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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 %
$ 1,123.00
$ 1,123.00 - $ 1,123.00
$ 1,123.00
$ 898.00
$ 898.00 - $ 898.00
$ 898.00

Foster H4B, 1/2" ISO-B Hydraulic Coupler 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 H4B is a brass 1/2" coupler in the FHK Se...

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$ 1,123.00
$ 1,123.00 - $ 1,123.00
$ 1,123.00
$ 898.00
$ 898.00 - $ 898.00
$ 898.00
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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 %
$ 790.00
$ 790.00 - $ 790.00
$ 790.00
$ 632.00
$ 632.00 - $ 632.00
$ 632.00

Foster H3S8, 3/8" ISO-B Hydraulic Coupler 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 H3S8 is a steel 3/8" coupler in the FHK S...

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$ 790.00
$ 790.00 - $ 790.00
$ 790.00
$ 632.00
$ 632.00 - $ 632.00
$ 632.00
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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 %
$ 799.00
$ 799.00 - $ 799.00
$ 799.00
$ 641.00
$ 641.00 - $ 641.00
$ 641.00

Foster H3S-104, 3/8" ISO-B Hydraulic Coupler 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 H3S-104 is a steel 3/8" coupler in the FH...

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$ 799.00
$ 799.00 - $ 799.00
$ 799.00
$ 641.00
$ 641.00 - $ 641.00
$ 641.00
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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 %
$ 764.00
$ 764.00 - $ 764.00
$ 764.00
$ 611.00
$ 611.00 - $ 611.00
$ 611.00

Foster H3S-103, 3/8" ISO-B Hydraulic Coupler 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 H3S-103 is a steel 3/8" coupler in the FH...

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$ 764.00
$ 764.00 - $ 764.00
$ 764.00
$ 611.00
$ 611.00 - $ 611.00
$ 611.00
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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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$ 794.00
$ 794.00 - $ 794.00
$ 794.00
$ 635.00
$ 635.00 - $ 635.00
$ 635.00

Foster H3S-102, 3/8" ISO-B Hydraulic Coupler 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 H3S-102 is a steel 3/8" coupler in the FH...

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$ 794.00
$ 794.00 - $ 794.00
$ 794.00
$ 635.00
$ 635.00 - $ 635.00
$ 635.00
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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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$ 785.00
$ 785.00 - $ 785.00
$ 785.00
$ 628.00
$ 628.00 - $ 628.00
$ 628.00

Foster H3S-101, 3/8" ISO-B Hydraulic Coupler 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 H3S-101 is a steel 3/8" coupler in the FH...

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$ 785.00
$ 785.00 - $ 785.00
$ 785.00
$ 628.00
$ 628.00 - $ 628.00
$ 628.00
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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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$ 1,681.00
$ 1,681.00 - $ 1,681.00
$ 1,681.00
$ 1,344.00
$ 1,344.00 - $ 1,344.00
$ 1,344.00

Foster H3S/S-101, 3/8" ISO-B Hydraulic Coupler 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 H3S/S-101 is a 303 stainless 3/8" coupler...

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$ 1,681.00
$ 1,681.00 - $ 1,681.00
$ 1,681.00
$ 1,344.00
$ 1,344.00 - $ 1,344.00
$ 1,344.00
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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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$ 1,586.00
$ 1,586.00 - $ 1,586.00
$ 1,586.00
$ 1,269.00
$ 1,269.00 - $ 1,269.00
$ 1,269.00

Foster H3S/S, 3/8" ISO-B Hydraulic Coupler 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 H3S/S is a 303 stainless 3/8" coupler in ...

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$ 1,586.00
$ 1,586.00 - $ 1,586.00
$ 1,586.00
$ 1,269.00
$ 1,269.00 - $ 1,269.00
$ 1,269.00
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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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$ 683.00
$ 683.00 - $ 683.00
$ 683.00
$ 547.00
$ 547.00 - $ 547.00
$ 547.00

Foster H3S, 3/8" ISO-B Hydraulic Coupler 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 H3S is a steel 3/8" coupler in the FHK Se...

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$ 683.00
$ 683.00 - $ 683.00
$ 683.00
$ 547.00
$ 547.00 - $ 547.00
$ 547.00
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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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$ 815.00
$ 815.00 - $ 815.00
$ 815.00
$ 651.00
$ 651.00 - $ 651.00
$ 651.00

Foster H3B-104, 3/8" ISO-B Hydraulic Coupler x 3/8" Female NPT, ISO-B Series, Silicone Seal, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H3B-104 is a brass 3/8" coupler in the FH...

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$ 815.00
$ 815.00 - $ 815.00
$ 815.00
$ 651.00
$ 651.00 - $ 651.00
$ 651.00
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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$ 766.00
$ 766.00 - $ 766.00
$ 766.00
$ 613.00
$ 613.00 - $ 613.00
$ 613.00

Foster H3B-103, 3/8" ISO-B Hydraulic Coupler 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 H3B-103 is a brass 3/8" coupler in the FH...

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$ 766.00
$ 766.00 - $ 766.00
$ 766.00
$ 613.00
$ 613.00 - $ 613.00
$ 613.00
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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 %
$ 799.00
$ 799.00 - $ 799.00
$ 799.00
$ 641.00
$ 641.00 - $ 641.00
$ 641.00

Foster H3B-102, 3/8" ISO-B Hydraulic Coupler 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 H3B-102 is a brass 3/8" coupler in the FH...

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$ 799.00
$ 799.00 - $ 799.00
$ 799.00
$ 641.00
$ 641.00 - $ 641.00
$ 641.00
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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$ 787.00
$ 787.00 - $ 787.00
$ 787.00
$ 628.00
$ 628.00 - $ 628.00
$ 628.00

Foster H3B-101, 3/8" ISO-B Hydraulic Coupler 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 H3B-101 is a brass 3/8" coupler in the FH...

