The Best 4Mm Compression Fitting of 2025 – Reviewed and Top Rated
After hours researching and comparing all models on the market, we find out the Best 4Mm Compression Fitting of 2025. Check our ranking below.
2,893 Reviews Scanned
Rank No. #1
uxcell 5Pcs Brass Compression Tube Fitting, 4mm Tube OD, NPT Thread, Compression Union & Sleeves, Brass Straight Coupling Adapter
- Colour: Brass; Material: Brass; Total Width: 13mm / 0.51"; Intermediate Width: 13mm / 0.51"; Tube Diameter: 4mm / 0.16"; Total Length: 30mm / 1.18"; Disassembled Length: 10mm/18mm/10mm / 0.39"/0.71"/0.39"; Hexagonal Side Width (Both Sides):12mm / 0.47"; Hexagonal Side Width (Middle Head):12mm / 0.47"; Package Content: 5Pcs x Brass Compression Tube Fitting
- Material: Our compression tube fittings are made of brass, which has high compressive strength and high-temperature ductility. They are strong and durable, not easy to rust or fade, and can be used for a long time.
- Design: The compression fittings have compression rings and sleeves, which can firmly fix the pipes in the fittings by rotating and pressing them to achieve the connection of the pipelines; they can ensure a tight connection and prevent leakage.
- Easy To Use: This joint is good in air tightness and pressure resistance, not easy to fall off, easy to install, and does not require welding and flaring tools. Just insert the pipe into the joint, rotate it, and tighten it to complete the connection.
- Wide Application: You can quickly install or remove compression pipe fittings as needed, easy to repair or replace. They are suitable for non-corrosive or corrosive piping systems such as oil, gas, and water, and can be used for water meters, valves, etc.
Rank No. #2
Patikil 4mm Tube OD Brass Compression Sleeves and Ferrules, 20 Pack Brass Compression Insert Fitting Assortment Kit for Air, Water, Gas Pipe
- Color: Brass Tone; Material: Brass; Sleeves Ferrule Size: 4mmx5.5mmx4mm / 0.16"x0.22"x0.16"(ID*OD*H); Insert Fitting Size: 2mmx3.8mmx10.5mm / 0.08"x0.15"x0.41"(ID*OD*H); Suitable for connecting 4mm pipe.Packing List: 10 Pack x Brass Ferrule, 10 Pack x Insert Fitting
- Advantages: The brass ferrule fittings are made of brass, good corrosion resistance. it is durable and reusable. These ferrules have a smooth surface and provide a good seal, providing a secure connection for pipe connections.
- Instruction: Insert the copper pipe with the appropriate diameter into the sleeve, then fix it to pipe connectors with nuts.
- Application: This brass compression sleeves ferrule is widely used in pipe connection for hydraulic and pneumatic systems, HVAC, humidifiers, etc., and it is suitable for connecting copper, brass, aluminum, or plastic tubing.
- Note: Need to confirm your pipe size before ordering.
Rank No. #3
PATIKIL 4mm Tube Brass Compression Sleeve Ferrules, 15 Pack Brass Compression Fittings
- Material: Brass; Color: Gold Tone; Fit Tube OD: 4mm / 0.16"; Ferrule Size: 6mm x 5mm / 0.24" x 0.2"(OD*H); Package List: 15 x Sleeve Ferrule
- Advantage: Made of brass material, which is corrosion resistant, high pressure resistant, durable and has a long service life.
- Instruction: This sleeve ferrule can be connected to copper, brass, aluminum, or plastic tubing. Easy to connect and install.
- Application: The sleeve ferrule is commonly used to connect lines for air, water, oil in a quick and simple way.
- NOTE: Please confirm the size before purchasing it!
Rank No. #4
PATIKIL Brass Tube Fitting 4mm Tube OD 1/8 BSP Male Thread, 3Pcs Compression Pipe Connector Union Straight Coupling Adapter, Gold Tone
- Specification: Color: Gold Tone; Material: Brass; Thread Size: 1/8 BSP; Fit Tube OD: 4mm / 0.16 inch; Total Length: 23.6mm / 0.93 inch; Package List: 3Pcs x Brass Compression Fitting
- Advantage: Made of brass material, it is ductile at high temperatures, resistant to corrosion, and high pressure, strong and durable, good sealing and can be used in many different types of environments. Fittings are easy to assemble without the need for welding, flaring, or deburring and can be connected directly to copper, brass, aluminum, or plastic tubing.
- Application: Brass compression fitting is usually used to connect air, water, and oil pipelines quickly and simply; Suitable for connecting and fixing nylon pipes, copper pipes, aluminum pipe joints, etc.
- Instruction: Keep the pipe extended in place and tighten the joint. After you feel it is tightened to the bottom, slowly tighten it one turn (it is the process of achieving sealing).
