Hydraulic Couplings

Hydraulic Couplings
  • Gates® - PolarSeal™ 5/16" Aluminum Female SAE Tube O-Ring Nut Swivel Coupling (ACA) with R134a Service Port 90° Bent Tube
    Gates® - PolarSeal™ 5/16" Aluminum Female SAE Tube O-Ring Nut Swivel Coupling (ACA) with R134a Service Port 90° Bent Tube (G45589-0606)
    1
    # mpn1894197621
    PolarSeal™ 5/16" Aluminum Female SAE Tube O-Ring Nut Swivel Coupling (ACA) with R134a Service Port 90° Bent Tube (G45589-0606) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using...
    High quality at an affordable priceExpertly made from premium materials
    $24.30
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Aluminum Hose Length Extender Coupling (ACA)
    Gates® - PolarSeal™ 5/16" Aluminum Hose Length Extender Coupling (ACA) (G45535-0606)
    1
    # mpn1894215288
    PolarSeal™ 5/16" Aluminum Hose Length Extender Coupling (ACA) (G45535-0606) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in...
    High quality at an affordable priceExpertly made from premium materials
    $8.48
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Aluminum Hose Splicer Coupling (ACA) with R12 Thread Service Port
    Gates® - PolarSeal™ 5/16" Aluminum Hose Splicer Coupling (ACA) with R12 Thread Service Port (G45954-0606)
    1
    # mpn1894207634
    PolarSeal™ 5/16" Aluminum Hose Splicer Coupling (ACA) with R12 Thread Service Port (G45954-0606) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and...
    High quality at an affordable priceExpertly made from premium materials
    $14.36
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Aluminum Male Inverted O-Ring Bulkhead 90° Bent Tube Coupling (ACA)
    Gates® - PolarSeal™ 5/16" Aluminum Male Inverted O-Ring Bulkhead 90° Bent Tube Coupling (ACA) (G45602-0606)
    1
    # mpn1894197595
    PolarSeal™ 5/16" Aluminum Male Inverted O-Ring Bulkhead 90° Bent Tube Coupling (ACA) (G45602-0606) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology...
    High quality at an affordable priceExpertly made from premium materials
    $24.00
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Aluminum Male Inverted O-Ring Coupling (ACA)
    Gates® - PolarSeal™ 5/16" Aluminum Male Inverted O-Ring Coupling (ACA) (G45597-0606)
    1
    # mpn1894215244
    PolarSeal™ 5/16" Aluminum Male Inverted O-Ring Coupling (ACA) (G45597-0606) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in...
    High quality at an affordable priceExpertly made from premium materials
    $9.34
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Aluminum Male Metric Flareless Assembly Coupling (ACA)
    Gates® - PolarSeal™ 5/16" Aluminum Male Metric Flareless Assembly Coupling (ACA) (G45935-0608)
    1
    # mpn1894197584
    PolarSeal™ 5/16" Aluminum Male Metric Flareless Assembly Coupling (ACA) (G45935-0608) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...
    High quality at an affordable priceExpertly made from premium materials
    $17.60
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Aluminum Male SAE 45° Flare Coupling (ACA)
    Gates® - PolarSeal™ 5/16" Aluminum Male SAE 45° Flare Coupling (ACA) (G45195-0606)
    1
    # mpn1894207743
    PolarSeal™ 5/16" Aluminum Male SAE 45° Flare Coupling (ACA) (G45195-0606) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in...
    High quality at an affordable priceExpertly made from premium materials
    $8.84
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Aluminum Male SAE Flareless Assembly 90° Block Coupling (ACA)
    Gates® - PolarSeal™ 5/16" Aluminum Male SAE Flareless Assembly 90° Block Coupling (ACA) (G45511-0606)
    1
    # mpn1894197649
    PolarSeal™ 5/16" Aluminum Male SAE Flareless Assembly 90° Block Coupling (ACA) (G45511-0606) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and...
