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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 %
$ 314.99
$ 314.99 - $ 314.99
$ 314.99
$ 251.99
$ 251.99 - $ 251.99
$ 251.99

Foster FF10P-08SS, 3/8" Flat Face Hydraulic Plug x 1/2" Female NPT, FF Plus Series, 316 Stainless Steel

Premium flat-face hydraulic connections that stay clean and lose virtually no fluid. The Foster FF10P-08SS is a 316 stainless steel 3/8" plug from ...

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$ 314.99
$ 314.99 - $ 314.99
$ 314.99
$ 251.99
$ 251.99 - $ 251.99
$ 251.99
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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 %
$ 26.19
$ 26.19 - $ 26.19
$ 26.19
$ 20.99
$ 20.99 - $ 20.99
$ 20.99

Foster FF10P-08, 3/8" Flat Face Hydraulic Plug x 1/2" Female NPT, FF Plus Series, Nickel-Plated Steel

Premium flat-face hydraulic connections that stay clean and lose virtually no fluid. The Foster FF10P-08 is a nickel-plated steel 3/8" plug from th...

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$ 26.19
$ 26.19 - $ 26.19
$ 26.19
$ 20.99
$ 20.99 - $ 20.99
$ 20.99
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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 %
$ 275.59
$ 275.59 - $ 275.59
$ 275.59
$ 220.49
$ 220.49 - $ 220.49
$ 220.49

Foster FF10P-06SS, 3/8" Flat Face Hydraulic Plug x 3/8" Female NPT, FF Plus Series, 316 Stainless Steel

Premium flat-face hydraulic connections that stay clean and lose virtually no fluid. The Foster FF10P-06SS is a 316 stainless steel 3/8" plug from ...

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$ 275.59
$ 275.59 - $ 275.59
$ 275.59
$ 220.49
$ 220.49 - $ 220.49
$ 220.49
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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 %
$ 21.79
$ 21.79 - $ 21.79
$ 21.79
$ 17.39
$ 17.39 - $ 17.39
$ 17.39

Foster FF10P-06, 3/8" Flat Face Hydraulic Plug x 3/8" Female NPT, FF Plus Series, Nickel-Plated Steel

Premium flat-face hydraulic connections that stay clean and lose virtually no fluid. The Foster FF10P-06 is a nickel-plated steel 3/8" plug from th...

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$ 21.79
$ 21.79 - $ 21.79
$ 21.79
$ 17.39
$ 17.39 - $ 17.39
$ 17.39
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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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$ 128.39
$ 128.39 - $ 128.39
$ 128.39
$ 102.79
$ 102.79 - $ 102.79
$ 102.79

Foster FF10CUPP-08, 3/8" Flat Face Connect-Under-Pressure Hydraulic Plug x 1/2" Female NPT, FF Plus Series, Nickel-Plated Steel

Premium flat-face hydraulic connections that stay clean and lose virtually no fluid. The Foster FF10CUPP-08 is a nickel-plated steel 3/8" plug from...

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$ 128.39
$ 128.39 - $ 128.39
$ 128.39
$ 102.79
$ 102.79 - $ 102.79
$ 102.79
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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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$ 128.39
$ 128.39 - $ 128.39
$ 128.39
$ 102.79
$ 102.79 - $ 102.79
$ 102.79

Foster FF10CUPP-06, 3/8" Flat Face Connect-Under-Pressure Hydraulic Plug x 3/8" Female NPT, FF Plus Series, Nickel-Plated Steel

Premium flat-face hydraulic connections that stay clean and lose virtually no fluid. The Foster FF10CUPP-06 is a nickel-plated steel 3/8" plug from...

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$ 128.39
$ 128.39 - $ 128.39
$ 128.39
$ 102.79
$ 102.79 - $ 102.79
$ 102.79
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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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$ 18.79
$ 18.79 - $ 18.79
$ 18.79
$ 15.09
$ 15.09 - $ 15.09
$ 15.09

Foster A12DC-DP, 3/4" ISO-A Dust Cap & Plug Combo, 6600 Series, Steel

Keeps dirt and debris out of disconnected ISO-A hydraulic couplings. The Foster A12DC-DP is a steel dust cap and plug set sized for 3/4" ISO 7241-1...

