Stop Plugs
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Design: Flat face with O-ring groove for positive sealing
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Applications: Hydraulic systems, high-pressure applications
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Features: Reliable sealing, reusable
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Sizes: 1/8″ to 1″ NPT, M5 to M25 metric
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Benefits: Bubble-tight seal, easy installation/removal
Manufacturing Processes & Quality Control
Our Brass Stop Plugs are manufactured through precision-controlled processes:
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Material Selection: Certified brass rod meeting ASTM B16 specifications
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CNC Machining: Precision turning of plug body and threading
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Thread Cutting: Precision thread machining to required standards
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Drive Feature Machining: Hex, square, or socket drive formation
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Deburring & Finishing: Comprehensive edge treatment
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Quality Inspection: 100% dimensional and visual inspection
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Pressure Testing: Sample testing to verify pressure rating
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Packaging: Protective packaging to prevent damage
Quality Assurance Tests:
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Dimensional Verification: Comprehensive thread and body dimension checks
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Thread Gauging: Go/No-Go testing to applicable standards
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Pressure Testing: Hydrostatic testing to verify pressure rating
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Material Certification: Full traceability with mill certificates
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Surface Finish: Verification of surface quality
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Drive Feature Inspection: Verification of hex, square, or socket dimensions
Technical Data & Performance Specifications
Pressure Ratings & Torque Specifications
| Plug Size | Thread Type | Pressure Rating | Installation Torque | Proof Pressure |
|---|---|---|---|---|
| 1/8″ | NPT | 3000 PSI | 10-15 Nm | 4500 PSI |
| 1/4″ | NPT | 2500 PSI | 20-30 Nm | 3750 PSI |
| 3/8″ | NPT | 2000 PSI | 30-45 Nm | 3000 PSI |
| 1/2″ | NPT | 1500 PSI | 50-75 Nm | 2250 PSI |
| 3/4″ | NPT | 1200 PSI | 80-120 Nm | 1800 PSI |
| 1″ | NPT | 1000 PSI | 120-180 Nm | 1500 PSI |
Thread Standards & Specifications
| Thread Standard | Thread Angle | Taper | Sealing Method | Applications |
|---|---|---|---|---|
| NPT | 60° | 1:16 | Thread interference | General industrial, North America |
| BSPT | 55° | 1:16 | Thread interference | International, Europe, Asia |
| BSPP | 55° | Parallel | O-ring or washer | Hydraulic systems, Europe |
| Metric | 60° | Various | Thread or O-ring | International, machinery |
Design Features & Benefits
Brass Stop Plug Advantages
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Superior Corrosion Resistance: Excellent performance in harsh environments
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Non-Galling Properties: Easy installation and removal without seizing
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Excellent Machinability: Precision threads for reliable sealing
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Good Strength: Withstands installation torque and system pressure
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Temperature Resistance: Reliable performance across wide temperature range
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Reusable Design: Can be installed and removed multiple times
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Chemical Resistance: Suitable for various fluids and environments
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Long Service Life: Maintains sealing performance for extended periods
Performance Characteristics
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Reliable Sealing: Precision threads ensure leak-proof connections
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Easy Installation: Properly designed drive features for efficient installation
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Pressure Integrity: Withstands rated system pressures
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Vibration Resistance: Maintains seal in dynamic applications
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Thermal Stability: Consistent performance across temperature ranges
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Material Compatibility: Suitable for various fluids and gases
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Surface Finish: Smooth surfaces prevent fluid entrapment
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Dimensional Consistency: Tight tolerances for reliable performance
Industry Compliance & Certifications
International Standards Compliance
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ANSI/ASME B1.20.1: Pipe Threads, General Purpose
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ISO 228: Pipe threads where pressure-tight joints are not made on the threads
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ISO 9001:2015: Quality management systems
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RoHS 3: Restriction of hazardous substances
Quality Certifications
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ISO 9001:2015: Quality management system certification
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Material Certifications: Full traceability from raw material to finished product
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Dimensional Certification: Compliance with thread standards
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Pressure Testing Certification: Verification of pressure ratings
Frequently Asked Questions (FAQ)
Q1: What is the difference between NPT and BSP thread types?
NPT (National Pipe Taper) threads have a 60° thread angle and 1:16 taper, primarily used in North America. BSP (British Standard Pipe) threads have a 55° thread angle, with BSPT being tapered and BSPP being parallel. The thread forms are not interchangeable, and using the wrong type can damage both the plug and port. We manufacture both standards to ensure proper compatibility with your equipment.
Q2: Can brass stop plugs be used in hydraulic systems?
Yes, brass stop plugs are excellent for hydraulic systems, particularly when proper thread sealant is used. The corrosion resistance prevents seizing in hydraulic ports, and the mechanical strength withstands typical hydraulic pressures. For high-pressure hydraulic applications, we recommend O-ring seal plugs or proper application of thread sealant to ensure leak-proof performance.
Q3: What is the pressure rating of brass stop plugs?
Pressure ratings vary by size and thread type, typically ranging from 1000 PSI for larger sizes to 3000 PSI for smaller sizes. Tapered thread plugs (NPT, BSPT) generally provide higher pressure ratings due to the thread interference seal. Actual pressure capability depends on proper installation, thread engagement, and use of appropriate sealant. All ratings include a safety factor per industry standards.
Q4: Are brass stop plugs reusable?
Yes, brass stop plugs are designed to be reusable when properly installed and removed. The non-galling properties of brass allow multiple installation cycles without thread damage. However, we recommend inspecting threads before reuse and replacing plugs that show signs of damage or wear. For critical applications, consider using new plugs to ensure reliable sealing.
Q5: How do I select the correct stop plug for my application?
Selection depends on thread type and size, pressure requirements, drive type preference, and environmental conditions. Identify the port thread specification (NPT, BSPT, etc.), choose the appropriate pressure rating, select the drive type based on accessibility and torque requirements, and consider the environment (marine, chemical, etc.) for material selection. Our technical team can assist with proper selection.
Why Choose Our Brass Stop Plugs?
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Material Expertise: Comprehensive knowledge of brass alloys and applications
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Precision Manufacturing: Advanced CNC machining for consistent quality
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Comprehensive Range: Complete selection of thread types and drive styles
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Quality Assurance: Rigorous inspection and testing protocols
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Custom Solutions: Special threads, sizes, and configurations
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Technical Support: Expert guidance on selection and application
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Competitive Pricing: Cost-effective manufacturing without quality compromise
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Global Compliance: Products meeting international standards
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Reliable Delivery: Consistent on-time delivery performance
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Technical Documentation: Complete specifications and certifications
Call to Action – Contact Us Today
Protect your fluid systems with our premium brass stop plugs. Contact us for quotations, technical specifications, or application engineering support.
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Request a Quote: Email your requirements to sales@jambrass.com for comprehensive pricing
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Technical Consultation: +91-22-43449300 – Speak with our fluid system specialists
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Documentation Request: sales@jambrass.com – Request detailed specifications
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Office Address: 1406, 14th Floor, Dalamal Tower, Nariman Point, Mumbai – 400021, Maharashtra, India
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Factory Address: Plot 10B, GIDC Industrial Estate, Shanker Tekari, Udyognagar, Jamnagar, Gujarat – 361004
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Samples Available: Contact us for evaluation samples
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OEM Partnerships: Comprehensive support for equipment manufacturers
We look forward to providing you with the highest quality brass stop plugs for your port protection requirements.
