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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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    $ 61.79
    $ 61.79 - $ 61.79
    $ 61.79
    $ 49.39
    $ 49.39 - $ 49.39
    $ 49.39

    Foster H4S10, 1/2" ISO-B Hydraulic Coupler x 7/8"-14 SAE, ISO-B Series, Plated Steel

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H4S10 is a plated steel 1/2" coupler from t...

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    $ 61.79
    $ 61.79 - $ 61.79
    $ 61.79
    $ 49.39
    $ 49.39 - $ 49.39
    $ 49.39
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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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    $ 112.39
    $ 112.39 - $ 112.39
    $ 112.39
    $ 89.89
    $ 89.89 - $ 89.89
    $ 89.89

    Foster H6B, 3/4" ISO-B Hydraulic Coupler x 3/4" Female NPT, ISO-B Series, Brass

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H6B is a brass 3/4" coupler from the ISO-B ...

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    $ 112.39
    $ 112.39 - $ 112.39
    $ 112.39
    $ 89.89
    $ 89.89 - $ 89.89
    $ 89.89
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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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    $ 130.79
    $ 130.79 - $ 130.79
    $ 130.79
    $ 104.69
    $ 104.69 - $ 104.69
    $ 104.69

    Foster H6B-101, 3/4" ISO-B Hydraulic Coupler x 3/4" 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 H6B-101 is a brass 3/4" coupler from the IS...

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    $ 130.79
    $ 130.79 - $ 130.79
    $ 130.79
    $ 104.69
    $ 104.69 - $ 104.69
    $ 104.69
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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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    $ 122.79
    $ 122.79 - $ 122.79
    $ 122.79
    $ 98.29
    $ 98.29 - $ 98.29
    $ 98.29

    Foster H6B-103, 3/4" ISO-B Hydraulic Coupler x 3/4" 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 H6B-103 is a brass 3/4" coupler from the IS...

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    $ 122.79
    $ 122.79 - $ 122.79
    $ 122.79
    $ 98.29
    $ 98.29 - $ 98.29
    $ 98.29
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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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    $ 128.69
    $ 128.69 - $ 128.69
    $ 128.69
    $ 102.99
    $ 102.99 - $ 102.99
    $ 102.99

    Foster H6B-104, 3/4" ISO-B Hydraulic Coupler x 3/4" Female NPT, ISO-B Series, Silicone Seal, Brass

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H6B-104 is a brass 3/4" coupler from the IS...

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    $ 128.69
    $ 128.69 - $ 128.69
    $ 128.69
    $ 102.99
    $ 102.99 - $ 102.99
    $ 102.99
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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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    $ 88.09
    $ 88.09 - $ 88.09
    $ 88.09
    $ 70.49
    $ 70.49 - $ 70.49
    $ 70.49

    Foster H6S, 3/4" ISO-B Hydraulic Coupler x 3/4" Female NPT, ISO-B Series, Plated Steel

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H6S is a plated steel 3/4" coupler from the...

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    $ 88.09
    $ 88.09 - $ 88.09
    $ 88.09
    $ 70.49
    $ 70.49 - $ 70.49
    $ 70.49
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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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    $ 99.39
    $ 99.39 - $ 99.39
    $ 99.39
    $ 79.59
    $ 79.59 - $ 79.59
    $ 79.59

    Foster H6S-101, 3/4" ISO-B Hydraulic Coupler x 3/4" 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 H6S-101 is a plated steel 3/4" coupler from...

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    $ 99.39
    $ 99.39 - $ 99.39
    $ 99.39
    $ 79.59
    $ 79.59 - $ 79.59
    $ 79.59
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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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    $ 98.59
    $ 98.59 - $ 98.59
    $ 98.59
    $ 78.89
    $ 78.89 - $ 78.89
    $ 78.89

    Foster H6S-102, 3/4" ISO-B Hydraulic Coupler x 3/4" Female NPT, ISO-B Series, Neoprene Seal, Plated Steel

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H6S-102 is a plated steel 3/4" coupler from...