    High quality at an affordable priceExpertly made from premium materials
    $16.81
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Aluminum Male SAE Flareless Assembly Coupling (ACA)
    Gates® - PolarSeal™ 5/16" Aluminum Male SAE Flareless Assembly Coupling (ACA) (G45510-0608)
    1
    # mpn1894207715
    PolarSeal™ 5/16" Aluminum Male SAE Flareless Assembly Coupling (ACA) (G45510-0608) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers...
    High quality at an affordable priceExpertly made from premium materials
    $14.63
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Aluminum Male SAE Flareless Assembly Coupling (ACA)
    Gates® - PolarSeal™ 5/16" Aluminum Male SAE Flareless Assembly Coupling (ACA) (G45510-0606)
    1
    # mpn1894197652
    PolarSeal™ 5/16" Aluminum Male SAE Flareless Assembly Coupling (ACA) (G45510-0606) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers...
    High quality at an affordable priceExpertly made from premium materials
    $11.67
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Aluminum Male SAE Tube O-Ring Nut 45° Bent Tube Coupling (ACA)
    Gates® - PolarSeal™ 5/16" Aluminum Male SAE Tube O-Ring Nut 45° Bent Tube Coupling (ACA) (G45584-0606)
    1
    # mpn1894215276
    PolarSeal™ 5/16" Aluminum Male SAE Tube O-Ring Nut 45° Bent Tube Coupling (ACA) (G45584-0606) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and...
    High quality at an affordable priceExpertly made from premium materials
    $9.00
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Aluminum Male SAE Tube O-Ring Nut 90° Bent Tube Coupling (ACA)
    Gates® - PolarSeal™ 5/16" Aluminum Male SAE Tube O-Ring Nut 90° Bent Tube Coupling (ACA) (G45585-0606)
    1
    # mpn1894207692
    PolarSeal™ 5/16" Aluminum Male SAE Tube O-Ring Nut 90° Bent Tube Coupling (ACA) (G45585-0606) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and...
    High quality at an affordable priceExpertly made from premium materials
    $8.57
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Aluminum Male SAE Tube O-Ring Nut Swivel Coupling (ACA)
    Gates® - PolarSeal™ 5/16" Aluminum Male SAE Tube O-Ring Nut Swivel Coupling (ACA) (G45583-0606)
    1
    # mpn1894222148
    PolarSeal™ 5/16" Aluminum Male SAE Tube O-Ring Nut Swivel Coupling (ACA) (G45583-0606) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...
    High quality at an affordable priceExpertly made from premium materials
    $7.97
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Aluminum Male SAE Tube O-Ring Nut Swivel Coupling (ACA)
    Gates® - PolarSeal™ 5/16" Aluminum Male SAE Tube O-Ring Nut Swivel Coupling (ACA) (G45583-0607)
    1
    # mpn1894215279
    PolarSeal™ 5/16" Aluminum Male SAE Tube O-Ring Nut Swivel Coupling (ACA) (G45583-0607) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...
    High quality at an affordable priceExpertly made from premium materials
    $8.79
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Aluminum Male SAE Tube O-Ring Nut Swivel Coupling (ACA) with R134a Service Port
    Gates® - PolarSeal™ 5/16" Aluminum Male SAE Tube O-Ring Nut Swivel Coupling (ACA) with R134a Service Port (G45580-0606)
    1
    # mpn1894197636
    PolarSeal™ 5/16" Aluminum Male SAE Tube O-Ring Nut Swivel Coupling (ACA) with R134a Service Port (G45580-0606) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art...
    High quality at an affordable priceExpertly made from premium materials
    $23.86
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Steel Female Braze-On Stems Coupling (ACA)
    Gates® - PolarSeal™ 5/16" Steel Female Braze-On Stems Coupling (ACA) (G45527-0606S)
    1
    # mpn1894207709
    PolarSeal™ 5/16" Steel Female Braze-On Stems Coupling (ACA) (G45527-0606S) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in...
    High quality at an affordable priceExpertly made from premium materials
    $8.25
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Steel Female SAE 45° Flare Swivel Coupling (ACA)
    Gates® - PolarSeal™ 5/16" Steel Female SAE 45° Flare Swivel Coupling (ACA) (G45200-0606S)
    1
    # mpn1894215305
    PolarSeal™ 5/16" Steel Female SAE 45° Flare Swivel Coupling (ACA) (G45200-0606S) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers...
