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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.

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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass Save 20% Save %
$ 661.00
$ 661.00 - $ 661.00
$ 661.00
$ 528.00
$ 528.00 - $ 528.00
$ 528.00

Foster SL4404, 3/8" Industrial Coupler x 1/2" Female NPT, 4 Series, Automatic Sleeve Lock, Brass

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster SL4404 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

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$ 661.00
$ 661.00 - $ 661.00
$ 661.00
$ 528.00
$ 528.00 - $ 528.00
$ 528.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass Save 20% Save %
$ 566.00
$ 566.00 - $ 566.00
$ 566.00
$ 452.00
$ 452.00 - $ 452.00
$ 452.00

Foster FM4404, 3/8" Industrial Coupler x 1/2" Female NPT, 4 Series, Automatic, Brass

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM4404 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
$ 452.00
$ 452.00 - $ 452.00
$ 452.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass Save 20% Save %
$ 650.00
$ 650.00 - $ 650.00
$ 650.00
$ 519.00
$ 519.00 - $ 519.00
$ 519.00

Foster FM4204W, 3/8" Industrial Coupler x 3/8" Female NPT, 4 Series, Automatic, Water, Brass/SS

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM4204W is a Brass/SS 3/8" industrial coupler from the Foster 4 Series — a...

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$ 650.00
$ 650.00 - $ 650.00
$ 650.00
$ 519.00
$ 519.00 - $ 519.00
$ 519.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass Save 20% Save %
$ 564.00
$ 564.00 - $ 564.00
$ 564.00
$ 452.00
$ 452.00 - $ 452.00
$ 452.00

Foster FM4204H, 3/8" Industrial Coupler x 3/8" Female NPT, 4 Series, Automatic, Heat/Viton, Brass

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM4204H is a Brass 3/8" industrial coupler from the Foster 4 Series — a hi...

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$ 564.00
$ 564.00 - $ 564.00
$ 564.00
$ 452.00
$ 452.00 - $ 452.00
$ 452.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 630.00
$ 630.00 - $ 630.00
$ 630.00
$ 504.00
$ 504.00 - $ 504.00
$ 504.00

Foster SL4204, 3/8" Industrial Coupler x 3/8" Female NPT, 4 Series, Automatic Sleeve Lock, Brass

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster SL4204 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

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$ 630.00
$ 630.00 - $ 630.00
$ 630.00
$ 504.00
$ 504.00 - $ 504.00
$ 504.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 552.00
$ 552.00 - $ 552.00
$ 552.00
$ 442.00
$ 442.00 - $ 442.00
$ 442.00

Foster FM4204, 3/8" Industrial Coupler x 3/8" Female NPT, 4 Series, Automatic, Brass

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM4204 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

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$ 552.00
$ 552.00 - $ 552.00
$ 552.00
$ 442.00
$ 442.00 - $ 442.00
$ 442.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 619.00
$ 619.00 - $ 619.00
$ 619.00
$ 495.00
$ 495.00 - $ 495.00
$ 495.00

Foster SL4004, 3/8" Industrial Coupler x 1/4" Female NPT, 4 Series, Automatic Sleeve Lock, Brass

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster SL4004 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

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$ 619.00
$ 619.00 - $ 619.00
$ 619.00
$ 495.00
$ 495.00 - $ 495.00
$ 495.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 549.00
$ 549.00 - $ 549.00
$ 549.00
$ 438.00
$ 438.00 - $ 438.00
$ 438.00

Foster FM4004, 3/8" Industrial Coupler x 1/4" Female NPT, 4 Series, Automatic, Brass

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster FM4004 is a Brass 3/8" industrial coupler from the Foster 4 Series — a hig...