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$ 18.79
$ 18.79 - $ 18.79
$ 18.79
$ 15.09
$ 15.09 - $ 15.09
$ 15.09
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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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$ 1.99
$ 1.99 - $ 1.99
$ 1.99
$ 1.59
$ 1.59 - $ 1.59
$ 1.59

Foster A16DC-DP, 1" ISO-A Dust Cap & Plug Combo, 6600 Series, Steel

Keeps dirt and debris out of disconnected ISO-A hydraulic couplings. The Foster A16DC-DP is a steel dust cap and plug set sized for 1" ISO 7241-1 S...

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$ 1.99
$ 1.99 - $ 1.99
$ 1.99
$ 1.59
$ 1.59 - $ 1.59
$ 1.59
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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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$ 16.19
$ 16.19 - $ 16.19
$ 16.19
$ 12.99
$ 12.99 - $ 12.99
$ 12.99

Foster A04DC-DP, 1/4" ISO-A Dust Cap & Plug Combo, 6600 Series, Steel

Keeps dirt and debris out of disconnected ISO-A hydraulic couplings. The Foster A04DC-DP is a steel dust cap and plug set sized for 1/4" ISO 7241-1...

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$ 16.19
$ 16.19 - $ 16.19
$ 16.19
$ 12.99
$ 12.99 - $ 12.99
$ 12.99
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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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$ 49.49
$ 49.49 - $ 49.49
$ 49.49
$ 39.59
$ 39.59 - $ 39.59
$ 39.59

Foster K8SLV, 1" ISO-B Hydraulic Plug x 1" Female NPT, ISO-B Series, Less Valve, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K8SLV is a steel 1" plug in the FHK Serie...

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$ 49.49
$ 49.49 - $ 49.49
$ 49.49
$ 39.59
$ 39.59 - $ 39.59
$ 39.59
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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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$ 63.19
$ 63.19 - $ 63.19
$ 63.19
$ 50.49
$ 50.49 - $ 50.49
$ 50.49

Foster K8S16, 1" ISO-B Hydraulic Plug x 15/16"-12 SAE, ISO-B Series, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K8S16 is a steel 1" plug in the FHK Serie...

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$ 63.19
$ 63.19 - $ 63.19
$ 63.19
$ 50.49
$ 50.49 - $ 50.49
$ 50.49
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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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$ 62.49
$ 62.49 - $ 62.49
$ 62.49
$ 49.99
$ 49.99 - $ 49.99
$ 49.99

Foster K8S-101, 1" ISO-B Hydraulic Plug x 1" Female NPT, ISO-B Series, Viton Seal, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K8S-101 is a steel 1" plug in the FHK Ser...

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$ 62.49
$ 62.49 - $ 62.49
$ 62.49
$ 49.99
$ 49.99 - $ 49.99
$ 49.99
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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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$ 196.29
$ 196.29 - $ 196.29
$ 196.29
$ 157.09
$ 157.09 - $ 157.09
$ 157.09

Foster K8S/S-103, 1" ISO-B Hydraulic Plug x 1" Female NPT, ISO-B Series, EPDM Seal, 303 Stainless Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K8S/S-103 is a 303 stainless 1" plug in t...

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$ 196.29
$ 196.29 - $ 196.29
$ 196.29
$ 157.09
$ 157.09 - $ 157.09
$ 157.09
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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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$ 199.99
$ 199.99 - $ 199.99
$ 199.99
$ 159.99
$ 159.99 - $ 159.99
$ 159.99

Foster K8S/S-101, 1" ISO-B Hydraulic Plug x 1" Female NPT, ISO-B Series, Viton Seal, 303 Stainless Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K8S/S-101 is a 303 stainless 1" plug in t...

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$ 199.99
$ 199.99 - $ 199.99
$ 199.99
$ 159.99
$ 159.99 - $ 159.99
$ 159.99
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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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$ 186.99
$ 186.99 - $ 186.99
$ 186.99
$ 149.59
$ 149.59 - $ 149.59
$ 149.59

Foster K8S/S, 1" ISO-B Hydraulic Plug x 1" Female NPT, ISO-B Series, 303 Stainless Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K8S/S is a 303 stainless 1" plug in the F...

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$ 186.99
$ 186.99 - $ 186.99
$ 186.99
$ 149.59
$ 149.59 - $ 149.59
$ 149.59
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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 %
$ 49.49
$ 49.49 - $ 49.49
$ 49.49
$ 39.59
$ 39.59 - $ 39.59
$ 39.59

Foster K8S, 1" ISO-B Hydraulic Plug x 1" Female NPT, ISO-B Series, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K8S is a steel 1" plug in the FHK Series,...

