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Foster ISO-B Series Couplers

Foster ISO-B (FHK) Series hydraulic quick couplers and plugs, compatible with ISO 7241-1 Series B — the most widely used industrial hydraulic interchange. Two-way shut-off seals both halves at disconnect to prevent fluid loss and air inclusion. Manual sleeve connection at zero pressure. Body sizes 1/8" to 1", in RoHS-plated steel, brass, and 303/316 stainless with Buna-N seals.

  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 375.00
    $ 375.00 - $ 375.00
    $ 375.00
    $ 300.00
    $ 300.00 - $ 300.00
    $ 300.00

    Foster H1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Brass

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H1B is a brass 1/8" coupler from the ISO-B ...

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    $ 375.00
    $ 375.00 - $ 375.00
    $ 375.00
    $ 300.00
    $ 300.00 - $ 300.00
    $ 300.00
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  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 499.00
    $ 499.00 - $ 499.00
    $ 499.00
    $ 399.00
    $ 399.00 - $ 399.00
    $ 399.00

    Foster H1B-101, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Viton Seal, Brass

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H1B-101 is a brass 1/8" coupler from the IS...

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    $ 499.00
    $ 499.00 - $ 499.00
    $ 499.00
    $ 399.00
    $ 399.00 - $ 399.00
    $ 399.00
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  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 495.00
    $ 495.00 - $ 495.00
    $ 495.00
    $ 396.00
    $ 396.00 - $ 396.00
    $ 396.00

    Foster H1B-103, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, EPDM Seal, Brass

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H1B-103 is a brass 1/8" coupler from the IS...

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    $ 495.00
    $ 495.00 - $ 495.00
    $ 495.00
    $ 396.00
    $ 396.00 - $ 396.00
    $ 396.00
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  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 398.00
    $ 398.00 - $ 398.00
    $ 398.00
    $ 318.00
    $ 318.00 - $ 318.00
    $ 318.00

    Foster H1BLV, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Less Valve, Brass

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H1BLV is a brass 1/8" coupler from the ISO-...

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    $ 398.00
    $ 398.00 - $ 398.00
    $ 398.00
    $ 318.00
    $ 318.00 - $ 318.00
    $ 318.00
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  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 403.00
    $ 403.00 - $ 403.00
    $ 403.00
    $ 323.00
    $ 323.00 - $ 323.00
    $ 323.00

    Foster H1S, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Plated Steel

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H1S is a plated steel 1/8" coupler from the...

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    $ 403.00
    $ 403.00 - $ 403.00
    $ 403.00
    $ 323.00
    $ 323.00 - $ 323.00
    $ 323.00
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  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 493.00
    $ 493.00 - $ 493.00
    $ 493.00
    $ 394.00
    $ 394.00 - $ 394.00
    $ 394.00

    Foster H1S-101, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Viton Seal, Plated Steel

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H1S-101 is a plated steel 1/8" coupler from...

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    $ 493.00
    $ 493.00 - $ 493.00
    $ 493.00
    $ 394.00
    $ 394.00 - $ 394.00
    $ 394.00
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  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 1,187.00
    $ 1,187.00 - $ 1,187.00
    $ 1,187.00
    $ 949.00
    $ 949.00 - $ 949.00
    $ 949.00

    Foster H1S/S, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, 303 Stainless Steel

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H1S/S is a 303 stainless steel 1/8" coupler...

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    $ 1,187.00
    $ 1,187.00 - $ 1,187.00
    $ 1,187.00
    $ 949.00
    $ 949.00 - $ 949.00
    $ 949.00
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  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 1,286.00
    $ 1,286.00 - $ 1,286.00
    $ 1,286.00
    $ 1,029.00
    $ 1,029.00 - $ 1,029.00
    $ 1,029.00

    Foster H1S/S-101, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Viton Seal, 303 Stainless Steel

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H1S/S-101 is a 303 stainless steel 1/8" cou...

    View full details
    $ 1,286.00
    $ 1,286.00 - $ 1,286.00
    $ 1,286.00
    $ 1,029.00
    $ 1,029.00 - $ 1,029.00
    $ 1,029.00
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  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 1,293.00
    $ 1,293.00 - $ 1,293.00
    $ 1,293.00
    $ 1,034.00
    $ 1,034.00 - $ 1,034.00
    $ 1,034.00

    Foster H1S/S-104, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Silicone Seal, 303 Stainless Steel

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H1S/S-104 is a 303 stainless steel 1/8" cou...

