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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
    €18,95 - €18,95
    €18,95
    €18,95 - €18,95
    €18,95

    Foster K2S/SLV, 1/4" ISO-B Hydraulic Plug 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 K2S/SLV is a 303 stainless steel 1/4" plug ...

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    €18,95 - €18,95
    €18,95
    €18,95 - €18,95
    €18,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €11,95 - €11,95
    €11,95
    €11,95 - €11,95
    €11,95

    Foster K2S6, 1/4" ISO-B Hydraulic Plug x 9/16"-18 SAE, ISO-B Series, Plated Steel

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster K2S6 is a plated steel 1/4" plug from the I...

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    €11,95 - €11,95
    €11,95
    €11,95 - €11,95
    €11,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €8,95 - €8,95
    €8,95
    €8,95 - €8,95
    €8,95

    Foster K2SLV, 1/4" ISO-B Hydraulic Plug x 1/4" 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 K2SLV is a plated steel 1/4" plug from the ...

    View full details
    €8,95 - €8,95
    €8,95
    €8,95 - €8,95
    €8,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €13,95 - €13,95
    €13,95
    €13,95 - €13,95
    €13,95

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

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster K3B is a brass 3/8" plug from the ISO-B Ser...

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    €13,95 - €13,95
    €13,95
    €13,95 - €13,95
    €13,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €17,95 - €17,95
    €17,95
    €17,95 - €17,95
    €17,95

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

    View full details
    €17,95 - €17,95
    €17,95
    €17,95 - €17,95
    €17,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €17,95 - €17,95
    €17,95
    €17,95 - €17,95
    €17,95

    Foster K3B-102, 3/8" ISO-B Hydraulic Plug x 3/8" 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 K3B-102 is a brass 3/8" plug from the ISO-B...

    View full details
    €17,95 - €17,95
    €17,95
    €17,95 - €17,95
    €17,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €15,95 - €15,95
    €15,95
    €15,95 - €15,95
    €15,95

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

    View full details
    €15,95 - €15,95
    €15,95
    €15,95 - €15,95
    €15,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €11,95 - €11,95
    €11,95
    €11,95 - €11,95
    €11,95

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

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster K3S is a plated steel 3/8" plug from the IS...

    View full details
    €11,95 - €11,95
    €11,95
    €11,95 - €11,95
    €11,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €14,95 - €14,95
    €14,95
    €14,95 - €14,95
    €14,95

    Foster K3S-101, 3/8" ISO-B Hydraulic Plug x 3/8" 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 K3S-101 is a plated steel 3/8" plug from th...

    View full details
    €14,95 - €14,95
    €14,95
    €14,95 - €14,95
    €14,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €14,95 - €14,95
    €14,95
    €14,95 - €14,95
    €14,95

    Foster K3S-102, 3/8" ISO-B Hydraulic Plug x 3/8" 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 K3S-102 is a plated steel 3/8" plug from th...

    View full details
    €14,95 - €14,95
    €14,95
    €14,95 - €14,95
    €14,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €14,95 - €14,95
    €14,95
    €14,95 - €14,95
    €14,95

    Foster K3S-103, 3/8" ISO-B Hydraulic Plug x 3/8" 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 K3S-103 is a plated steel 3/8" plug from th...

    View full details
    €14,95 - €14,95
    €14,95
    €14,95 - €14,95
    €14,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €14,95 - €14,95
    €14,95
    €14,95 - €14,95
    €14,95

    Foster K3S-104, 3/8" ISO-B Hydraulic Plug x 3/8" 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 K3S-104 is a plated steel 3/8" plug from th...

    View full details
    €14,95 - €14,95
    €14,95
    €14,95 - €14,95
    €14,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €28,95 - €28,95
    €28,95
    €28,95 - €28,95
    €28,95

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

    View full details
    €28,95 - €28,95
    €28,95
    €28,95 - €28,95
    €28,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €32,95 - €32,95
    €32,95
    €32,95 - €32,95
    €32,95

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

    View full details
    €32,95 - €32,95
    €32,95
    €32,95 - €32,95
    €32,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €31,95 - €31,95
    €31,95
    €31,95 - €31,95
    €31,95

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

    View full details
    €31,95 - €31,95
    €31,95
    €31,95 - €31,95
    €31,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €17,95 - €17,95
    €17,95
    €17,95 - €17,95
    €17,95

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

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster K3S8 is a plated steel 3/8" plug from the I...

    View full details
    €17,95 - €17,95
    €17,95
    €17,95 - €17,95
    €17,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €11,95 - €11,95
    €11,95
    €11,95 - €11,95
    €11,95

    Foster K3SLV, 3/8" ISO-B Hydraulic Plug x 3/8" 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 K3SLV is a plated steel 3/8" plug from the ...

    View full details
    €11,95 - €11,95
    €11,95
    €11,95 - €11,95
    €11,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €19,95 - €19,95
    €19,95
    €19,95 - €19,95
    €19,95

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

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster K4B is a brass 1/2" plug from the ISO-B Ser...

    View full details
    €19,95 - €19,95
    €19,95
    €19,95 - €19,95
    €19,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €24,95 - €24,95
    €24,95
    €24,95 - €24,95
    €24,95

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

    View full details
    €24,95 - €24,95
    €24,95
    €24,95 - €24,95
    €24,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €23,95 - €23,95
    €23,95
    €23,95 - €23,95
    €23,95

    Foster K4B-102, 1/2" ISO-B Hydraulic Plug x 1/2" 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 K4B-102 is a brass 1/2" plug from the ISO-B...

    View full details
    €23,95 - €23,95
    €23,95
    €23,95 - €23,95
    €23,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €22,95 - €22,95
    €22,95
    €22,95 - €22,95
    €22,95

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

    View full details
    €22,95 - €22,95
    €22,95
    €22,95 - €22,95
    €22,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €19,95 - €19,95
    €19,95
    €19,95 - €19,95
    €19,95

    Foster K4BLV, 1/2" ISO-B Hydraulic Plug x 1/2" 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 K4BLV is a brass 1/2" plug from the ISO-B S...

    View full details
    €19,95 - €19,95
    €19,95
    €19,95 - €19,95
    €19,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €15,95 - €15,95
    €15,95
    €15,95 - €15,95
    €15,95

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

    In stock

    Reliable, leak-free hydraulic connections built to the most widely used industrial standard. The Foster K4S is a plated steel 1/2" plug from the IS...

    View full details
    €15,95 - €15,95
    €15,95
    €15,95 - €15,95
    €15,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €19,95 - €19,95
    €19,95
    €19,95 - €19,95
    €19,95

    Foster K4S-101, 1/2" ISO-B Hydraulic Plug x 1/2" 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 K4S-101 is a plated steel 1/2" plug from th...

    View full details
    €19,95 - €19,95
    €19,95
    €19,95 - €19,95
    €19,95