Compression tube nuts are critical components for creating secure, leak-free connections in diverse tubing systems, from hydraulic and pneumatic lines to fuel and air transport. They are typically employed in applications requiring robust, reliable seals without soldering or flaring. Products were evaluated based on material composition, operational pressure and temperature tolerances, tube compatibility, and user-reported ease of installation, alongside a thorough feature analysis.
1/4" Brass Compression Tube Nut Fittings | 361-04 (5-PACK)
This offering provides a high maximum operating pressure and wide temperature range, suitable for demanding hydraulic and pneumatic applications.
Search on AmazonLTWFITTING 1/4-Inch Brass Compression Nut,Brass Compression Fitting(Pack of 25)
A straightforward brass compression nut, it serves basic 1/4-inch OD tubing needs reliably without additional features.
Search on AmazonSiptenk 255PCS Brass Compression Sleeves Ferrules Inserts Nuts Fittings for Tube OD 1/2" 3/8" 5/16" 1/4" 3/16" 1/8", 6 Sizes Hose Compression Fitting Brass Ferrule Kit
$27.99
The extensive kit includes multiple sizes of ferrules and nuts, indicating a comprehensive solution for varied tubing projects.
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- Excellent for use in instrumentation, hydraulic and pneumatic systems, compression fittings are reliable and reusable.
- These brass compression tube nuts provide vibration resistance - Use with aluminum, copper, and plastic tubing.
- Maximum operating pressure of 1200 PSI. Temperature range: -65°F to +250°F with metal tubing
- Meets specifications and standards of ASA, ASME and SAE. Made of CA360 Brass.
- SIPTENK 255PCS BRASS COMPRESSION FITTINGS FOR 6 SIZES OD TUBE: Sleeves Ferrules 1/2" 10pcs, 3/8" 16pcs, 5/16" 16pcs, 1/4" 20pcs, 3/16" 20pcs, 1/8" 20pcs; Inserts 1/2" 10pcs, 3/8" 16pcs, 5/16" 16pcs, 1/4" 20pcs, 3/16" 20pcs, 1/8" 20pcs; Nuts:1/2" 5pcs...
- HIGH-QUALITY BRASS MATERIAL: Siptenk compression fitting are made of brass, which is strong and hard, with better corrosion and rust resistance and pressure resistance, so you can use the brass fittings for a long time.
- PRECISE & EXCELLENT WORKMANSHIP: Precise and diverse brass ferrule kit sizes, with fine manufacturing process for smooth surface without burrs, ensure users have a good purchase experience and meet different need.
- EASY TO INSTALL: The brass compression insert, sleeve ferrule, nuts, used with aluminum, stainless steel, plastic and copper tubing, can connect lines for air, water, fuel, oil and inert gases, while inserts are mainly used to insert into hoses quickly...
- PLASTIC STORAGE CONTAINER: Includes a durable but lightweight plastic storage container, which can protect the hose compression fitting from rusting and keeps all screws stored intact.
- WIDE ALLPICATION: The sleeves ferrules & inserts & nuts are widely used in hydraulic and pneumatic systems, connecting lines for air, water, fuel, oil and inert gases, such as connecting copper, brass, aluminum or plastic pipes.
- AFTER-SALES: If you have any questions about Siptenk brass compression fittings kit, please feel free to contact us. We will do our best to help you solve the problem and ensure to provide you with a pleasant shopping experience.
- Introduction: The brass compression sleeve ferrules inserts nuts are suitable for the outer diameter ( 3/8" ) of pipes and can be used for plastic, copper, brass, or aluminum pipes.
- Sizes & Quantity: 55pcs of brass compression fittings, suitable for pipes with an outer diameter : sleeve rings 3/8" 25pcs ; inserts 3/8" 25pcs ; nuts: 3/8" 5pcs.
- Material: Brass. Low magnetic permeability, good ductility and plasticity at high temperatures, higher strength and hardness, able to withstand certain mechanical stress and wear, not easily corroded in humid environments, and not easily damaged during...