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    $ 98.59
    $ 98.59 - $ 98.59
    $ 98.59
    $ 78.89
    $ 78.89 - $ 78.89
    $ 78.89
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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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    $ 96.69
    $ 96.69 - $ 96.69
    $ 96.69
    $ 77.39
    $ 77.39 - $ 77.39
    $ 77.39

    Foster H6S-103, 3/4" ISO-B Hydraulic Coupler x 3/4" 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 H6S-103 is a plated steel 3/4" coupler from...

    View full details
    $ 96.69
    $ 96.69 - $ 96.69
    $ 96.69
    $ 77.39
    $ 77.39 - $ 77.39
    $ 77.39
    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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    $ 257.79
    $ 257.79 - $ 257.79
    $ 257.79
    $ 206.19
    $ 206.19 - $ 206.19
    $ 206.19

    Foster H6S/S, 3/4" ISO-B Hydraulic Coupler x 3/4" 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 H6S/S is a 303 stainless steel 3/4" coupler...

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    $ 257.79
    $ 257.79 - $ 257.79
    $ 257.79
    $ 206.19
    $ 206.19 - $ 206.19
    $ 206.19
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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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    $ 273.49
    $ 273.49 - $ 273.49
    $ 273.49
    $ 218.79
    $ 218.79 - $ 218.79
    $ 218.79

    Foster H6S/S-101, 3/4" ISO-B Hydraulic Coupler x 3/4" 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 H6S/S-101 is a 303 stainless steel 3/4" cou...

    View full details
    $ 273.49
    $ 273.49 - $ 273.49
    $ 273.49
    $ 218.79
    $ 218.79 - $ 218.79
    $ 218.79
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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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    $ 270.69
    $ 270.69 - $ 270.69
    $ 270.69
    $ 216.59
    $ 216.59 - $ 216.59
    $ 216.59

    Foster H6S/S-103, 3/4" ISO-B Hydraulic Coupler x 3/4" 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 H6S/S-103 is a 303 stainless steel 3/4" cou...

    View full details
    $ 270.69
    $ 270.69 - $ 270.69
    $ 270.69
    $ 216.59
    $ 216.59 - $ 216.59
    $ 216.59
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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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    $ 262.79
    $ 262.79 - $ 262.79
    $ 262.79
    $ 210.19
    $ 210.19 - $ 210.19
    $ 210.19

    Foster H6S/SLV, 3/4" ISO-B Hydraulic Coupler x 3/4" 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 H6S/SLV is a 303 stainless steel 3/4" coupl...

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    $ 262.79
    $ 262.79 - $ 262.79
    $ 262.79
    $ 210.19
    $ 210.19 - $ 210.19
    $ 210.19
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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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    $ 91.69
    $ 91.69 - $ 91.69
    $ 91.69
    $ 73.39
    $ 73.39 - $ 73.39
    $ 73.39

    Foster H6S12, 3/4" ISO-B Hydraulic Coupler x 1-1/16"-12 SAE, ISO-B Series, Plated Steel

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H6S12 is a plated steel 3/4" coupler from t...

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    $ 91.69
    $ 91.69 - $ 91.69
    $ 91.69
    $ 73.39
    $ 73.39 - $ 73.39
    $ 73.39
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  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    Save 20% Save %
    $ 89.79
    $ 89.79 - $ 89.79
    $ 89.79
    $ 71.79
    $ 71.79 - $ 71.79
    $ 71.79

    Foster H6SLV, 3/4" ISO-B Hydraulic Coupler x 3/4" Female NPT, ISO-B Series, Less Valve, Plated Steel

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H6SLV is a plated steel 3/4" coupler from t...

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    $ 89.79
    $ 89.79 - $ 89.79
    $ 89.79
    $ 71.79
    $ 71.79 - $ 71.79
    $ 71.79
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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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    $ 171.09
    $ 171.09 - $ 171.09
    $ 171.09
    $ 136.89
    $ 136.89 - $ 136.89
    $ 136.89

    Foster H8B, 1" ISO-B Hydraulic Coupler x 1" Female NPT, ISO-B Series, Brass

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H8B is a brass 1" coupler from the ISO-B Se...

