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Hydraulic Quick Couplers

Hydraulic quick couplers join high-pressure fluid lines with a secure, leak-free connection. This collection covers ISO-B, ISO-A, flush face, and specialty hydraulic couplers and plugs in steel, brass, and stainless. Filter by series, body size, thread, and material to match your hydraulic system.

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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 %
$ 546.00
$ 546.00 - $ 546.00
$ 546.00
$ 437.00
$ 437.00 - $ 437.00
$ 437.00

Foster K4S10, 1/2" ISO-B Hydraulic Plug x 7/8"-14 SAE, ISO-B Series, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K4S10 is a steel 1/2" plug in the FHK Ser...

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$ 546.00
$ 546.00 - $ 546.00
$ 546.00
$ 437.00
$ 437.00 - $ 437.00
$ 437.00
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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 %
$ 1,277.00
$ 1,277.00 - $ 1,277.00
$ 1,277.00
$ 1,021.00
$ 1,021.00 - $ 1,021.00
$ 1,021.00

Foster K4S/SLV, 1/2" ISO-B Hydraulic Plug x 1/2" Female NPT, ISO-B Series, Less Valve, 303 Stainless Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K4S/SLV is a 303 stainless 1/2" plug in t...

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$ 1,277.00
$ 1,277.00 - $ 1,277.00
$ 1,277.00
$ 1,021.00
$ 1,021.00 - $ 1,021.00
$ 1,021.00
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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 %
$ 1,372.00
$ 1,372.00 - $ 1,372.00
$ 1,372.00
$ 1,097.00
$ 1,097.00 - $ 1,097.00
$ 1,097.00

Foster K4S/S-103, 1/2" ISO-B Hydraulic Plug x 1/2" 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 K4S/S-103 is a 303 stainless 1/2" plug in...

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$ 1,372.00
$ 1,372.00 - $ 1,372.00
$ 1,372.00
$ 1,097.00
$ 1,097.00 - $ 1,097.00
$ 1,097.00
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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 %
$ 1,354.00
$ 1,354.00 - $ 1,354.00
$ 1,354.00
$ 1,083.00
$ 1,083.00 - $ 1,083.00
$ 1,083.00

Foster K4S/S-101, 1/2" ISO-B Hydraulic Plug x 1/2" 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 K4S/S-101 is a 303 stainless 1/2" plug in...

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$ 1,354.00
$ 1,354.00 - $ 1,354.00
$ 1,354.00
$ 1,083.00
$ 1,083.00 - $ 1,083.00
$ 1,083.00
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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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$ 1,252.00
$ 1,252.00 - $ 1,252.00
$ 1,252.00
$ 1,002.00
$ 1,002.00 - $ 1,002.00
$ 1,002.00

Foster K4S/S, 1/2" ISO-B Hydraulic Plug x 1/2" 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 K4S/S is a 303 stainless 1/2" plug in the...

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$ 1,252.00
$ 1,252.00 - $ 1,252.00
$ 1,252.00
$ 1,002.00
$ 1,002.00 - $ 1,002.00
$ 1,002.00
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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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$ 379.00
$ 379.00 - $ 379.00
$ 379.00
$ 303.00
$ 303.00 - $ 303.00
$ 303.00

Foster K4S, 1/2" ISO-B Hydraulic Plug x 1/2" Female NPT, ISO-B Series, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K4S is a steel 1/2" plug in the FHK Serie...

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$ 379.00
$ 379.00 - $ 379.00
$ 379.00
$ 303.00
$ 303.00 - $ 303.00
$ 303.00
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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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$ 488.00
$ 488.00 - $ 488.00
$ 488.00
$ 391.00
$ 391.00 - $ 391.00
$ 391.00

Foster K4BLV, 1/2" ISO-B Hydraulic Plug x 1/2" Female NPT, ISO-B Series, Less Valve, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K4BLV is a brass 1/2" plug in the FHK Ser...

