Brass Hose Barbs NPTF Hose Barbs Brass Hose Couplings
FOB Price $9.90/Kilogram
BRASS HOSE BARBS BRASS HOSE COUPLINGS NPTF NPT THREADED HOSE BARBS HOSE COUPLINGS We offer CNC machined high volume Brass hose barbs and Brass hose couplings with NPTF and NPT threads.
Sizes: 1/4″ NPT 1/4″ NPTF 3/8″ NPT 3/8″ NPTF 1/2″ NPT 1/2″ NPTF 3/4″ NPT 3/4″ NPTF
| Grade | Composition | Properties | Recommended Applications |
|---|---|---|---|
| C360 Brass (Free-Cutting Brass) | 61.5% Copper, 35.5% Zinc, 3% Lead | Excellent machinability, good corrosion resistance | General-purpose applications, non-potable water systems |
| C353 Brass (Leaded Brass) | 61% Copper, 37.5% Zinc, 1.5% Lead | Good strength, moderate corrosion resistance | Industrial fluid handling, air compressor systems |
| C464 Naval Brass | 60% Copper, 39.2% Zinc, 0.8% Tin | Superior corrosion resistance, especially in marine environments | Marine applications, saltwater exposure, chemical processing |
| C651 Low-Lead Brass | 60% Copper, 39.8% Zinc, <0.25% Lead | Compliant with low-lead regulations | Potable water systems, food processing, medical applications |
| C694 Silicon Brass | 82% Copper, 16% Zinc, 2% Silicon | High strength, excellent corrosion resistance | High-pressure applications, harsh chemical environments |
| Size Range | Pressure Rating | Key Features |
|---|---|---|
| 1/8″ to 2″ NPTF thread | Up to 1000 PSI (size dependent) | Hex body for wrench tightening, precision-machined barbs |
| Hose ID: 1/8″ to 2″ | Temperature range: -65°F to 250°F | Available in straight, 45°, and 90° configurations |
| Size Range | Pressure Rating | Key Features |
|---|---|---|
| 1/8″ to 1-1/2″ NPTF thread | Up to 800 PSI (size dependent) | Hex body for wrench tightening, deep thread engagement |
| Hose ID: 1/8″ to 1-1/2″ | Temperature range: -65°F to 250°F | Available in straight, 45°, and 90° configurations |
| Finish Type | Appearance | Properties | Applications |
|---|---|---|---|
| Natural Brass | Yellowish-gold | No additional coating, natural corrosion resistance | General-purpose applications, indoor use |
| Chrome Plated | Bright silver | Enhanced corrosion resistance, decorative appearance | Visible installations, moderately corrosive environments |
| Nickel Plated | Satin silver | Superior corrosion resistance, chemical resistance | Chemical processing, outdoor installations |
| Clear Coated | Glossy brass | Prevents tarnishing while maintaining brass appearance | Architectural applications, decorative installations |
| Passivated | Matte brass | Chemical treatment that improves corrosion resistance | Industrial environments, moderate chemical exposure |
| Dimension | Tolerance | Impact on Performance |
|---|---|---|
| Thread dimensions | ±0.003″ for threads up to 1/2″ ±0.005″ for threads above 1/2″ |
Critical for leak-free sealing and proper engagement |
| Barb diameter | +0.005″ / -0.000″ | Ensures proper hose grip without over-stretching |
| Barb length | ±0.010″ | Affects insertion depth and hose retention |
| Hex dimension | ±0.005″ | Ensures proper wrench fit for installation |
| Wall thickness | ±0.008″ | Critical for pressure rating and structural integrity |
| Concentricity | 0.005″ TIR max | Prevents vibration and ensures proper flow characteristics |
Quality Control Standards: Brass NPTF hose barbs typically conform to SAE J512, ASME B1.20.3 (for NPTF threads), and ASTM B16 (for brass material specifications).