    High quality at an affordable priceExpertly made from premium materials
    $11.60
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Steel Female SAE Tube O-Ring Nut Swivel 90° Bent Tube Coupling (ACA)
    Gates® - PolarSeal™ 5/16" Steel Female SAE Tube O-Ring Nut Swivel 90° Bent Tube Coupling (ACA) (G45592-0606S)
    1
    # mpn1894197611
    PolarSeal™ 5/16" Steel Female SAE Tube O-Ring Nut Swivel 90° Bent Tube Coupling (ACA) (G45592-0606S) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology...
    High quality at an affordable priceExpertly made from premium materials
    $11.58
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Steel Female SAE Tube O-Ring Nut Swivel Coupling (ACA) with R134a Service Port 90° Bent Tube
    Gates® - PolarSeal™ 5/16" Steel Female SAE Tube O-Ring Nut Swivel Coupling (ACA) with R134a Service Port 90° Bent Tube (G45589-0606S)
    1
    # mpn1894207684
    PolarSeal™ 5/16" Steel Female SAE Tube O-Ring Nut Swivel Coupling (ACA) with R134a Service Port 90° Bent Tube (G45589-0606S) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using...
    High quality at an affordable priceExpertly made from premium materials
    $28.28
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Steel Hose Splicer Coupling (ACA) with R134a Service Port
    Gates® - PolarSeal™ 5/16" Steel Hose Splicer Coupling (ACA) with R134a Service Port (G45956-0606S)
    1
    # mpn1894197569
    PolarSeal™ 5/16" Steel Hose Splicer Coupling (ACA) with R134a Service Port (G45956-0606S) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...
    High quality at an affordable priceExpertly made from premium materials
    $26.86
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Steel Male Inverted O-Ring Coupling (ACA)
    Gates® - PolarSeal™ 5/16" Steel Male Inverted O-Ring Coupling (ACA) (G45597-0606S)
    1
    # mpn1894197600
    PolarSeal™ 5/16" Steel Male Inverted O-Ring Coupling (ACA) (G45597-0606S) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind....
    High quality at an affordable priceExpertly made from premium materials
    $25.75
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Steel Male SAE Tube O-Ring Nut 90° Bent Tube Coupling (ACA)
    Gates® - PolarSeal™ 5/16" Steel Male SAE Tube O-Ring Nut 90° Bent Tube Coupling (ACA) (G45585-0606S)
    1
    # mpn1894215273
    PolarSeal™ 5/16" Steel Male SAE Tube O-Ring Nut 90° Bent Tube Coupling (ACA) (G45585-0606S) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...
    High quality at an affordable priceExpertly made from premium materials
    $14.01
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/16" Steel Male SAE Tube O-Ring Nut Swivel Coupling (ACA)
    Gates® - PolarSeal™ 5/16" Steel Male SAE Tube O-Ring Nut Swivel Coupling (ACA) (G45583-0607S)
    1
    # mpn1894197634
    PolarSeal™ 5/16" Steel Male SAE Tube O-Ring Nut Swivel Coupling (ACA) (G45583-0607S) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...
    High quality at an affordable priceExpertly made from premium materials
    $17.75
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/8" Aluminum Female SAE 45° Flare Swivel Coupling (ACA)
    Gates® - PolarSeal™ 5/8" Aluminum Female SAE 45° Flare Swivel Coupling (ACA) (G45200-1210)
    1
    # mpn1894207721
    PolarSeal™ 5/8" Aluminum Female SAE 45° Flare Swivel Coupling (ACA) (G45200-1210) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers...
    High quality at an affordable priceExpertly made from premium materials
    $10.57
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/8" Aluminum Female SAE Tube O-Ring Nut Swivel 45° Bent Tube Coupling (ACA)
    Gates® - PolarSeal™ 5/8" Aluminum Female SAE Tube O-Ring Nut Swivel 45° Bent Tube Coupling (ACA) (G45591-1210)
    1
    # mpn1894215257
    PolarSeal™ 5/8" Aluminum Female SAE Tube O-Ring Nut Swivel 45° Bent Tube Coupling (ACA) (G45591-1210) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art...