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$ 549.00
$ 549.00 - $ 549.00
$ 549.00
$ 438.00
$ 438.00 - $ 438.00
$ 438.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 557.00
$ 557.00 - $ 557.00
$ 557.00
$ 445.00
$ 445.00 - $ 445.00
$ 445.00

Foster SD13-4, 3/8" Industrial Coupler x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Brass/Steel

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster SD13-4 is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series —...

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$ 557.00
$ 557.00 - $ 557.00
$ 557.00
$ 445.00
$ 445.00 - $ 445.00
$ 445.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 537.00
$ 537.00 - $ 537.00
$ 537.00
$ 430.00
$ 430.00 - $ 430.00
$ 430.00

Foster SD11-4, 3/8" Industrial Coupler x Reusable Hose Fitting, 3/8" ID x 3/4" OD, 4 Series, Brass/Steel

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster SD11-4 is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series —...

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$ 537.00
$ 537.00 - $ 537.00
$ 537.00
$ 430.00
$ 430.00 - $ 430.00
$ 430.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 624.00
$ 624.00 - $ 624.00
$ 624.00
$ 500.00
$ 500.00 - $ 500.00
$ 500.00

Foster BLSD9-4, 3/8" Industrial Coupler x Reusable Hose Fitting, 3/8" ID x 11/16" OD, 4 Series, Ball Lock, Brass/Steel

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster BLSD9-4 is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series ...

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$ 624.00
$ 624.00 - $ 624.00
$ 624.00
$ 500.00
$ 500.00 - $ 500.00
$ 500.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 523.00
$ 523.00 - $ 523.00
$ 523.00
$ 419.00
$ 419.00 - $ 419.00
$ 419.00

Foster SD9-4, 3/8" Industrial Coupler x Reusable Hose Fitting, 3/8" ID x 11/16" OD, 4 Series, Brass/Steel

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster SD9-4 is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series — ...

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$ 523.00
$ 523.00 - $ 523.00
$ 523.00
$ 419.00
$ 419.00 - $ 419.00
$ 419.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 614.00
$ 614.00 - $ 614.00
$ 614.00
$ 492.00
$ 492.00 - $ 492.00
$ 492.00

Foster BLSD7-4, 3/8" Industrial Coupler x Reusable Hose Fitting, 3/8" ID x 5/8" OD, 4 Series, Ball Lock, Brass/Steel

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster BLSD7-4 is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series ...

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$ 614.00
$ 614.00 - $ 614.00
$ 614.00
$ 492.00
$ 492.00 - $ 492.00
$ 492.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 514.00
$ 514.00 - $ 514.00
$ 514.00
$ 411.00
$ 411.00 - $ 411.00
$ 411.00

Foster SD7-4, 3/8" Industrial Coupler x Reusable Hose Fitting, 3/8" ID x 5/8" OD, 4 Series, Brass/Steel

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster SD7-4 is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series — ...

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$ 514.00
$ 514.00 - $ 514.00
$ 514.00
$ 411.00
$ 411.00 - $ 411.00
$ 411.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 600.00
$ 600.00 - $ 600.00
$ 600.00
$ 480.00
$ 480.00 - $ 480.00
$ 480.00

Foster SB7-4, 3/8" Industrial Coupler x Reusable Hose Fitting, 1/4" ID x 5/8" OD, 4 Series, Brass/Steel

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster SB7-4 is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series — ...

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$ 600.00
$ 600.00 - $ 600.00
$ 600.00
$ 480.00
$ 480.00 - $ 480.00
$ 480.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 612.00
$ 612.00 - $ 612.00
$ 612.00
$ 490.00
$ 490.00 - $ 490.00
$ 490.00

Foster SB5-4, 3/8" Industrial Coupler x Reusable Hose Fitting, 1/4" ID x 9/16" OD, 4 Series, Brass/Steel

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster SB5-4 is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series — ...