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    $ 1,293.00
    $ 1,293.00 - $ 1,293.00
    $ 1,293.00
    $ 1,034.00
    $ 1,034.00 - $ 1,034.00
    $ 1,034.00
    Save 20% Save %
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 500.00
    $ 500.00 - $ 500.00
    $ 500.00
    $ 401.00
    $ 401.00 - $ 401.00
    $ 401.00

    Foster H1S4, 1/8" ISO-B Hydraulic Coupler x 7/16"-20 SAE, ISO-B Series, Plated Steel

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H1S4 is a plated steel 1/8" coupler from th...

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    $ 500.00
    $ 500.00 - $ 500.00
    $ 500.00
    $ 401.00
    $ 401.00 - $ 401.00
    $ 401.00
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  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 470.00
    $ 470.00 - $ 470.00
    $ 470.00
    $ 376.00
    $ 376.00 - $ 376.00
    $ 376.00

    Foster H2B, 1/4" ISO-B Hydraulic Coupler x 1/4" Female NPT, ISO-B Series, Brass

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H2B is a brass 1/4" coupler from the ISO-B ...

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    $ 470.00
    $ 470.00 - $ 470.00
    $ 470.00
    $ 376.00
    $ 376.00 - $ 376.00
    $ 376.00
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  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 559.00
    $ 559.00 - $ 559.00
    $ 559.00
    $ 447.00
    $ 447.00 - $ 447.00
    $ 447.00

    Foster H2B-101, 1/4" ISO-B Hydraulic Coupler x 1/4" Female NPT, ISO-B Series, Viton Seal, Brass

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H2B-101 is a brass 1/4" coupler from the IS...

    View full details
    $ 559.00
    $ 559.00 - $ 559.00
    $ 559.00
    $ 447.00
    $ 447.00 - $ 447.00
    $ 447.00
    Save 20% Save %
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 587.00
    $ 587.00 - $ 587.00
    $ 587.00
    $ 470.00
    $ 470.00 - $ 470.00
    $ 470.00

    Foster H2B-102, 1/4" ISO-B Hydraulic Coupler x 1/4" Female NPT, ISO-B Series, Neoprene Seal, Brass

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H2B-102 is a brass 1/4" coupler from the IS...

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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 FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 586.00
    $ 586.00 - $ 586.00
    $ 586.00
    $ 469.00
    $ 469.00 - $ 469.00
    $ 469.00

    Foster H2B-103, 1/4" ISO-B Hydraulic Coupler x 1/4" Female NPT, ISO-B Series, EPDM Seal, Brass

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H2B-103 is a brass 1/4" coupler from the IS...

    View full details
    $ 586.00
    $ 586.00 - $ 586.00
    $ 586.00
    $ 469.00
    $ 469.00 - $ 469.00
    $ 469.00
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  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 479.00
    $ 479.00 - $ 479.00
    $ 479.00
    $ 383.00
    $ 383.00 - $ 383.00
    $ 383.00

    Foster H2BLV, 1/4" ISO-B Hydraulic Coupler x 1/4" Female NPT, ISO-B Series, Less Valve, Brass

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H2BLV is a brass 1/4" coupler from the ISO-...

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    $ 479.00
    $ 479.00 - $ 479.00
    $ 479.00
    $ 383.00
    $ 383.00 - $ 383.00
    $ 383.00
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  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 437.00
    $ 437.00 - $ 437.00
    $ 437.00
    $ 350.00
    $ 350.00 - $ 350.00
    $ 350.00

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

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H2S is a plated steel 1/4" coupler from the...

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    $ 437.00
    $ 437.00 - $ 437.00
    $ 437.00
    $ 350.00
    $ 350.00 - $ 350.00
    $ 350.00
    Save 20% Save %
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 508.00
    $ 508.00 - $ 508.00
    $ 508.00
    $ 406.00
    $ 406.00 - $ 406.00
    $ 406.00

    Foster H2S-101, 1/4" ISO-B Hydraulic Coupler x 1/4" Female NPT, ISO-B Series, Viton Seal, Plated Steel

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H2S-101 is a plated steel 1/4" coupler from...