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$ 49.49
$ 49.49 - $ 49.49
$ 49.49
$ 39.59
$ 39.59 - $ 39.59
$ 39.59
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 80.69
$ 80.69 - $ 80.69
$ 80.69
$ 64.49
$ 64.49 - $ 64.49
$ 64.49

Foster K8B-103, 1" ISO-B Hydraulic Plug x 1" Female NPT, ISO-B Series, EPDM Seal, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K8B-103 is a brass 1" plug in the FHK Ser...

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$ 80.69
$ 80.69 - $ 80.69
$ 80.69
$ 64.49
$ 64.49 - $ 64.49
$ 64.49
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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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$ 81.89
$ 81.89 - $ 81.89
$ 81.89
$ 65.49
$ 65.49 - $ 65.49
$ 65.49

Foster K8B-101, 1" ISO-B Hydraulic Plug x 1" Female NPT, ISO-B Series, Viton Seal, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K8B-101 is a brass 1" plug in the FHK Ser...

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$ 81.89
$ 81.89 - $ 81.89
$ 81.89
$ 65.49
$ 65.49 - $ 65.49
$ 65.49
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 %
$ 65.29
$ 65.29 - $ 65.29
$ 65.29
$ 52.19
$ 52.19 - $ 52.19
$ 52.19

Foster K8B, 1" ISO-B Hydraulic Plug x 1" Female NPT, ISO-B Series, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K8B is a brass 1" plug in the FHK Series,...

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$ 65.29
$ 65.29 - $ 65.29
$ 65.29
$ 52.19
$ 52.19 - $ 52.19
$ 52.19
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 33.69
$ 33.69 - $ 33.69
$ 33.69
$ 26.99
$ 26.99 - $ 26.99
$ 26.99

Foster K6SLV, 3/4" ISO-B Hydraulic Plug x 3/4" Female NPT, ISO-B Series, Less Valve, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K6SLV is a steel 3/4" plug in the FHK Ser...

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$ 33.69
$ 33.69 - $ 33.69
$ 33.69
$ 26.99
$ 26.99 - $ 26.99
$ 26.99
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 41.99
$ 41.99 - $ 41.99
$ 41.99
$ 33.59
$ 33.59 - $ 33.59
$ 33.59

Foster K6S12, 3/4" ISO-B Hydraulic Plug x 1-1/16"-12 SAE, ISO-B Series, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K6S12 is a steel 3/4" plug in the FHK Ser...

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$ 41.99
$ 41.99 - $ 41.99
$ 41.99
$ 33.59
$ 33.59 - $ 33.59
$ 33.59
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 %
$ 40.39
$ 40.39 - $ 40.39
$ 40.39
$ 32.29
$ 32.29 - $ 32.29
$ 32.29

Foster K6S-103, 3/4" ISO-B Hydraulic Plug x 3/4" Female NPT, ISO-B Series, EPDM Seal, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K6S-103 is a steel 3/4" plug in the FHK S...

View full details
$ 40.39
$ 40.39 - $ 40.39
$ 40.39
$ 32.29
$ 32.29 - $ 32.29
$ 32.29
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 %
$ 40.29
$ 40.29 - $ 40.29
$ 40.29
$ 32.29
$ 32.29 - $ 32.29
$ 32.29

Foster K6S-102, 3/4" ISO-B Hydraulic Plug x 3/4" Female NPT, ISO-B Series, Neoprene Seal, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K6S-102 is a steel 3/4" plug in the FHK S...

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$ 40.29
$ 40.29 - $ 40.29
$ 40.29
$ 32.29
$ 32.29 - $ 32.29
$ 32.29
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 %
$ 41.09
$ 41.09 - $ 41.09
$ 41.09
$ 32.89
$ 32.89 - $ 32.89
$ 32.89

Foster K6S-101, 3/4" ISO-B Hydraulic Plug x 3/4" Female NPT, ISO-B Series, Viton Seal, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K6S-101 is a steel 3/4" plug in the FHK S...

View full details
$ 41.09
$ 41.09 - $ 41.09
$ 41.09
$ 32.89
$ 32.89 - $ 32.89
$ 32.89
Save 20% Save %

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