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$ 612.00
$ 612.00 - $ 612.00
$ 612.00
$ 490.00
$ 490.00 - $ 490.00
$ 490.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 583.00
$ 583.00 - $ 583.00
$ 583.00
$ 468.00
$ 468.00 - $ 468.00
$ 468.00

Foster SB3-4, 3/8" Industrial Coupler x Reusable Hose Fitting, 1/4" ID x 1/2" OD, 4 Series, Brass/Steel

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster SB3-4 is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series — ...

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$ 583.00
$ 583.00 - $ 583.00
$ 583.00
$ 468.00
$ 468.00 - $ 468.00
$ 468.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 595.00
$ 595.00 - $ 595.00
$ 595.00
$ 476.00
$ 476.00 - $ 476.00
$ 476.00

Foster 1814W, 3/8" Industrial Coupler x 1/2" Push-On Hose Stem, 4 Series, Water, Brass/SS

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 1814W is a Brass/SS 3/8" industrial coupler from the Foster 4 Series — a h...

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$ 595.00
$ 595.00 - $ 595.00
$ 595.00
$ 476.00
$ 476.00 - $ 476.00
$ 476.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 500.00
$ 500.00 - $ 500.00
$ 500.00
$ 400.00
$ 400.00 - $ 400.00
$ 400.00

Foster BL1814, 3/8" Industrial Coupler x 1/2" Push-On Hose Stem, 4 Series, Ball Lock, Brass/Steel

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster BL1814 is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series —...

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$ 500.00
$ 500.00 - $ 500.00
$ 500.00
$ 400.00
$ 400.00 - $ 400.00
$ 400.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 474.00
$ 474.00 - $ 474.00
$ 474.00
$ 380.00
$ 380.00 - $ 380.00
$ 380.00

Foster 1814, 3/8" Industrial Coupler x 1/2" Push-On Hose Stem, 4 Series, Brass/Steel

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 1814 is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series — a...

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$ 474.00
$ 474.00 - $ 474.00
$ 474.00
$ 380.00
$ 380.00 - $ 380.00
$ 380.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 564.00
$ 564.00 - $ 564.00
$ 564.00
$ 450.00
$ 450.00 - $ 450.00
$ 450.00

Foster 1714W, 3/8" Industrial Coupler x 3/8" Push-On Hose Stem, 4 Series, Water, Brass/SS

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 1714W is a Brass/SS 3/8" industrial coupler from the Foster 4 Series — a h...

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$ 564.00
$ 564.00 - $ 564.00
$ 564.00
$ 450.00
$ 450.00 - $ 450.00
$ 450.00
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 468.00
$ 468.00 - $ 468.00
$ 468.00
$ 374.00
$ 374.00 - $ 374.00
$ 374.00

Foster BL1714, 3/8" Industrial Coupler x 3/8" Push-On Hose Stem, 4 Series, Ball Lock, Brass/Steel

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster BL1714 is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series —...

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$ 468.00
$ 468.00 - $ 468.00
$ 468.00
$ 374.00
$ 374.00 - $ 374.00
$ 374.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 431.00
$ 431.00 - $ 431.00
$ 431.00
$ 345.00
$ 345.00 - $ 345.00
$ 345.00

Foster 1714, 3/8" Industrial Coupler x 3/8" Push-On Hose Stem, 4 Series, Brass/Steel

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 1714 is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series — a...

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$ 431.00
$ 431.00 - $ 431.00
$ 431.00
$ 345.00
$ 345.00 - $ 345.00
$ 345.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 576.00
$ 576.00 - $ 576.00
$ 576.00
$ 462.00
$ 462.00 - $ 462.00
$ 462.00

Foster 4904S, 3/8" Industrial Coupler x 1/2" Hose ID, 4 Series, Steam/EPDM, Brass body, Brass sleeve, SS valve

Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 4904S is a Brass body, Brass sleeve, SS valve 3/8" industrial coupler from...

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$ 576.00
$ 576.00 - $ 576.00
$ 576.00
$ 462.00
$ 462.00 - $ 462.00
$ 462.00
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