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Pneumatic Quick Couplers

Pneumatic quick couplers connect and disconnect air lines in one quick motion, no tools required. This collection covers the full range of air quick couplers and plugs across every interchange, from miniature 2 Series to industrial body sizes, in steel, brass, and stainless. Filter by series, body size, thread, and material to find the exact coupler or plug your air system needs.

  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
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    $ 40.69
    $ 40.69 - $ 40.69
    $ 40.69
    $ 32.49
    $ 32.49 - $ 32.49
    $ 32.49

    Foster SL1714, 3/8" Industrial Coupler x 3/8" Push-On Hose Stem, 4 Series, Automatic Sleeve Lock, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster SL1714 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

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    $ 40.69
    $ 40.69 - $ 40.69
    $ 40.69
    $ 32.49
    $ 32.49 - $ 32.49
    $ 32.49
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  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 34.79
    $ 34.79 - $ 34.79
    $ 34.79
    $ 27.89
    $ 27.89 - $ 27.89
    $ 27.89

    Foster FM1714, 3/8" Industrial Coupler x 3/8" Push-On Hose Stem, 4 Series, Automatic, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM1714 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

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    $ 34.79
    $ 34.79 - $ 34.79
    $ 34.79
    $ 27.89
    $ 27.89 - $ 27.89
    $ 27.89
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 38.59
    $ 38.59 - $ 38.59
    $ 38.59
    $ 30.79
    $ 30.79 - $ 30.79
    $ 30.79

    Foster FM4904W, 3/8" Industrial Coupler x 1/2" Hose ID, 4 Series, Automatic, Water, Brass/SS

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM4904W is a Brass/SS 3/8" industrial coupler from the Foster 4 Series — a...

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    $ 38.59
    $ 38.59 - $ 38.59
    $ 38.59
    $ 30.79
    $ 30.79 - $ 30.79
    $ 30.79
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 38.69
    $ 38.69 - $ 38.69
    $ 38.69
    $ 30.99
    $ 30.99 - $ 30.99
    $ 30.99

    Foster SL4904, 3/8" Industrial Coupler x 1/2" Hose ID, 4 Series, Automatic Sleeve Lock, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster SL4904 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

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    $ 38.69
    $ 38.69 - $ 38.69
    $ 38.69
    $ 30.99
    $ 30.99 - $ 30.99
    $ 30.99
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 33.19
    $ 33.19 - $ 33.19
    $ 33.19
    $ 26.59
    $ 26.59 - $ 26.59
    $ 26.59

    Foster FM4904, 3/8" Industrial Coupler x 1/2" Hose ID, 4 Series, Automatic, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM4904 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

    View full details
    $ 33.19
    $ 33.19 - $ 33.19
    $ 33.19
    $ 26.59
    $ 26.59 - $ 26.59
    $ 26.59
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 36.69
    $ 36.69 - $ 36.69
    $ 36.69
    $ 29.29
    $ 29.29 - $ 29.29
    $ 29.29

    Foster FM4804W, 3/8" Industrial Coupler x 3/8" Hose ID, 4 Series, Automatic, Water, Brass/SS

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM4804W is a Brass/SS 3/8" industrial coupler from the Foster 4 Series — a...

    View full details
    $ 36.69
    $ 36.69 - $ 36.69
    $ 36.69
    $ 29.29
    $ 29.29 - $ 29.29
    $ 29.29
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 34.59
    $ 34.59 - $ 34.59
    $ 34.59
    $ 27.69
    $ 27.69 - $ 27.69
    $ 27.69

    Foster FM4804H, 3/8" Industrial Coupler x 3/8" Hose ID, 4 Series, Automatic, Heat/Viton, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM4804H is a Brass 3/8" industrial coupler from the Foster 4 Series — a hi...