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$ 488.00
$ 488.00 - $ 488.00
$ 488.00
$ 391.00
$ 391.00 - $ 391.00
$ 391.00
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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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$ 567.00
$ 567.00 - $ 567.00
$ 567.00
$ 454.00
$ 454.00 - $ 454.00
$ 454.00

Foster K4B-103, 1/2" ISO-B Hydraulic Plug x 1/2" 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 K4B-103 is a brass 1/2" plug in the FHK S...

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$ 567.00
$ 567.00 - $ 567.00
$ 567.00
$ 454.00
$ 454.00 - $ 454.00
$ 454.00
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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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$ 588.00
$ 588.00 - $ 588.00
$ 588.00
$ 472.00
$ 472.00 - $ 472.00
$ 472.00

Foster K4B-102, 1/2" ISO-B Hydraulic Plug x 1/2" Female NPT, ISO-B Series, Neoprene Seal, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K4B-102 is a brass 1/2" plug in the FHK S...

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$ 588.00
$ 588.00 - $ 588.00
$ 588.00
$ 472.00
$ 472.00 - $ 472.00
$ 472.00
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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$ 604.00
$ 604.00 - $ 604.00
$ 604.00
$ 484.00
$ 484.00 - $ 484.00
$ 484.00

Foster K4B-101, 1/2" ISO-B Hydraulic Plug x 1/2" 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 K4B-101 is a brass 1/2" plug in the FHK S...

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$ 604.00
$ 604.00 - $ 604.00
$ 604.00
$ 484.00
$ 484.00 - $ 484.00
$ 484.00
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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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$ 470.00
$ 470.00 - $ 470.00
$ 470.00
$ 377.00
$ 377.00 - $ 377.00
$ 377.00

Foster K4B, 1/2" ISO-B Hydraulic Plug x 1/2" Female NPT, ISO-B Series, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K4B is a brass 1/2" plug in the FHK Serie...

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$ 470.00
$ 470.00 - $ 470.00
$ 470.00
$ 377.00
$ 377.00 - $ 377.00
$ 377.00
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 %
$ 293.00
$ 293.00 - $ 293.00
$ 293.00
$ 234.00
$ 234.00 - $ 234.00
$ 234.00

Foster K3SLV, 3/8" ISO-B Hydraulic Plug x 3/8" 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 K3SLV is a steel 3/8" plug in the FHK Ser...

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$ 293.00
$ 293.00 - $ 293.00
$ 293.00
$ 234.00
$ 234.00 - $ 234.00
$ 234.00
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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$ 433.00
$ 433.00 - $ 433.00
$ 433.00
$ 347.00
$ 347.00 - $ 347.00
$ 347.00

Foster K3S8, 3/8" ISO-B Hydraulic Plug x 3/4"-16 SAE, ISO-B Series, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K3S8 is a steel 3/8" plug in the FHK Seri...

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$ 433.00
$ 433.00 - $ 433.00
$ 433.00
$ 347.00
$ 347.00 - $ 347.00
$ 347.00
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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$ 361.00
$ 361.00 - $ 361.00
$ 361.00
$ 289.00
$ 289.00 - $ 289.00
$ 289.00

Foster K3S-104, 3/8" ISO-B Hydraulic Plug x 3/8" Female NPT, ISO-B Series, Silicone Seal, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K3S-104 is a steel 3/8" plug in the FHK S...

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$ 361.00
$ 361.00 - $ 361.00
$ 361.00
$ 289.00
$ 289.00 - $ 289.00
$ 289.00
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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$ 349.00
$ 349.00 - $ 349.00
$ 349.00
$ 278.00
$ 278.00 - $ 278.00
$ 278.00

Foster K3S-103, 3/8" ISO-B Hydraulic Plug x 3/8" 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 K3S-103 is a steel 3/8" plug in the FHK S...

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$ 349.00
$ 349.00 - $ 349.00
$ 349.00
$ 278.00
$ 278.00 - $ 278.00
$ 278.00
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 %
$ 358.00
$ 358.00 - $ 358.00
$ 358.00
$ 285.00
$ 285.00 - $ 285.00
$ 285.00

Foster K3S-102, 3/8" ISO-B Hydraulic Plug x 3/8" 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 K3S-102 is a steel 3/8" plug in the FHK S...

