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Foster 3 Series Couplers

The Foster 3 Series is the 1/4" body industrial interchange, the most popular air coupler size for shop and industrial systems. This collection includes 3 Series couplers and plugs in brass, steel, and stainless with NPT, hose barb, push-on, and reusable terminations, plus automatic, sleeve guard, ball check, and dust cap options. Filter by thread, material, and coupler or plug to match your line.

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    €21,95 - €21,95
    €21,95
    €21,95 - €21,95
    €21,95

    Foster 2803GS, 3 Series, Industrial Coupler, Automatic, 1/8" Female NPT, Brass, Steel

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 2803GS is a Steel 1/4" industrial coupler from the Foster 3 Series — the m...

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    €21,95 - €21,95
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    €21,95 - €21,95
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  • €11,95 - €11,95
    €11,95
    €11,95 - €11,95
    €11,95

    Foster 2903GS, 3 Series, Industrial Coupler, Automatic, 1/8" Male NPT, Brass, Steel

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 2903 is a Brass/Steel 1/4" industrial coupler from the Foster 3 Series — t...

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    €11,95 - €11,95
    €11,95
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  • €15,95 - €15,95
    €15,95
    €15,95 - €15,95
    €15,95

    Foster 3103GS, 3 Series, Industrial Coupler, Automatic, 1/4" Male NPT, Brass, Steel

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 3103GS is a Steel 1/4" industrial coupler from the Foster 3 Series — the m...

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    €15,95 - €15,95
    €15,95
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  • €16,95 - €16,95
    €16,95
    €16,95 - €16,95
    €16,95

    Foster 3203GS, 3 Series, Industrial Coupler, Automatic, 3/8" Female NPT, Brass, Steel

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 3203GS is a Steel 1/4" industrial coupler from the Foster 3 Series — the m...

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    €16,95 - €16,95
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  • €19,95 - €19,95
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    €19,95 - €19,95
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    Foster 3653GS, 3 Series, Industrial Coupler, Automatic, 5/16" Hose Barb, Brass, Steel

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 3653GS is a Steel 1/4" industrial coupler from the Foster 3 Series — the m...

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    €19,95 - €19,95
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    €19,95 - €19,95
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  • €16,95 - €16,95
    €16,95
    €16,95 - €16,95
    €16,95

    Foster 3703GS, 3 Series, Industrial Coupler, Automatic, 3/8" Hose Barb, Brass, Steel

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 3703GS is a Steel 1/4" industrial coupler from the Foster 3 Series — the m...

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    €16,95 - €16,95
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  • €20,95 - €20,95
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    Foster 3303GB, 3 Series, Industrial Coupler, Automatic, 3/8" Male NPT, Brass

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 3303GB is a Brass 1/4" industrial coupler from the Foster 3 Series — the m...

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    €20,95 - €20,95
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    €20,95 - €20,95
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    Foster 3653GB, 3 Series, Industrial Coupler, Automatic, 5/16" Hose Barb, Brass

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 3653GB is a Brass 1/4" industrial coupler from the Foster 3 Series — the m...

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    €20,95 - €20,95
    €20,95
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  • €22,95 - €22,95
    €22,95
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    Foster 1513GB, 3 Series, Industrial Coupler, Automatic, 1/4" Hose Barb (Push-On), Brass

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 1513GB is a Brass 1/4" industrial coupler from the Foster 3 Series — the m...

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    €22,95 - €22,95
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    €11,95
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    Foster 1713GB, 3 Series, Industrial Coupler, Automatic, 3/8" Hose Barb (Push-On), Brass

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 1713 is a Brass/Steel 1/4" industrial coupler from the Foster 3 Series — t...

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    €11,95 - €11,95
    €11,95
    €11,95 - €11,95
    €11,95
  • Foster 3PDC, 1/4" 3 Series Plug Dust Cap, Plastic
    €1,95 - €1,95
    €1,95
    €1,95 - €1,95
    €1,95

    Foster 3PDC, 1/4" 3 Series Plug Dust Cap, Plastic

    In stock

    Protect your 1/4" 3 Series quick plugs when not in use. The Foster 3PDC dust cap keeps dirt, chips, and moisture out of the coupling, helping preve...

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    €1,95 - €1,95
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  • Foster 3PDC, 1/4" 3 Series Plug Dust Cap, Plastic
    €8,95 - €8,95
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    Foster PD13-3, 1/4" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 3 Series, Steel

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster PD13-3 is a Steel 1/4" industrial plug from the Foster 3 Series — the most...

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    €8,95 - €8,95
    €8,95
    €8,95 - €8,95
    €8,95
  • Foster 3PDC, 1/4" 3 Series Plug Dust Cap, Plastic
    €7,95 - €7,95
    €7,95
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    Foster PD11-3, 1/4" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 3/4" OD, 3 Series, Steel

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster PD11-3 is a Steel 1/4" industrial plug from the Foster 3 Series — the most...

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    €7,95 - €7,95
    €7,95
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    €7,95
  • Foster 3PDC, 1/4" 3 Series Plug Dust Cap, Plastic
    €6,95 - €6,95
    €6,95
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    €6,95

    Foster PD9-3, 1/4" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 11/16" OD, 3 Series, Steel

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster PD9-3 is a Steel 1/4" industrial plug from the Foster 3 Series — the most ...

