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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 %
$ 562.00
$ 562.00 - $ 562.00
$ 562.00
$ 449.00
$ 449.00 - $ 449.00
$ 449.00

Foster 310M-4304, 3/8" ARO Coupler x 3/8" Male NPT, 310 Series, Manual, Brass and Steel

Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310M-4304 is a brass and steel 3/8" coupler from ...

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$ 562.00
$ 562.00 - $ 562.00
$ 562.00
$ 449.00
$ 449.00 - $ 449.00
$ 449.00
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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 %
$ 688.00
$ 688.00 - $ 688.00
$ 688.00
$ 550.00
$ 550.00 - $ 550.00
$ 550.00

Foster 310M-4204, 3/8" ARO Coupler x 3/8" Female NPT, 310 Series, Manual, Brass and Steel

Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310M-4204 is a brass and steel 3/8" coupler from ...

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$ 688.00
$ 688.00 - $ 688.00
$ 688.00
$ 550.00
$ 550.00 - $ 550.00
$ 550.00
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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 %
$ 734.00
$ 734.00 - $ 734.00
$ 734.00
$ 587.00
$ 587.00 - $ 587.00
$ 587.00

Foster 310M-4104, 3/8" ARO Coupler x 1/4" Male NPT, 310 Series, Manual, Brass and Steel

Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310M-4104 is a brass and steel 3/8" coupler from ...

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$ 734.00
$ 734.00 - $ 734.00
$ 734.00
$ 587.00
$ 587.00 - $ 587.00
$ 587.00
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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 %
$ 707.00
$ 707.00 - $ 707.00
$ 707.00
$ 566.00
$ 566.00 - $ 566.00
$ 566.00

Foster 310M-4004, 3/8" ARO Coupler x 1/4" Female NPT, 310 Series, Manual, Brass and Steel

Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310M-4004 is a brass and steel 3/8" coupler from ...

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$ 707.00
$ 707.00 - $ 707.00
$ 707.00
$ 566.00
$ 566.00 - $ 566.00
$ 566.00
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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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$ 581.00
$ 581.00 - $ 581.00
$ 581.00
$ 465.00
$ 465.00 - $ 465.00
$ 465.00

Foster 310-4904, 3/8" ARO Coupler x 1/2" Hose ID, 310 Series, Automatic, Brass and Steel

Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310-4904 is a brass and steel 3/8" coupler from t...

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$ 581.00
$ 581.00 - $ 581.00
$ 581.00
$ 465.00
$ 465.00 - $ 465.00
$ 465.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 19% Save %
$ 136.00
$ 136.00 - $ 136.00
$ 136.00
$ 110.00
$ 110.00 - $ 110.00
$ 110.00

Foster 310-49, 3/8" ARO Plug x 1/2" Hose ID, 310 Series, Steel

Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310-49 is a steel 3/8" plug from the Foster 310 S...

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$ 136.00
$ 136.00 - $ 136.00
$ 136.00
$ 110.00
$ 110.00 - $ 110.00
$ 110.00
Save 19% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 571.00
$ 571.00 - $ 571.00
$ 571.00
$ 458.00
$ 458.00 - $ 458.00
$ 458.00

Foster 310-4804, 3/8" ARO Coupler x 3/8" Hose ID, 310 Series, Automatic, Brass and Steel

Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310-4804 is a brass and steel 3/8" coupler from t...

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$ 571.00
$ 571.00 - $ 571.00
$ 571.00
$ 458.00
$ 458.00 - $ 458.00
$ 458.00
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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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$ 155.00
$ 155.00 - $ 155.00
$ 155.00
$ 124.00
$ 124.00 - $ 124.00
$ 124.00

Foster 310-48, 3/8" ARO Plug x 3/8" Hose ID, 310 Series, Steel

Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310-48 is a steel 3/8" plug from the Foster 310 S...

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$ 155.00
$ 155.00 - $ 155.00
$ 155.00
$ 124.00
$ 124.00 - $ 124.00
$ 124.00
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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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$ 587.00
$ 587.00 - $ 587.00
$ 587.00
$ 470.00
$ 470.00 - $ 470.00
$ 470.00

Foster 310-4704, 3/8" ARO Coupler x 5/16" Hose ID, 310 Series, Automatic, Brass and Steel

Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310-4704 is a brass and steel 3/8" coupler from t...