    High quality at an affordable priceExpertly made from premium materials
    $10.94
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/8" Aluminum Female SAE Tube O-Ring Nut Swivel 45° Bent Tube Coupling (ACA)
    Gates® - PolarSeal™ 5/8" Aluminum Female SAE Tube O-Ring Nut Swivel 45° Bent Tube Coupling (ACA) (G45591-1212)
    1
    # mpn1894197612
    PolarSeal™ 5/8" Aluminum Female SAE Tube O-Ring Nut Swivel 45° Bent Tube Coupling (ACA) (G45591-1212) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art...
    High quality at an affordable priceExpertly made from premium materials
    $12.08
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/8" Aluminum Female SAE Tube O-Ring Nut Swivel 90° Bent Tube Coupling (ACA)
    Gates® - PolarSeal™ 5/8" Aluminum Female SAE Tube O-Ring Nut Swivel 90° Bent Tube Coupling (ACA) (G45592-1212)
    1
    # mpn1894222141
    PolarSeal™ 5/8" Aluminum Female SAE Tube O-Ring Nut Swivel 90° Bent Tube Coupling (ACA) (G45592-1212) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art...
    High quality at an affordable priceExpertly made from premium materials
    $12.15
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/8" Aluminum Female SAE Tube O-Ring Nut Swivel 90° Bent Tube Coupling (ACA)
    Gates® - PolarSeal™ 5/8" Aluminum Female SAE Tube O-Ring Nut Swivel 90° Bent Tube Coupling (ACA) (G45592-1210)
    1
    # mpn1894197608
    PolarSeal™ 5/8" Aluminum Female SAE Tube O-Ring Nut Swivel 90° Bent Tube Coupling (ACA) (G45592-1210) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art...
    High quality at an affordable priceExpertly made from premium materials
    $13.61
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/8" Aluminum Female SAE Tube O-Ring Nut Swivel Coupling (ACA)
    Gates® - PolarSeal™ 5/8" Aluminum Female SAE Tube O-Ring Nut Swivel Coupling (ACA) (G45590-1210)
    1
    # mpn1894215261
    PolarSeal™ 5/8" Aluminum Female SAE Tube O-Ring Nut Swivel Coupling (ACA) (G45590-1210) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...
    High quality at an affordable priceExpertly made from premium materials
    $10.69
    In Stock - Ships within 24 hrs
  • Gates® - PolarSeal™ 5/8" Aluminum Female SAE Tube O-Ring Nut Swivel Coupling (ACA) with R134a Service Port
    Gates® - PolarSeal™ 5/8" Aluminum Female SAE Tube O-Ring Nut Swivel Coupling (ACA) with R134a Service Port (G45588-1210)
    1
    # mpn1894215267
    PolarSeal™ 5/8" Aluminum Female SAE Tube O-Ring Nut Swivel Coupling (ACA) with R134a Service Port (G45588-1210) by Gates®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art...
    High quality at an affordable priceExpertly made from premium materials
    $26.78
    In Stock - Ships within 24 hrs




Couplings are the essential parts of any hydraulic system. They are used to connect hoses and pipes to the other elements of the system including reservoirs, cylinders, valves, and pumps. Designed according to strict requirements, couplings are available in many types and materials compatible with the fluid circulating in the system. It is vital, hence, to pick the most appropriate class of fittings to get smooth running, top performance, and safety. Common materials include brass, stainless steel, aluminum, plastic, and copper. For example, plastic couplings offer good resistance to corrosion, but they are unreliable in high-pressure systems.

The choice of hydraulic couplings depends on the pressure rating, chemical compatibility with the fluid, operating temperature, and sealing capacity. Crimp fittings, coupling barbs, compression fittings, and quick disconnect couplers are the most common types used in hydraulic systems. Typically, they are available in many sizes and shapes to fit various designs. In our online catalog, you can find a wide assortment of these and other couplings including inverted flares, mini-barbed tubes, and reusable models. We also offer a broad selection of adapters to ensure flexibility and efficiency. The costs are reasonable, and the quality is ensured by leading companies in the industry.

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