Automotive & Transportation
- Fuel delivery systems
- Cooling systems
- Hydraulic brake lines
- Power steering systems
- Transmission cooling
Industrial Manufacturing
- Pneumatic control systems
- Hydraulic power units
- Lubrication systems
- Process fluid transfer
- Equipment cooling circuits
Agriculture
- Irrigation systems
- Sprayer equipment
- Hydraulic implements
- Fuel systems for equipment
- Livestock watering systems
Marine
- Bilge pumping systems
- Engine cooling
- Fuel delivery
- Hydraulic steering
- Freshwater plumbing
Food & Beverage Processing
- Transfer of non-acidic liquids
- Clean-in-place systems
- Water treatment
- Beverage dispensing (with low-lead brass)
- Processing equipment
HVAC Systems
- Refrigerant lines
- Chilled water systems
- Condensate drainage
- Compressor connections
- Heat exchanger plumbing
Male vs. Female NPTF Brass Hose Barbs Comparison
Male NPTF Hose Barbs
- Connection Type: External threads that connect to female ports
- Advantages:
- More common and widely available
- Generally lower profile connection
- Typically higher pressure rating
- Easier to clean and maintain
- Best Used When:
- Connecting to existing female threaded ports
- Space is limited
- Higher pressure is required
Female NPTF Hose Barbs
- Connection Type: Internal threads that connect to male ports
- Advantages:
- Protects male threads from damage
- Can connect directly to standpipes
- Often provides better thread engagement
- Can be more secure in high-vibration environments
- Best Used When:
- Connecting to existing male threaded ports
- Thread protection is a concern
- Connecting to fixed standpipes
Frequently Asked Questions
What is the difference between NPT and NPTF threads?
NPT (National Pipe Taper) and NPTF (National Pipe Taper Fuel) threads share the same pitch and angle, but NPTF threads have a slightly different crest and root design that enables a dryseal connection. While NPT threads typically require sealant to prevent leaks, properly machined NPTF threads can form leak-tight connections without additional sealant in most applications, making them ideal for fuel and hydraulic systems.
Are brass NPTF hose barbs suitable for potable water applications?
Only low-lead brass (such as C651) NPTF hose barbs should be used for potable water applications. These comply with regulations like the Safe Drinking Water Act (SDWA) and NSF/ANSI Standard 61, which require less than 0.25% lead content for components in contact with drinking water. Always verify that the specific brass fittings are certified for potable water use before installation.
What is the maximum pressure rating for brass NPTF hose barbs?
Pressure ratings vary by size, wall thickness, and specific design, but general guidelines are: – 1/8″ to 1/4″: Up to 1000 PSI – 3/8″ to 1/2″: Up to 800 PSI – 3/4″ to 1″: Up to 500 PSI – 1-1/4″ to 2″: Up to 300 PSI Always verify the specific manufacturer’s pressure ratings and apply appropriate safety factors based on your application.
How do I select the correct hose barb size for my application?
Select a hose barb based on: 1. Hose inside diameter (ID) – The barb should match the ID of your hose 2. Thread size – Match the NPTF thread to your connecting component 3. Flow requirements – Ensure the barb’s inner diameter won’t restrict required flow rates 4. Pressure rating – Verify the barb can handle your system’s maximum pressure plus a safety margin 5. Temperature range – Confirm compatibility with your operating temperatures
Can brass NPTF hose barbs be used with all types of hoses?
Brass NPTF hose barbs are compatible with many hose materials, including rubber, PVC, polyurethane, and some silicone hoses. However, they should not be used with hoses containing chemicals that can react with brass, such as ammonia or certain acids. For chemical compatibility, verify with both the hose manufacturer and fitting supplier. Secure attachment typically requires hose clamps, crimped ferrules, or other retention devices matched to the application.
How do I prevent galvanic corrosion when using brass hose barb fittings?
To prevent galvanic corrosion when using brass NPTF hose barbs: 1. Avoid direct contact between brass and dissimilar metals, especially aluminum or steel 2. Use dielectric unions or insulators between dissimilar metals when necessary 3. Apply appropriate protective coatings at junction points 4. Consider using brass fittings with protective finishes like nickel plating 5. Ensure proper electrical grounding of systems to minimize potential differences
- Inspect fittings for damage or defects before installation
- Clean threads thoroughly before assembly
- Use appropriate thread sealant if needed (though typically not required for NPTF)
- Warm the hose end in hot water for easier installation on the barb
- Insert the hose fully onto all barbs
- Use appropriate clamping method (clamps, crimps, or ferrules) sized for the application
- Tighten fittings to specified torque values:
- 1/8″ NPTF: 5-8 ft-lbs
- 1/4″ NPTF: 10-15 ft-lbs
- 3/8″ NPTF: 15-20 ft-lbs
- 1/2″ NPTF: 20-25 ft-lbs
- 3/4″ NPTF: 30-40 ft-lbs
- 1″ NPTF: 40-50 ft-lbs
- Pressure test the system before full operation