- Craftsmanship: The brass compression fittings assortment kit are with fine manufacturing process, smooth surface without burrs, with good polishability and a beautiful golden appearance.
- Easy to Use: These compression fittings are easy to assemble, without the need for welding, flaring, or deburring. They can be easily connected to other components through threaded connections, welding, crimping, etc. When it is necessary to replace them...
- Plastic Storage container: Includes a durable and lightweight plastic storage container that can provide a neat and orderly space, making products easy to classify and find, and can provide buffering and protection for products, reducing damage caused by...
- Application: The copper line compression fittings are often used in fields such as machinery, automobiles, and ships, and can quickly and easily connect various pipelines such as air, water, fuel, oil, and inert gases, such as water heating pipes...
- Prompt reply: If you have any questions about the hose repair ferrule insert nut kit, please feel free to contact us at any time. We will do our best to provide you with help and give you a satisfactory answer.
- Material: Brass; Color: Yellow; Thread Size: M10x1; Width: 10mm / 0.39"; Length: 11.5mm / 0.45"; Package Content: 10Pcs x Tube Brass Nut
- Material: Our oil pipe nuts are made of brass, which is durable, pressure-resistant, wear-resistant, hard, and corrosion-resistant, and can be used for a long time
- Design: The oil pipe nuts have a simple structure, fine workmanship, smooth surface, and no burrs. Precision processing, clear threads, uniform force, and various sizes and specifications are available to meet the connection needs of oil pipes of...
- Easy To Use: Easy to install, stable and durable after installation, not easy to fall off; please confirm the size before purchasing
- Wide Application: These nuts can be widely used to connect pipes for air, water, fuel, oil, and inert gas, suitable for plastic hoses, nylon hoses, copper pipes, and aluminum pipes
- Brief Description: You'll get 120pcs of 1/4 inches compression fittings including 50pcs compression sleeve ferrule, 50pcs Insert and 20pcs Nuts
- Sizes: 1/4 inches-50pcs compression sleeve ferrule, 50pcs compression insert, 6pcs nuts
- High-Quality Material: Solid , High Quality and durable brass construction. Lead Free, Corrosion resistance, ductility at high temperatures, and low magnetic permeability
- Easy to Use: This fittings are easy to assemble requiring no soldering, flaring or deburring. Standard Compression Fittings are suitable for a wide variety of applications
- Applications: This brass compression kit can be connected to copper, brass, aluminum, or plastic tubing. No flaring tool is required for assembly.It can keeps plastic tube from collapsing when tightened. And prevent leakage
- Premium Quality: Aienxn compression fittings are made of solid , high quality and brass construction
- Package Include: 1/4" 20pcs sleeve ferrules, 20pcs inserts, 10pcs nuts; Total 50pcs in a box
- Wide Application: The insert, sleeve ferrule, nut is commonly used to connect lines for water, air, fuel, oil and inert gases in a quick and simple way
- Features: Aienxn compression fittings have corrosion resistance, ductility at high temperatures and low magnetic permeability
- Timely Reply: If you have any questions about our products, please feel free to contact us
- Introduction: The brass compression sleeve ferrules inserts nuts are suitable for the outer diameter (1/8", 1/16", 1/4", 5/16", 3/8", 1/2") of pipes and can be used for plastic, copper, brass, or aluminum pipes.
- Sizes & Quantity: 280pcs of brass compression fittings, suitable for pipes with an outer diameter of 6 sizes: sleeve rings 1/2" 10pcs, 3/8" 15pcs, 5/16" 15pcs, 1/4" 25pcs, 3/16" 25pcs, 1/8" 25pcs; inserts 1/2" 10pcs, 3/8" 15pcs, 5/16" 15pcs, 1/4" 25pcs...
- Material: Brass. Low magnetic permeability, good ductility and plasticity at high temperatures, higher strength and hardness, able to withstand certain mechanical stress and wear, not easily corroded in humid environments, and not easily damaged during...