    View full details
    $ 508.00
    $ 508.00 - $ 508.00
    $ 508.00
    $ 406.00
    $ 406.00 - $ 406.00
    $ 406.00
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  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 511.00
    $ 511.00 - $ 511.00
    $ 511.00
    $ 408.00
    $ 408.00 - $ 408.00
    $ 408.00

    Foster H2S-103, 1/4" ISO-B Hydraulic Coupler x 1/4" Female NPT, ISO-B Series, EPDM Seal, Plated Steel

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H2S-103 is a plated steel 1/4" coupler from...

    View full details
    $ 511.00
    $ 511.00 - $ 511.00
    $ 511.00
    $ 408.00
    $ 408.00 - $ 408.00
    $ 408.00
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  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 523.00
    $ 523.00 - $ 523.00
    $ 523.00
    $ 419.00
    $ 419.00 - $ 419.00
    $ 419.00

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

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H2S-104 is a plated steel 1/4" coupler from...

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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 FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 1,228.00
    $ 1,228.00 - $ 1,228.00
    $ 1,228.00
    $ 983.00
    $ 983.00 - $ 983.00
    $ 983.00

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

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H2S/S is a 303 stainless steel 1/4" coupler...

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    $ 1,228.00
    $ 1,228.00 - $ 1,228.00
    $ 1,228.00
    $ 983.00
    $ 983.00 - $ 983.00
    $ 983.00
    Save 20% Save %
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 1,274.00
    $ 1,274.00 - $ 1,274.00
    $ 1,274.00
    $ 1,018.00
    $ 1,018.00 - $ 1,018.00
    $ 1,018.00

    Foster H2S/S-101, 1/4" ISO-B Hydraulic Coupler x 1/4" Female NPT, ISO-B Series, Viton Seal, 303 Stainless Steel

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H2S/S-101 is a 303 stainless steel 1/4" cou...

    View full details
    $ 1,274.00
    $ 1,274.00 - $ 1,274.00
    $ 1,274.00
    $ 1,018.00
    $ 1,018.00 - $ 1,018.00
    $ 1,018.00
    Save 20% Save %
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 1,300.00
    $ 1,300.00 - $ 1,300.00
    $ 1,300.00
    $ 1,041.00
    $ 1,041.00 - $ 1,041.00
    $ 1,041.00

    Foster H2S/S-103, 1/4" ISO-B Hydraulic Coupler x 1/4" Female NPT, ISO-B Series, EPDM Seal, 303 Stainless Steel

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H2S/S-103 is a 303 stainless steel 1/4" cou...

    View full details
    $ 1,300.00
    $ 1,300.00 - $ 1,300.00
    $ 1,300.00
    $ 1,041.00
    $ 1,041.00 - $ 1,041.00
    $ 1,041.00
    Save 20% Save %
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
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    $ 1,325.00
    $ 1,325.00 - $ 1,325.00
    $ 1,325.00
    $ 1,061.00
    $ 1,061.00 - $ 1,061.00
    $ 1,061.00

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

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H2S/S-104 is a 303 stainless steel 1/4" cou...

    View full details
    $ 1,325.00
    $ 1,325.00 - $ 1,325.00
    $ 1,325.00
    $ 1,061.00
    $ 1,061.00 - $ 1,061.00
    $ 1,061.00
    Save 20% Save %
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    Save 20% Save %
    $ 1,228.00
    $ 1,228.00 - $ 1,228.00
    $ 1,228.00
    $ 983.00
    $ 983.00 - $ 983.00
    $ 983.00

    Foster H2S/SLV, 1/4" ISO-B Hydraulic Coupler x 1/4" Female NPT, ISO-B Series, Less Valve, 303 Stainless Steel

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H2S/SLV is a 303 stainless steel 1/4" coupl...

    View full details
    $ 1,228.00
    $ 1,228.00 - $ 1,228.00
    $ 1,228.00
    $ 983.00
    $ 983.00 - $ 983.00
    $ 983.00
    Save 20% Save %