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$ 587.00
$ 587.00 - $ 587.00
$ 587.00
$ 470.00
$ 470.00 - $ 470.00
$ 470.00
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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 %
$ 573.00
$ 573.00 - $ 573.00
$ 573.00
$ 458.00
$ 458.00 - $ 458.00
$ 458.00

Foster 310-4604, 3/8" ARO Coupler x 1/4" Hose ID, 310 Series, Automatic, Brass and Steel

Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310-4604 is a brass and steel 3/8" coupler from t...

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$ 573.00
$ 573.00 - $ 573.00
$ 573.00
$ 458.00
$ 458.00 - $ 458.00
$ 458.00
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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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$ 548.00
$ 548.00 - $ 548.00
$ 548.00
$ 439.00
$ 439.00 - $ 439.00
$ 439.00

Foster 310-4504, 3/8" ARO Coupler x 1/2" Male NPT, 310 Series, Automatic, Brass and Steel

Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310-4504 is a brass and steel 3/8" coupler from t...

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$ 548.00
$ 548.00 - $ 548.00
$ 548.00
$ 439.00
$ 439.00 - $ 439.00
$ 439.00
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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 %
$ 545.00
$ 545.00 - $ 545.00
$ 545.00
$ 435.00
$ 435.00 - $ 435.00
$ 435.00

Foster 310-4404, 3/8" ARO Coupler x 1/2" Female NPT, 310 Series, Automatic, Brass and Steel

Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310-4404 is a brass and steel 3/8" coupler from t...

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$ 545.00
$ 545.00 - $ 545.00
$ 545.00
$ 435.00
$ 435.00 - $ 435.00
$ 435.00
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 %
$ 527.00
$ 527.00 - $ 527.00
$ 527.00
$ 423.00
$ 423.00 - $ 423.00
$ 423.00

Foster 310-4304, 3/8" ARO Coupler x 3/8" Male NPT, 310 Series, Automatic, Brass and Steel

Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310-4304 is a brass and steel 3/8" coupler from t...

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$ 527.00
$ 527.00 - $ 527.00
$ 527.00
$ 423.00
$ 423.00 - $ 423.00
$ 423.00
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 19% Save %
$ 119.00
$ 119.00 - $ 119.00
$ 119.00
$ 96.00
$ 96.00 - $ 96.00
$ 96.00

Foster 310-43, 3/8" ARO Plug x 3/8" Female NPT, 310 Series, Steel

Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310-43 is a steel 3/8" plug from the Foster 310 S...

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$ 119.00
$ 119.00 - $ 119.00
$ 119.00
$ 96.00
$ 96.00 - $ 96.00
$ 96.00
Save 19% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 520.00
$ 520.00 - $ 520.00
$ 520.00
$ 418.00
$ 418.00 - $ 418.00
$ 418.00

Foster 310-4204, 3/8" ARO Coupler x 3/8" Female NPT, 310 Series, Automatic, Brass and Steel

Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310-4204 is a brass and steel 3/8" coupler from t...

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$ 520.00
$ 520.00 - $ 520.00
$ 520.00
$ 418.00
$ 418.00 - $ 418.00
$ 418.00
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 21% Save %
$ 91.00
$ 91.00 - $ 91.00
$ 91.00
$ 72.00
$ 72.00 - $ 72.00
$ 72.00

Foster 310-42, 3/8" ARO Plug x 3/8" Male NPT, 310 Series, Steel

Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310-42 is a steel 3/8" plug from the Foster 310 S...

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$ 91.00
$ 91.00 - $ 91.00
$ 91.00
$ 72.00
$ 72.00 - $ 72.00
$ 72.00
Save 21% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 512.00
$ 512.00 - $ 512.00
$ 512.00
$ 409.00
$ 409.00 - $ 409.00
$ 409.00

Foster 310-4104, 3/8" ARO Coupler x 1/4" Male NPT, 310 Series, Automatic, Brass and Steel

Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310-4104 is a brass and steel 3/8" coupler from t...

