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Foster

Foster quick couplers set the standard in pneumatic and hydraulic connections. Part of the ZSI-Foster line, Foster couplers and plugs cover the full range of industrial interchanges and body sizes in steel, brass, and stainless construction. Built for reliable, repeatable connections in air and fluid systems. Shop the full Foster range below.

  • 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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    $ 702.00
    $ 702.00 - $ 702.00
    $ 702.00
    $ 563.00
    $ 563.00 - $ 563.00
    $ 563.00

    Foster FM1814W, 3/8" Industrial Coupler x 1/2" Push-On Hose Stem, 4 Series, Automatic, Water, Brass/SS

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM1814W is a Brass/SS 3/8" industrial coupler from the Foster 4 Series — a...

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    $ 702.00
    $ 702.00 - $ 702.00
    $ 702.00
    $ 563.00
    $ 563.00 - $ 563.00
    $ 563.00
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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
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    $ 733.00
    $ 733.00 - $ 733.00
    $ 733.00
    $ 587.00
    $ 587.00 - $ 587.00
    $ 587.00

    Foster SL1814, 3/8" Industrial Coupler x 1/2" 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 SL1814 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

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    $ 733.00
    $ 733.00 - $ 733.00
    $ 733.00
    $ 587.00
    $ 587.00 - $ 587.00
    $ 587.00
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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
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    $ 631.00
    $ 631.00 - $ 631.00
    $ 631.00
    $ 505.00
    $ 505.00 - $ 505.00
    $ 505.00

    Foster FM1814, 3/8" Industrial Coupler x 1/2" Push-On Hose Stem, 4 Series, Automatic, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM1814 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

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    $ 631.00
    $ 631.00 - $ 631.00
    $ 631.00
    $ 505.00
    $ 505.00 - $ 505.00
    $ 505.00
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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
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    $ 716.00
    $ 716.00 - $ 716.00
    $ 716.00
    $ 572.00
    $ 572.00 - $ 572.00
    $ 572.00

    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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    $ 716.00
    $ 716.00 - $ 716.00
    $ 716.00
    $ 572.00
    $ 572.00 - $ 572.00
    $ 572.00
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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
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    $ 612.00
    $ 612.00 - $ 612.00
    $ 612.00
    $ 491.00
    $ 491.00 - $ 491.00
    $ 491.00

    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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    $ 612.00
    $ 612.00 - $ 612.00
    $ 612.00
    $ 491.00
    $ 491.00 - $ 491.00
    $ 491.00
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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
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    $ 679.00
    $ 679.00 - $ 679.00
    $ 679.00
    $ 542.00
    $ 542.00 - $ 542.00
    $ 542.00

    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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    $ 679.00
    $ 679.00 - $ 679.00
    $ 679.00
    $ 542.00
    $ 542.00 - $ 542.00
    $ 542.00
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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
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    $ 681.00
    $ 681.00 - $ 681.00
    $ 681.00
    $ 545.00
    $ 545.00 - $ 545.00
    $ 545.00

    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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    $ 681.00
    $ 681.00 - $ 681.00
    $ 681.00
    $ 545.00
    $ 545.00 - $ 545.00
    $ 545.00
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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
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    $ 584.00
    $ 584.00 - $ 584.00
    $ 584.00
    $ 468.00
    $ 468.00 - $ 468.00
    $ 468.00

    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...

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    $ 584.00
    $ 584.00 - $ 584.00
    $ 584.00
    $ 468.00
    $ 468.00 - $ 468.00
    $ 468.00
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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
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    $ 645.00
    $ 645.00 - $ 645.00
    $ 645.00
    $ 515.00
    $ 515.00 - $ 515.00
    $ 515.00

    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...

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    $ 645.00
    $ 645.00 - $ 645.00
    $ 645.00
    $ 515.00
    $ 515.00 - $ 515.00
    $ 515.00
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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
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    $ 608.00
    $ 608.00 - $ 608.00
    $ 608.00
    $ 487.00
    $ 487.00 - $ 487.00
    $ 487.00

    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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    $ 608.00
    $ 608.00 - $ 608.00
    $ 608.00
    $ 487.00
    $ 487.00 - $ 487.00
    $ 487.00
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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
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    $ 674.00
    $ 674.00 - $ 674.00
    $ 674.00
    $ 538.00
    $ 538.00 - $ 538.00
    $ 538.00

    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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    $ 674.00
    $ 674.00 - $ 674.00
    $ 674.00
    $ 538.00
    $ 538.00 - $ 538.00
    $ 538.00
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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
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    $ 577.00
    $ 577.00 - $ 577.00
    $ 577.00
    $ 461.00
    $ 461.00 - $ 461.00
    $ 461.00

    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
    $ 577.00
    $ 577.00 - $ 577.00
    $ 577.00
    $ 461.00
    $ 461.00 - $ 461.00
    $ 461.00
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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
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    $ 666.00
    $ 666.00 - $ 666.00
    $ 666.00
    $ 533.00
    $ 533.00 - $ 533.00
    $ 533.00

    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...