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    $ 34.59
    $ 34.59 - $ 34.59
    $ 34.59
    $ 27.69
    $ 27.69 - $ 27.69
    $ 27.69
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 38.29
    $ 38.29 - $ 38.29
    $ 38.29
    $ 30.59
    $ 30.59 - $ 30.59
    $ 30.59

    Foster SL4804, 3/8" Industrial Coupler x 3/8" Hose ID, 4 Series, Automatic Sleeve Lock, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster SL4804 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

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    $ 38.29
    $ 38.29 - $ 38.29
    $ 38.29
    $ 30.59
    $ 30.59 - $ 30.59
    $ 30.59
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 32.79
    $ 32.79 - $ 32.79
    $ 32.79
    $ 26.19
    $ 26.19 - $ 26.19
    $ 26.19

    Foster FM4804, 3/8" Industrial Coupler x 3/8" Hose ID, 4 Series, Automatic, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM4804 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

    View full details
    $ 32.79
    $ 32.79 - $ 32.79
    $ 32.79
    $ 26.19
    $ 26.19 - $ 26.19
    $ 26.19
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 37.89
    $ 37.89 - $ 37.89
    $ 37.89
    $ 30.29
    $ 30.29 - $ 30.29
    $ 30.29

    Foster SL4704, 3/8" Industrial Coupler x 5/16" Hose ID, 4 Series, Automatic Sleeve Lock, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster SL4704 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

    View full details
    $ 37.89
    $ 37.89 - $ 37.89
    $ 37.89
    $ 30.29
    $ 30.29 - $ 30.29
    $ 30.29
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 32.19
    $ 32.19 - $ 32.19
    $ 32.19
    $ 25.79
    $ 25.79 - $ 25.79
    $ 25.79

    Foster FM4704, 3/8" Industrial Coupler x 5/16" Hose ID, 4 Series, Automatic, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM4704 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

    View full details
    $ 32.19
    $ 32.19 - $ 32.19
    $ 32.19
    $ 25.79
    $ 25.79 - $ 25.79
    $ 25.79
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 37.29
    $ 37.29 - $ 37.29
    $ 37.29
    $ 29.79
    $ 29.79 - $ 29.79
    $ 29.79

    Foster SL4604, 3/8" Industrial Coupler x 1/4" Hose ID, 4 Series, Automatic Sleeve Lock, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster SL4604 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

    View full details
    $ 37.29
    $ 37.29 - $ 37.29
    $ 37.29
    $ 29.79
    $ 29.79 - $ 29.79
    $ 29.79
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 31.79
    $ 31.79 - $ 31.79
    $ 31.79
    $ 25.39
    $ 25.39 - $ 25.39
    $ 25.39

    Foster FM4604, 3/8" Industrial Coupler x 1/4" Hose ID, 4 Series, Automatic, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM4604 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

    View full details
    $ 31.79
    $ 31.79 - $ 31.79
    $ 31.79
    $ 25.39
    $ 25.39 - $ 25.39
    $ 25.39
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 36.69
    $ 36.69 - $ 36.69
    $ 36.69
    $ 29.29
    $ 29.29 - $ 29.29
    $ 29.29

    Foster FM4504W, 3/8" Industrial Coupler x 1/2" Male NPT, 4 Series, Automatic, Water, Brass/SS

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM4504W is a Brass/SS 3/8" industrial coupler from the Foster 4 Series — a...

    View full details
    $ 36.69
    $ 36.69 - $ 36.69
    $ 36.69
    $ 29.29
    $ 29.29 - $ 29.29
    $ 29.29
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 38.69
    $ 38.69 - $ 38.69
    $ 38.69
    $ 30.99
    $ 30.99 - $ 30.99
    $ 30.99

    Foster FM4504S, 3/8" Industrial Coupler x 1/2" Male NPT, 4 Series, Automatic, Steam/EPDM, Brass body, Brass sleeve, SS valve

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM4504S is a Brass body, Brass sleeve, SS valve 3/8" industrial coupler fr...

    View full details
    $ 38.69
    $ 38.69 - $ 38.69
    $ 38.69
    $ 30.99
    $ 30.99 - $ 30.99
    $ 30.99
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 38.29
    $ 38.29 - $ 38.29
    $ 38.29
    $ 30.59
    $ 30.59 - $ 30.59
    $ 30.59

    Foster SL4504, 3/8" Industrial Coupler x 1/2" Male NPT, 4 Series, Automatic Sleeve Lock, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster SL4504 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

    View full details
    $ 38.29
    $ 38.29 - $ 38.29
    $ 38.29
    $ 30.59
    $ 30.59 - $ 30.59
    $ 30.59
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 32.39
    $ 32.39 - $ 32.39
    $ 32.39
    $ 25.89
    $ 25.89 - $ 25.89
    $ 25.89