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$ 512.00
$ 512.00 - $ 512.00
$ 512.00
$ 409.00
$ 409.00 - $ 409.00
$ 409.00
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 %
$ 508.00
$ 508.00 - $ 508.00
$ 508.00
$ 406.00
$ 406.00 - $ 406.00
$ 406.00

Foster 310-4004, 3/8" ARO Coupler x 1/4" Female NPT, 310 Series, Automatic, Brass and Steel

Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310-4004 is a brass and steel 3/8" coupler from t...

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$ 508.00
$ 508.00 - $ 508.00
$ 508.00
$ 406.00
$ 406.00 - $ 406.00
$ 406.00
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 %
$ 620.00
$ 620.00 - $ 620.00
$ 620.00
$ 494.00
$ 494.00 - $ 494.00
$ 494.00

Foster 310-1814, 3/8" ARO Coupler x 1/2" Push-On Hose Stem, 310 Series, Automatic, Brass and Steel

Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310-1814 is a brass and steel 3/8" coupler from t...

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$ 620.00
$ 620.00 - $ 620.00
$ 620.00
$ 494.00
$ 494.00 - $ 494.00
$ 494.00
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 %
$ 607.00
$ 607.00 - $ 607.00
$ 607.00
$ 486.00
$ 486.00 - $ 486.00
$ 486.00

Foster 310-1714, 3/8" ARO Coupler x 3/8" Push-On Hose Stem, 310 Series, Automatic, Brass and Steel

Reliable 3/8" air connections that interchange with ARO 310 Series couplers and plugs. The Foster 310-1714 is a brass and steel 3/8" coupler from t...

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$ 607.00
$ 607.00 - $ 607.00
$ 607.00
$ 486.00
$ 486.00 - $ 486.00
$ 486.00
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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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$ 300.00
$ 300.00 - $ 300.00
$ 300.00
$ 240.00
$ 240.00 - $ 240.00
$ 240.00

Foster SHD60, 1/2" Schrader Plug x 1/2" Hose ID, SHD Series, Steel

Fast, one-handed air connections that interchange with Schrader Standard & Heavy Duty couplers. The Foster SHD60 is a steel 1/2" plug from the ...

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$ 300.00
$ 300.00 - $ 300.00
$ 300.00
$ 240.00
$ 240.00 - $ 240.00
$ 240.00
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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 %
$ 218.00
$ 218.00 - $ 218.00
$ 218.00
$ 174.00
$ 174.00 - $ 174.00
$ 174.00

Foster SHD59, 1/2" Schrader Plug x 3/8" Hose ID, SHD Series, Steel

Fast, one-handed air connections that interchange with Schrader Standard & Heavy Duty couplers. The Foster SHD59 is a steel 1/2" plug from the ...

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$ 218.00
$ 218.00 - $ 218.00
$ 218.00
$ 174.00
$ 174.00 - $ 174.00
$ 174.00
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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 %
$ 272.00
$ 272.00 - $ 272.00
$ 272.00
$ 218.00
$ 218.00 - $ 218.00
$ 218.00

Foster SHD53, 1/2" Schrader Plug x 3/8" Female NPT, SHD Series, Steel

Fast, one-handed air connections that interchange with Schrader Standard & Heavy Duty couplers. The Foster SHD53 is a steel 1/2" plug from the ...

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$ 272.00
$ 272.00 - $ 272.00
$ 272.00
$ 218.00
$ 218.00 - $ 218.00
$ 218.00
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 %
$ 192.00
$ 192.00 - $ 192.00
$ 192.00
$ 153.00
$ 153.00 - $ 153.00
$ 153.00

Foster SHD54, 1/2" Schrader Plug x 1/2" Male NPT, SHD Series, Steel

Fast, one-handed air connections that interchange with Schrader Standard & Heavy Duty couplers. The Foster SHD54 is a steel 1/2" plug from the ...

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$ 192.00
$ 192.00 - $ 192.00
$ 192.00
$ 153.00
$ 153.00 - $ 153.00
$ 153.00
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