- Craftsmanship: The brass compression fittings assortment kit are with fine manufacturing process, smooth surface without burrs, with good polishability and a beautiful golden appearance.
- Easy to Use: These compression fittings are easy to assemble, without the need for welding, flaring, or deburring. They can be easily connected to other components through threaded connections, welding, crimping, etc. When it is necessary to replace them...
- Plastic Storage container: Includes a durable and lightweight plastic storage container that can provide a neat and orderly space, making products easy to classify and find, and can provide buffering and protection for products, reducing damage caused by...
- Application: The copper line compression fittings are often used in fields such as machinery, automobiles, and ships, and can quickly and easily connect various pipelines such as air, water, fuel, oil, and inert gases, such as water heating pipes...
- Prompt reply: If you have any questions about the hose repair ferrule insert nut kit, please feel free to contact us at any time. We will do our best to provide you with help and give you a satisfactory answer.
- 6 month no hassle warranty
- For Use with Copper, Brass, Aluminum or Plastic Tubing (Plastic Tubing Requires An Insert)
- Meets SAE, ASA and ASME Specifications and Standards
- Pressure Rating: 500 PSI
- Temperature Rating: - 65 F to 250 F
- SIPTENK 1/4" 180PCS BRASS COMPRESSION FITTINGS: 75pcs sleeves ferrules, 75pcs tubing inserts, and 30pcs nuts for O/D 1/4" tube.
- HIGH-QUALITY BRASS MATERIAL: Siptenk compression fittings are made of brass, strong and hard, with better corrosion and rust resistance and pressure resistance, so you can use the brass fittings for a long time.
- PRECISE & EXCELLENT WORKMANSHIP: Precise and diverse hose compression fitting sizes, with fine manufacturing process for smooth surface without burrs, ensure users have a good purchase experience and meet different need.
- EASY TO INSTALL: The brass ferrules sleeves, used with plastic and copper tubing, can connect lines for air, water, fuel, oil and inert gases, while inserts are mainly used to insert into hoses quickly and easily.
- PLASTIC STORAGE CONTAINER: Includes a durable but lightweight plastic storage container, which can protect the hose compression fitting from rusting and keeps all screws stored intact.
- WIDE ALLPICATION: Brass compression sleeves ferrules inserts and nuts are widely used in hydraulic and pneumatic systems, connecting lines for air, water, fuel, oil and inert gases, such as connecting copper, brass, aluminum or plastic pipes.
- AFTER-SALES: If you have any questions about Siptenk brass compression fittings kit, please feel free to contact us. We will do our best to help you solve the problem and ensure to provide you with a pleasant shopping experience.
- Short flare nut for connecting to a tube or fitting
- Connects to copper, brass, aluminum, or steel tubing
- Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability
- Operating temperature range of -65 to +250 degrees F
- Resists mechanical pullout for a more secure connection
- These fittings contain lead and are not allowed by federal law to be installed for potable water use in the U.S.A. and its territories.
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Last update on 2026-07-18 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Compression Tube Nuts
Material and Construction Quality
Brass is the standard for corrosion resistance and ductility in compression tube nuts. Brands like GASHER and LTWFITTING consistently use brass, which is crucial for longevity in varied environments such as fuel or air lines. Users typically find that higher quality brass, as emphasized by Siptenk with its "HIGH-QUALITY BRASS MATERIAL," translates to better thread integrity and less deformation during tightening. The specific alloys can vary, impacting factors like magnetic permeability, which might be a consideration in sensitive instrumentation setups. A well-machined nut ensures a precise fit with the ferrule and tube, minimizing potential leak points under stress.