View full details
$ 787.00
$ 787.00 - $ 787.00
$ 787.00
$ 628.00
$ 628.00 - $ 628.00
$ 628.00
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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$ 665.00
$ 665.00 - $ 665.00
$ 665.00
$ 533.00
$ 533.00 - $ 533.00
$ 533.00

Foster H3B, 3/8" ISO-B Hydraulic Coupler x 3/8" Female NPT, ISO-B Series, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H3B is a brass 3/8" coupler in the FHK Se...

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$ 665.00
$ 665.00 - $ 665.00
$ 665.00
$ 533.00
$ 533.00 - $ 533.00
$ 533.00
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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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$ 516.00
$ 516.00 - $ 516.00
$ 516.00
$ 412.00
$ 412.00 - $ 412.00
$ 412.00

Foster H2S6, 1/4" ISO-B Hydraulic Coupler x 9/16"-18 SAE, ISO-B Series, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H2S6 is a steel 1/4" coupler in the FHK S...

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$ 516.00
$ 516.00 - $ 516.00
$ 516.00
$ 412.00
$ 412.00 - $ 412.00
$ 412.00
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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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$ 519.00
$ 519.00 - $ 519.00
$ 519.00
$ 416.00
$ 416.00 - $ 416.00
$ 416.00

Foster H2S-104, 1/4" ISO-B Hydraulic Coupler x 1/4" 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 H2S-104 is a steel 1/4" coupler in the FH...

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$ 519.00
$ 519.00 - $ 519.00
$ 519.00
$ 416.00
$ 416.00 - $ 416.00
$ 416.00
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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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$ 507.00
$ 507.00 - $ 507.00
$ 507.00
$ 405.00
$ 405.00 - $ 405.00
$ 405.00

Foster H2S-103, 1/4" ISO-B Hydraulic Coupler x 1/4" 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 H2S-103 is a steel 1/4" coupler in the FH...

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$ 507.00
$ 507.00 - $ 507.00
$ 507.00
$ 405.00
$ 405.00 - $ 405.00
$ 405.00
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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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$ 504.00
$ 504.00 - $ 504.00
$ 504.00
$ 403.00
$ 403.00 - $ 403.00
$ 403.00

Foster H2S-101, 1/4" ISO-B Hydraulic Coupler x 1/4" 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 H2S-101 is a steel 1/4" coupler in the FH...

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$ 504.00
$ 504.00 - $ 504.00
$ 504.00
$ 403.00
$ 403.00 - $ 403.00
$ 403.00
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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$ 1,218.00
$ 1,218.00 - $ 1,218.00
$ 1,218.00
$ 975.00
$ 975.00 - $ 975.00
$ 975.00

Foster H2S/SLV, 1/4" ISO-B Hydraulic Coupler x 1/4" 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 H2S/SLV is a 303 stainless 1/4" coupler i...

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$ 1,218.00
$ 1,218.00 - $ 1,218.00
$ 1,218.00
$ 975.00
$ 975.00 - $ 975.00
$ 975.00
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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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$ 1,315.00
$ 1,315.00 - $ 1,315.00
$ 1,315.00
$ 1,052.00
$ 1,052.00 - $ 1,052.00
$ 1,052.00

Foster H2S/S-104, 1/4" ISO-B Hydraulic Coupler x 1/4" Female NPT, ISO-B Series, Silicone Seal, 303 Stainless Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H2S/S-104 is a 303 stainless 1/4" coupler...

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$ 1,315.00
$ 1,315.00 - $ 1,315.00
$ 1,315.00
$ 1,052.00
$ 1,052.00 - $ 1,052.00
$ 1,052.00
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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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$ 1,290.00
$ 1,290.00 - $ 1,290.00
$ 1,290.00
$ 1,033.00
$ 1,033.00 - $ 1,033.00
$ 1,033.00

Foster H2S/S-103, 1/4" ISO-B Hydraulic Coupler x 1/4" 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 H2S/S-103 is a 303 stainless 1/4" coupler...

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$ 1,290.00
$ 1,290.00 - $ 1,290.00
$ 1,290.00
$ 1,033.00
$ 1,033.00 - $ 1,033.00
$ 1,033.00
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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$ 1,264.00
$ 1,264.00 - $ 1,264.00
$ 1,264.00
$ 1,010.00
$ 1,010.00 - $ 1,010.00
$ 1,010.00

Foster H2S/S-101, 1/4" ISO-B Hydraulic Coupler x 1/4" 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 H2S/S-101 is a 303 stainless 1/4" coupler...

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$ 1,264.00
$ 1,264.00 - $ 1,264.00
$ 1,264.00
$ 1,010.00
$ 1,010.00 - $ 1,010.00
$ 1,010.00
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 %
$ 1,218.00
$ 1,218.00 - $ 1,218.00
$ 1,218.00
$ 975.00
$ 975.00 - $ 975.00
$ 975.00

Foster H2S/S, 1/4" ISO-B Hydraulic Coupler x 1/4" 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 H2S/S is a 303 stainless 1/4" coupler in ...

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$ 1,218.00
$ 1,218.00 - $ 1,218.00
$ 1,218.00
$ 975.00
$ 975.00 - $ 975.00
$ 975.00
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 H2S, 1/4" ISO-B Hydraulic Coupler x 1/4" Female NPT, ISO-B Series, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H2S is a steel 1/4" coupler in the FHK Se...

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$ 433.00
$ 433.00 - $ 433.00
$ 433.00
$ 347.00
$ 347.00 - $ 347.00
$ 347.00
Save 20% Save %

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