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    $ 171.09
    $ 171.09 - $ 171.09
    $ 171.09
    $ 136.89
    $ 136.89 - $ 136.89
    $ 136.89
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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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    $ 189.39
    $ 189.39 - $ 189.39
    $ 189.39
    $ 151.59
    $ 151.59 - $ 151.59
    $ 151.59

    Foster H8B-101, 1" ISO-B Hydraulic Coupler x 1" 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 H8B-101 is a brass 1" coupler from the ISO-...

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    $ 189.39
    $ 189.39 - $ 189.39
    $ 189.39
    $ 151.59
    $ 151.59 - $ 151.59
    $ 151.59
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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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    $ 191.79
    $ 191.79 - $ 191.79
    $ 191.79
    $ 153.39
    $ 153.39 - $ 153.39
    $ 153.39

    Foster H8B-103, 1" ISO-B Hydraulic Coupler x 1" 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 H8B-103 is a brass 1" coupler from the ISO-...

    View full details
    $ 191.79
    $ 191.79 - $ 191.79
    $ 191.79
    $ 153.39
    $ 153.39 - $ 153.39
    $ 153.39
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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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    $ 108.29
    $ 108.29 - $ 108.29
    $ 108.29
    $ 86.59
    $ 86.59 - $ 86.59
    $ 86.59

    Foster H8S, 1" ISO-B Hydraulic Coupler x 1" Female NPT, ISO-B Series, Plated Steel

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H8S is a plated steel 1" coupler from the I...

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    $ 108.29
    $ 108.29 - $ 108.29
    $ 108.29
    $ 86.59
    $ 86.59 - $ 86.59
    $ 86.59
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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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    $ 125.89
    $ 125.89 - $ 125.89
    $ 125.89
    $ 100.79
    $ 100.79 - $ 100.79
    $ 100.79

    Foster H8S-101, 1" ISO-B Hydraulic Coupler x 1" 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 H8S-101 is a plated steel 1" coupler from t...

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    $ 125.89
    $ 125.89 - $ 125.89
    $ 125.89
    $ 100.79
    $ 100.79 - $ 100.79
    $ 100.79
    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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    $ 381.59
    $ 381.59 - $ 381.59
    $ 381.59
    $ 305.29
    $ 305.29 - $ 305.29
    $ 305.29

    Foster H8S/S, 1" ISO-B Hydraulic Coupler x 1" 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 H8S/S is a 303 stainless steel 1" coupler f...

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    $ 381.59
    $ 381.59 - $ 381.59
    $ 381.59
    $ 305.29
    $ 305.29 - $ 305.29
    $ 305.29
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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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    $ 404.59
    $ 404.59 - $ 404.59
    $ 404.59
    $ 323.69
    $ 323.69 - $ 323.69
    $ 323.69

    Foster H8S/S-101, 1" ISO-B Hydraulic Coupler x 1" 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 H8S/S-101 is a 303 stainless steel 1" coupl...

    View full details
    $ 404.59
    $ 404.59 - $ 404.59
    $ 404.59
    $ 323.69
    $ 323.69 - $ 323.69
    $ 323.69
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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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    $ 400.29
    $ 400.29 - $ 400.29
    $ 400.29
    $ 320.19
    $ 320.19 - $ 320.19
    $ 320.19

    Foster H8S/S-103, 1" ISO-B Hydraulic Coupler x 1" 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 H8S/S-103 is a 303 stainless steel 1" coupl...

    View full details
    $ 400.29
    $ 400.29 - $ 400.29
    $ 400.29
    $ 320.19
    $ 320.19 - $ 320.19
    $ 320.19
    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 %
    $ 125.19
    $ 125.19 - $ 125.19
    $ 125.19
    $ 100.19
    $ 100.19 - $ 100.19
    $ 100.19

    Foster H8S16, 1" ISO-B Hydraulic Coupler x 15/16"-12 SAE, ISO-B Series, Plated Steel

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster H8S16 is a plated steel 1" coupler from the...

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    $ 125.19
    $ 125.19 - $ 125.19
    $ 125.19
    $ 100.19
    $ 100.19 - $ 100.19
    $ 100.19
    Save 20% Save %