Operating Pressure and Temperature Tolerances
The operational limits are critical for safety and performance in any system. Products like the Discount Hydraulic Hose.com 361-04 stand out with a robust 1200 PSI maximum operating pressure, significantly higher than the 150 PSI specified for the GASHER 20PCS fitting. This divergence dictates suitability for high-pressure hydraulic systems versus lower-pressure fuel or air lines. Similarly, the temperature range, often -65°F to +250°F with metal tubing, needs to align with the application's environment to prevent material degradation or seal failure. Ignoring these specifications can lead to system malfunction or hazardous leaks in practice.
Tube Compatibility and Thread Specifications
Understanding the tube OD and thread type is paramount for a proper connection. While many products, including those from LTWFITTING and Discount Hydraulic Hose.com, focus on 1/4" OD tubing, specialized kits like Siptenk's offer a range of sizes from 1/8" to 1/2". The thread specification, such as the 7/16"-24 UNS thread on the Generic 1/4" OD kit, determines compatibility with existing valves or components. Users often report that ensuring a precise match between the nut, ferrule, and tube material (aluminum, copper, or plastic) is key to achieving a reliable, vibration-resistant seal, as highlighted in the features of the Discount Hydraulic Hose.com product.
Pros & Cons
1/4" Brass Compression Tube Nut Fittings | 361-04 (5-PACK)
Pros
- High 1200 PSI pressure rating supports demanding applications.
- Wide temperature range (-65°F to +250°F) for diverse environments.
- Explicitly stated vibration resistance, crucial for dynamic systems.
- Compatible with multiple tubing materials (aluminum, copper, and plastic).
Cons
- Only available in a 5-pack, which may be insufficient for larger projects.
- Specific 1/4" size limits versatility for other tube diameters.
GASHER 20PCS Brass 1/4" Compression Fitting, Brass Compression Nut
Pros
- Brass material provides good corrosion resistance and ductility.
- Widely applicable for fuel, air, liquid, oil, gas, and vacuum lines.
- 20-piece pack offers better value for common, recurring needs.
- Standard temperature range suitable for many general applications.
Cons
- Lower 150 PSI working pressure limits suitability for heavy-duty or high-pressure systems.
- Specific 1/4" size, similar to other single-size offerings.
Siptenk 255PCS Brass Compression Sleeves Ferrules Inserts Nuts Fittings for Tube OD 1/2" 3/8" 5/16" 1/4" 3/16" 1/8", 6 Sizes Hose Compression Fitting Brass Ferrule Kit
Pros
- Comprehensive kit includes 6 different OD sizes, enhancing versatility.
- Comes with sleeves, ferrules, inserts, and nuts for complete connections.
- Emphasizes high-quality brass material for durability.
- Precise and excellent workmanship for smooth installation.
Cons
- No explicit pressure or temperature ratings provided, requiring user verification.
- Higher initial cost due to the extensive kit nature, potentially more than a user needs.
Common Mistakes to Avoid
Ignoring Pressure and Temperature Specifications
A frequent oversight is installing a compression tube nut without verifying its operational limits against system requirements. For instance, using a GASHER fitting rated for 150 PSI in a hydraulic system demanding 1200 PSI, like those compatible with the Discount Hydraulic Hose.com 361-04, will inevitably lead to failure. Similarly, operating outside the specified temperature range of -65°F to +250°F can degrade the brass or the tubing material, compromising the seal.
Mismatched Tube OD and Thread Sizes
Users often mistakenly assume all "1/4-inch" nuts are universally compatible. While many products like LTWFITTING's specify 1/4" OD, the accompanying ferrule and the nut's internal threading must precisely match the tube and mating component. Attempting to force a slightly off-size tube or using an incorrect thread type, such as ignoring the 7/16"-24 UNS thread on the Generic kit, will result in leaks or damaged threads, rendering the connection unreliable.
Neglecting Tubing Material Compatibility
Not all compression nuts are suitable for every tubing material. The Discount Hydraulic Hose.com product explicitly states compatibility with aluminum, copper, and plastic tubing. Using a standard brass nut with certain rigid or exotic tubing materials without confirming compatibility can lead to inadequate compression, tube deformation, or an inability to form a proper seal, particularly in high-vibration environments.