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$ 358.00
$ 358.00 - $ 358.00
$ 358.00
$ 285.00
$ 285.00 - $ 285.00
$ 285.00
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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$ 370.00
$ 370.00 - $ 370.00
$ 370.00
$ 296.00
$ 296.00 - $ 296.00
$ 296.00

Foster K3S-101, 3/8" ISO-B Hydraulic Plug x 3/8" 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 K3S-101 is a steel 3/8" plug in the FHK S...

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$ 370.00
$ 370.00 - $ 370.00
$ 370.00
$ 296.00
$ 296.00 - $ 296.00
$ 296.00
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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$ 791.00
$ 791.00 - $ 791.00
$ 791.00
$ 632.00
$ 632.00 - $ 632.00
$ 632.00

Foster K3S/S-103, 3/8" ISO-B Hydraulic Plug x 3/8" 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 K3S/S-103 is a 303 stainless 3/8" plug in...

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$ 791.00
$ 791.00 - $ 791.00
$ 791.00
$ 632.00
$ 632.00 - $ 632.00
$ 632.00
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 %
$ 794.00
$ 794.00 - $ 794.00
$ 794.00
$ 634.00
$ 634.00 - $ 634.00
$ 634.00

Foster K3S/S-101, 3/8" ISO-B Hydraulic Plug x 3/8" 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 K3S/S-101 is a 303 stainless 3/8" plug in...

View full details
$ 794.00
$ 794.00 - $ 794.00
$ 794.00
$ 634.00
$ 634.00 - $ 634.00
$ 634.00
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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$ 715.00
$ 715.00 - $ 715.00
$ 715.00
$ 572.00
$ 572.00 - $ 572.00
$ 572.00

Foster K3S/S, 3/8" ISO-B Hydraulic Plug x 3/8" 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 K3S/S is a 303 stainless 3/8" plug in the...

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$ 715.00
$ 715.00 - $ 715.00
$ 715.00
$ 572.00
$ 572.00 - $ 572.00
$ 572.00
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 %
$ 293.00
$ 293.00 - $ 293.00
$ 293.00
$ 234.00
$ 234.00 - $ 234.00
$ 234.00

Foster K3S, 3/8" ISO-B Hydraulic Plug x 3/8" Female NPT, ISO-B Series, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K3S is a steel 3/8" plug in the FHK Serie...

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$ 293.00
$ 293.00 - $ 293.00
$ 293.00
$ 234.00
$ 234.00 - $ 234.00
$ 234.00
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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$ 393.00
$ 393.00 - $ 393.00
$ 393.00
$ 315.00
$ 315.00 - $ 315.00
$ 315.00

Foster K3B-103, 3/8" ISO-B Hydraulic Plug x 3/8" 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 K3B-103 is a brass 3/8" plug in the FHK S...

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$ 393.00
$ 393.00 - $ 393.00
$ 393.00
$ 315.00
$ 315.00 - $ 315.00
$ 315.00
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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$ 419.00
$ 419.00 - $ 419.00
$ 419.00
$ 337.00
$ 337.00 - $ 337.00
$ 337.00

Foster K3B-102, 3/8" ISO-B Hydraulic Plug x 3/8" Female NPT, ISO-B Series, Neoprene Seal, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K3B-102 is a brass 3/8" plug in the FHK S...

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$ 419.00
$ 419.00 - $ 419.00
$ 419.00
$ 337.00
$ 337.00 - $ 337.00
$ 337.00
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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$ 430.00
$ 430.00 - $ 430.00
$ 430.00
$ 345.00
$ 345.00 - $ 345.00
$ 345.00

Foster K3B-101, 3/8" ISO-B Hydraulic Plug x 3/8" 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 K3B-101 is a brass 3/8" plug in the FHK S...

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$ 430.00
$ 430.00 - $ 430.00
$ 430.00
$ 345.00
$ 345.00 - $ 345.00
$ 345.00
Save 20% Save %

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