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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 K4S-103, 1/2" ISO-B Hydraulic Plug x 1/2" 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 K4S-103 is a plated steel 1/2" plug from th...

    View full details
    €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
    €50,95 - €50,95
    €50,95
    €50,95 - €50,95
    €50,95

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

    View full details
    €50,95 - €50,95
    €50,95
    €50,95 - €50,95
    €50,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €54,95 - €54,95
    €54,95
    €54,95 - €54,95
    €54,95

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

    View full details
    €54,95 - €54,95
    €54,95
    €54,95 - €54,95
    €54,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €55,95 - €55,95
    €55,95
    €55,95 - €55,95
    €55,95

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

    View full details
    €55,95 - €55,95
    €55,95
    €55,95 - €55,95
    €55,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €51,95 - €51,95
    €51,95
    €51,95 - €51,95
    €51,95

    Foster K4S/SLV, 1/2" ISO-B Hydraulic Plug x 1/2" 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 K4S/SLV is a 303 stainless steel 1/2" plug ...

    View full details
    €51,95 - €51,95
    €51,95
    €51,95 - €51,95
    €51,95
  • 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 K4S10, 1/2" ISO-B Hydraulic Plug 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 K4S10 is a plated steel 1/2" plug from the ...

    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
    €15,95 - €15,95
    €15,95
    €15,95 - €15,95
    €15,95

    Foster K4SLV, 1/2" ISO-B Hydraulic Plug x 1/2" 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 K4SLV is a plated steel 1/2" plug from the ...

    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
    €28,95 - €28,95
    €28,95
    €28,95 - €28,95
    €28,95

    Foster K6B, 3/4" ISO-B Hydraulic Plug 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 K6B is a brass 3/4" plug from the ISO-B Ser...

    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
    €37,95 - €37,95
    €37,95
    €37,95 - €37,95
    €37,95

    Foster K6B-101, 3/4" ISO-B Hydraulic Plug 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 K6B-101 is a brass 3/4" plug from the ISO-B...

    View full details
    €37,95 - €37,95
    €37,95
    €37,95 - €37,95
    €37,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €35,95 - €35,95
    €35,95
    €35,95 - €35,95
    €35,95

    Foster K6B-103, 3/4" ISO-B Hydraulic Plug 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 K6B-103 is a brass 3/4" plug from the ISO-B...

    View full details
    €35,95 - €35,95
    €35,95
    €35,95 - €35,95
    €35,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €26,95 - €26,95
    €26,95
    €26,95 - €26,95
    €26,95

    Foster K6S, 3/4" ISO-B Hydraulic Plug 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 K6S is a plated steel 3/4" plug from the IS...

    View full details
    €26,95 - €26,95
    €26,95
    €26,95 - €26,95
    €26,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €29,95 - €29,95
    €29,95
    €29,95 - €29,95
    €29,95

    Foster K6S-101, 3/4" ISO-B Hydraulic Plug 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 K6S-101 is a plated steel 3/4" plug from th...

    View full details
    €29,95 - €29,95
    €29,95
    €29,95 - €29,95
    €29,95
  • 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 K6S-102, 3/4" ISO-B Hydraulic Plug 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 K6S-102 is a plated steel 3/4" plug from th...

    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
    €28,95 - €28,95
    €28,95
    €28,95 - €28,95
    €28,95

    Foster K6S-103, 3/4" ISO-B Hydraulic Plug 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 K6S-103 is a plated steel 3/4" plug from th...

    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
    €76,95 - €76,95
    €76,95
    €76,95 - €76,95
    €76,95

    Foster K6S/S, 3/4" ISO-B Hydraulic Plug 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 K6S/S is a 303 stainless steel 3/4" plug fr...

    View full details
    €76,95 - €76,95
    €76,95
    €76,95 - €76,95
    €76,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €81,95 - €81,95
    €81,95
    €81,95 - €81,95
    €81,95

    Foster K6S/S-101, 3/4" ISO-B Hydraulic Plug 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 K6S/S-101 is a 303 stainless steel 3/4" plu...

    View full details
    €81,95 - €81,95
    €81,95
    €81,95 - €81,95
    €81,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €82,95 - €82,95
    €82,95
    €82,95 - €82,95
    €82,95

    Foster K6S/S-103, 3/4" ISO-B Hydraulic Plug 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 K6S/S-103 is a 303 stainless steel 3/4" plu...

    View full details
    €82,95 - €82,95
    €82,95
    €82,95 - €82,95
    €82,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €77,95 - €77,95
    €77,95
    €77,95 - €77,95
    €77,95

    Foster K6S/SLV, 3/4" ISO-B Hydraulic Plug 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 K6S/SLV is a 303 stainless steel 3/4" plug ...

    View full details
    €77,95 - €77,95
    €77,95
    €77,95 - €77,95
    €77,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €29,95 - €29,95
    €29,95
    €29,95 - €29,95
    €29,95

    Foster K6S12, 3/4" ISO-B Hydraulic Plug 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 K6S12 is a plated steel 3/4" plug from the ...

    View full details
    €29,95 - €29,95
    €29,95
    €29,95 - €29,95
    €29,95
  • 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 K6SLV, 3/4" ISO-B Hydraulic Plug 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 K6SLV is a plated steel 3/4" plug from the ...

    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
    €46,95 - €46,95
    €46,95
    €46,95 - €46,95
    €46,95

    Foster K8B, 1" ISO-B Hydraulic Plug 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 K8B is a brass 1" plug from the ISO-B Serie...

    View full details
    €46,95 - €46,95
    €46,95
    €46,95 - €46,95
    €46,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €58,95 - €58,95
    €58,95
    €58,95 - €58,95
    €58,95

    Foster K8B-101, 1" ISO-B Hydraulic Plug 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 K8B-101 is a brass 1" plug from the ISO-B S...

    View full details
    €58,95 - €58,95
    €58,95
    €58,95 - €58,95
    €58,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €57,95 - €57,95
    €57,95
    €57,95 - €57,95
    €57,95

    Foster K8B-103, 1" ISO-B Hydraulic Plug 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 K8B-103 is a brass 1" plug from the ISO-B S...

    View full details
    €57,95 - €57,95
    €57,95
    €57,95 - €57,95
    €57,95
  • Foster FHS4M4B-103, 1/2" Snap-Tite H Interchange Coupler x 1/2" Male NPT, FH Series, EPDM Seal, Brass
    €35,95 - €35,95
    €35,95
    €35,95 - €35,95
    €35,95

    Foster K8S, 1" ISO-B Hydraulic Plug 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 K8S is a plated steel 1" plug from the ISO-...

    View full details
    €35,95 - €35,95
    €35,95
    €35,95 - €35,95
    €35,95