- NOTE: Please confirm the size before purchasing it.
Rank No. #5
Lophtnix 304 Stainless Steel Compression Tube Fitting Union 4mm OD x 4mm OD, Pack of 2
- Union for connecting and disconnecting two pipes more easily than couplings.
- Double ferrule fitting reduces possibility of leakage.
- Made from 304 stainless steel that provides higher strength and greater corrosion resistance than untreated stainless steel.
- Operating temperatures: below 450℃/ Working pressure: 25Mpa-48Mpa
- Applicable medium: oil, water, gas and other non-corrosive or corrosive medium.
Rank No. #6
E-outstanding Compression Ferrule Sleeve 50PCS 4mm Brass Double Taper Ferrule Pipe Tube Fittings
- Made of brass, corrosion-resistant and durable.
- High-quality connectors are manufactured according to the highest standards.
- The operating temperature range is -65 to +250 degrees Fahrenheit.
- Brass compression sleeve, used to compress pipe joints.
- Package includes: 50 compression ferrules.
Rank No. #7
Briny River 6Pcs Brass Compression Fitting 4mm Tube OD x 1/8 BSP Male Connector for Air Oil Water Pipe
- Application Use: Ideal for connecting nylon, copper, or aluminum pipes in air, oil, or water systems.
- Thread Specification: Features a standard 1/8 BSP male thread for compatibility with various equipment.
- Tube Compatibility: Designed to fit 4mm outer diameter tubing for tight, leak-resistant connections.
- Material : Made of solid brass for corrosion resistance and long-lasting performance.
- Installation Method: Simple compression design allows for quick and secure manual installation.
Rank No. #8
PATIKIL 4mm Tube OD Brass Compression Sleeves Ferrules, 25 Pack Brass Ferrule Fitting Brass Compression Fitting Assortment Kit for Air Water Gas Pipe
- Color: Brass Tone; Material: Brass; Hole Inner Dia: 4mm / 0.16 inch; Suitable for connecting 4mm(OD) copper pipe.; Total Size: 5.5 x 4.2mm / 0.22 x 0.17 inch (D*H); Packing List: 25 Pack x Brass Ferrule Fittings
- Advantages: The brass ferrule fittings are made of brass, good corrosion resistance. it is durable and reusable. These ferrules have a smooth surface and provide a good seal, providing a secure connection for pipe connections.
- Instruction: Insert the copper pipe with the appropriate diameter into the sleeve, then fix it to pipe connectors with nuts.
- Application: This brass compression sleeves ferrule is widely used in pipe connection for hydraulic and pneumatic systems, HVAC, humidifiers, etc., and it is suitable for connecting copper, brass, aluminum, or plastic tubing.
- Note: Need to confirm your pipe size before ordering.
Rank No. #9
uxcell 4 Set Fit for 4mm Tube Brass Compression Assortment Kit, Sleeve Ferrule & Nut Kits for Water Oil Air Pipe
- Material: Brass; Colour: Yellow; Thread Size: M8x1; Tubing Ferrule Outer Diameter: 5.5mm / 0.22"; Tubing Nut Width Across Flats: 8mm / 0.31"; Tubing Ferrule Total Length: 4mm / 0.16"; Tubing Nut Total Length: 11.5mm / 0.45"; Package Content: 4Set x Tube Brass Compression Assortment Kit
- Material: Our tube compression fittings are made of brass, which is durable, pressure-resistant, wear-resistant, high hardness, corrosion-resistant, and can be used for a long time
- Design: This compression sleeve fitting has a simple structure, fine workmanship, and a smooth surface without burrs. Precision processing, tight bite, good sealing, not easy to leak or loosen, can provide a firm connection for the pipeline
- Easy To Use: Easy to install, no professional tools are required, the connection can be completed with a simple crimping operation; high stability, suitable for a variety of environments; please confirm the size before purchasing
- Wide Application: These sleeve ferrules can be widely used to connect pipes for air, water, fuel, oil and inert gas, suitable for plastic hoses, nylon hoses, copper pipes, and aluminium pipes
Rank No. #10
Goldpea Stainless Steel 304 Compression Union 4mm OD x 4mm OD Tube Fitting, Pack of 2
- Union for connecting and disconnecting two pipes more easily than couplings.
- Double ferrule fitting reduces possibility of leakage.
- Made from 312 stainless steel that provides higher strength and greater corrosion resistance than untreated stainless steel.
- Operating temperatures: below 450℃/ Working pressure: 25Mpa-48Mpa
- Applicable medium: oil, water, gas and other non-corrosive or corrosive medium.
Last update on 2026-04-20 / Affiliate links / Images from Amazon Product Advertising API
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