    Foster FM4504, 3/8" Industrial Coupler x 1/2" Male NPT, 4 Series, Automatic, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM4504 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

    View full details
    $ 32.39
    $ 32.39 - $ 32.39
    $ 32.39
    $ 25.89
    $ 25.89 - $ 25.89
    $ 25.89
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 37.69
    $ 37.69 - $ 37.69
    $ 37.69
    $ 30.09
    $ 30.09 - $ 30.09
    $ 30.09

    Foster FM4304W, 3/8" Industrial Coupler x 3/8" Male NPT, 4 Series, Automatic, Water, Brass/SS

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM4304W is a Brass/SS 3/8" industrial coupler from the Foster 4 Series — a...

    View full details
    $ 37.69
    $ 37.69 - $ 37.69
    $ 37.69
    $ 30.09
    $ 30.09 - $ 30.09
    $ 30.09
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 36.89
    $ 36.89 - $ 36.89
    $ 36.89
    $ 29.49
    $ 29.49 - $ 29.49
    $ 29.49

    Foster FM4304S, 3/8" Industrial Coupler x 3/8" Male NPT, 4 Series, Automatic, Steam/EPDM, Brass body, Brass sleeve, SS valve

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM4304S is a Brass body, Brass sleeve, SS valve 3/8" industrial coupler fr...

    View full details
    $ 36.89
    $ 36.89 - $ 36.89
    $ 36.89
    $ 29.49
    $ 29.49 - $ 29.49
    $ 29.49
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 36.49
    $ 36.49 - $ 36.49
    $ 36.49
    $ 29.19
    $ 29.19 - $ 29.19
    $ 29.19

    Foster SL4304, 3/8" Industrial Coupler x 3/8" Male NPT, 4 Series, Automatic Sleeve Lock, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster SL4304 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

    View full details
    $ 36.49
    $ 36.49 - $ 36.49
    $ 36.49
    $ 29.19
    $ 29.19 - $ 29.19
    $ 29.19
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 31.99
    $ 31.99 - $ 31.99
    $ 31.99
    $ 25.59
    $ 25.59 - $ 25.59
    $ 25.59

    Foster FM4304, 3/8" Industrial Coupler x 3/8" Male NPT, 4 Series, Automatic, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM4304 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

    View full details
    $ 31.99
    $ 31.99 - $ 31.99
    $ 31.99
    $ 25.59
    $ 25.59 - $ 25.59
    $ 25.59
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 35.59
    $ 35.59 - $ 35.59
    $ 35.59
    $ 28.49
    $ 28.49 - $ 28.49
    $ 28.49

    Foster FM4104W, 3/8" Industrial Coupler x 1/4" Male NPT, 4 Series, Automatic, Water, Brass/SS

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM4104W is a Brass/SS 3/8" industrial coupler from the Foster 4 Series — a...

    View full details
    $ 35.59
    $ 35.59 - $ 35.59
    $ 35.59
    $ 28.49
    $ 28.49 - $ 28.49
    $ 28.49
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 36.49
    $ 36.49 - $ 36.49
    $ 36.49
    $ 29.19
    $ 29.19 - $ 29.19
    $ 29.19

    Foster FM4104S, 3/8" Industrial Coupler x 1/4" Male NPT, 4 Series, Automatic, Steam/EPDM, Brass body, Brass sleeve, SS valve

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM4104S is a Brass body, Brass sleeve, SS valve 3/8" industrial coupler fr...

    View full details
    $ 36.49
    $ 36.49 - $ 36.49
    $ 36.49
    $ 29.19
    $ 29.19 - $ 29.19
    $ 29.19
    Save 20% Save %
  • Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
    Save 20% Save %
    $ 37.29
    $ 37.29 - $ 37.29
    $ 37.29
    $ 29.79
    $ 29.79 - $ 29.79
    $ 29.79

    Foster SL4104, 3/8" Industrial Coupler x 1/4" Male NPT, 4 Series, Automatic Sleeve Lock, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster SL4104 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

    View full details
    $ 37.29
    $ 37.29 - $ 37.29
    $ 37.29
    $ 29.79
    $ 29.79 - $ 29.79
    $ 29.79
    Save 20% Save %