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    $ 666.00
    $ 666.00 - $ 666.00
    $ 666.00
    $ 533.00
    $ 533.00 - $ 533.00
    $ 533.00
    Save 20% Save %
  • 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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    $ 566.00
    $ 566.00 - $ 566.00
    $ 566.00
    $ 454.00
    $ 454.00 - $ 454.00
    $ 454.00

    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...

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    $ 566.00
    $ 566.00 - $ 566.00
    $ 566.00
    $ 454.00
    $ 454.00 - $ 454.00
    $ 454.00
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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 %
    $ 656.00
    $ 656.00 - $ 656.00
    $ 656.00
    $ 524.00
    $ 524.00 - $ 524.00
    $ 524.00

    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...

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    $ 656.00
    $ 656.00 - $ 656.00
    $ 656.00
    $ 524.00
    $ 524.00 - $ 524.00
    $ 524.00
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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
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    $ 559.00
    $ 559.00 - $ 559.00
    $ 559.00
    $ 447.00
    $ 447.00 - $ 447.00
    $ 447.00

    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...

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    $ 559.00
    $ 559.00 - $ 559.00
    $ 559.00
    $ 447.00
    $ 447.00 - $ 447.00
    $ 447.00
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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 %
    $ 645.00
    $ 645.00 - $ 645.00
    $ 645.00
    $ 515.00
    $ 515.00 - $ 515.00
    $ 515.00

    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...

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    $ 645.00
    $ 645.00 - $ 645.00
    $ 645.00
    $ 515.00
    $ 515.00 - $ 515.00
    $ 515.00
    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 %
    $ 681.00
    $ 681.00 - $ 681.00
    $ 681.00
    $ 545.00
    $ 545.00 - $ 545.00
    $ 545.00

    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...

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    $ 681.00
    $ 681.00 - $ 681.00
    $ 681.00
    $ 545.00
    $ 545.00 - $ 545.00
    $ 545.00
    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 %
    $ 674.00
    $ 674.00 - $ 674.00
    $ 674.00
    $ 538.00
    $ 538.00 - $ 538.00
    $ 538.00

    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
    $ 674.00
    $ 674.00 - $ 674.00
    $ 674.00
    $ 538.00
    $ 538.00 - $ 538.00
    $ 538.00
    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 %
    $ 570.00
    $ 570.00 - $ 570.00
    $ 570.00
    $ 456.00
    $ 456.00 - $ 456.00
    $ 456.00

    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
    $ 570.00
    $ 570.00 - $ 570.00
    $ 570.00
    $ 456.00
    $ 456.00 - $ 456.00
    $ 456.00
    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 %
    $ 663.00
    $ 663.00 - $ 663.00
    $ 663.00
    $ 529.00
    $ 529.00 - $ 529.00
    $ 529.00

    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
    $ 663.00
    $ 663.00 - $ 663.00
    $ 663.00
    $ 529.00
    $ 529.00 - $ 529.00
    $ 529.00
    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 %
    $ 649.00
    $ 649.00 - $ 649.00
    $ 649.00
    $ 519.00
    $ 519.00 - $ 519.00
    $ 519.00

    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...

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    $ 649.00
    $ 649.00 - $ 649.00
    $ 649.00
    $ 519.00
    $ 519.00 - $ 519.00
    $ 519.00
    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 %
    $ 642.00
    $ 642.00 - $ 642.00
    $ 642.00
    $ 514.00
    $ 514.00 - $ 514.00
    $ 514.00

    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
    $ 642.00
    $ 642.00 - $ 642.00
    $ 642.00
    $ 514.00
    $ 514.00 - $ 514.00
    $ 514.00
    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 %
    $ 563.00
    $ 563.00 - $ 563.00
    $ 563.00
    $ 450.00
    $ 450.00 - $ 450.00
    $ 450.00

    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
    $ 563.00
    $ 563.00 - $ 563.00
    $ 563.00
    $ 450.00
    $ 450.00 - $ 450.00
    $ 450.00
    Save 20% Save %