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    €6,95 - €6,95
    €6,95
    €6,95 - €6,95
    €6,95
  • Foster 3PDC, 1/4" 3 Series Plug Dust Cap, Plastic
    €6,95 - €6,95
    €6,95
    €6,95 - €6,95
    €6,95

    Foster PD7-3, 1/4" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 5/8" OD, 3 Series, Steel

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster PD7-3 is a Steel 1/4" industrial plug from the Foster 3 Series — the most ...

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    €6,95 - €6,95
    €6,95
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    €6,95
  • Foster 3PDC, 1/4" 3 Series Plug Dust Cap, Plastic
    €23,95 - €23,95
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    €23,95

    Foster PC7-3, 1/4" Industrial Plug x Reusable Hose Fitting, 5/16" ID x 5/8" OD, 3 Series, Steel

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster PC7-3 is a Steel 1/4" industrial plug from the Foster 3 Series — the most ...

    View full details
    €23,95 - €23,95
    €23,95
    €23,95 - €23,95
    €23,95
  • Foster 3PDC, 1/4" 3 Series Plug Dust Cap, Plastic
    €13,95 - €13,95
    €13,95
    €13,95 - €13,95
    €13,95

    Foster PC5-3, 1/4" Industrial Plug x Reusable Hose Fitting, 5/16" ID x 9/16" OD, 3 Series, Steel

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster PC5-3 is a Steel 1/4" industrial plug from the Foster 3 Series — the most ...

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    €13,95 - €13,95
    €13,95
    €13,95 - €13,95
    €13,95
  • Foster 3PDC, 1/4" 3 Series Plug Dust Cap, Plastic
    €18,95 - €18,95
    €18,95
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    €18,95

    Foster PB7-3S/S, 1/4" Industrial Plug x Reusable Hose Fitting, 1/4" ID x 5/8" OD, 3 Series, 303 Stainless

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster PB7-3S/S is a 303 Stainless 1/4" industrial plug from the Foster 3 Series ...

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    €18,95 - €18,95
    €18,95
    €18,95 - €18,95
    €18,95
  • Foster 3PDC, 1/4" 3 Series Plug Dust Cap, Plastic
    €10,95 - €10,95
    €10,95
    €10,95 - €10,95
    €10,95

    Foster PB7-3B, 1/4" Industrial Plug x Reusable Hose Fitting, 1/4" ID x 5/8" OD, 3 Series, Brass

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster PB7-3B is a Brass 1/4" industrial plug from the Foster 3 Series — the most...

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    €10,95 - €10,95
    €10,95
    €10,95 - €10,95
    €10,95
  • Foster 3PDC, 1/4" 3 Series Plug Dust Cap, Plastic
    €5,95 - €5,95
    €5,95
    €5,95 - €5,95
    €5,95

    Foster PB7-3, 1/4" Industrial Plug x Reusable Hose Fitting, 1/4" ID x 5/8" OD, 3 Series, Steel

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster PB7-3 is a Steel 1/4" industrial plug from the Foster 3 Series — the most ...

    View full details
    €5,95 - €5,95
    €5,95
    €5,95 - €5,95
    €5,95
  • Foster 3PDC, 1/4" 3 Series Plug Dust Cap, Plastic
    €12,95 - €12,95
    €12,95
    €12,95 - €12,95
    €12,95

    Foster PB5-3B, 1/4" Industrial Plug x Reusable Hose Fitting, 1/4" ID x 9/16" OD, 3 Series, Brass

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster PB5-3B is a Brass 1/4" industrial plug from the Foster 3 Series — the most...

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    €12,95 - €12,95
    €12,95
    €12,95 - €12,95
    €12,95
  • Foster 3PDC, 1/4" 3 Series Plug Dust Cap, Plastic
    €6,95 - €6,95
    €6,95
    €6,95 - €6,95
    €6,95

    Foster PB5-3, 1/4" Industrial Plug x Reusable Hose Fitting, 1/4" ID x 9/16" OD, 3 Series, Steel

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster PB5-3 is a Steel 1/4" industrial plug from the Foster 3 Series — the most ...

    View full details
    €6,95 - €6,95
    €6,95
    €6,95 - €6,95
    €6,95
  • Foster 3PDC, 1/4" 3 Series Plug Dust Cap, Plastic
    €44,95 - €44,95
    €44,95
    €44,95 - €44,95
    €44,95

    Foster PB3-3S/S, 1/4" Industrial Plug x Reusable Hose Fitting, 1/4" ID x 1/2" OD, 3 Series, 303 Stainless

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster PB3-3S/S is a 303 Stainless 1/4" industrial plug from the Foster 3 Series ...

    View full details
    €44,95 - €44,95
    €44,95
    €44,95 - €44,95
    €44,95
  • Foster 3PDC, 1/4" 3 Series Plug Dust Cap, Plastic
    €9,95 - €9,95
    €9,95
    €9,95 - €9,95
    €9,95

    Foster PB3-3B, 1/4" Industrial Plug x Reusable Hose Fitting, 1/4" ID x 1/2" OD, 3 Series, Brass

    In stock

    Reliable, leak-free 1/4" connections for air and fluid lines. The Foster PB3-3B is a Brass 1/4" industrial plug from the Foster 3 Series — the most...

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    €9,95 - €9,95
    €9,95
    €9,95 - €9,95
    €9,95