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Breco 4 Series Couplers

The Breco 4 Series is the 3/8" body industrial interchange, a common air coupler size for shop and industrial systems. This collection includes Breco 4 Series couplers and plugs in brass, steel, and brass with steel sleeve, with NPT, hose barb, and push-on terminations. Filter by thread, material, and coupler or plug to find your part.

  • Original price $ 29.19
    Original price $ 29.19 - Original price $ 29.19
    Original price $ 29.19
    Current price $ 23.29
    $ 23.29 - $ 23.29
    Current price $ 23.29

    Breco B-3BF2-B, 3/8" Industrial Coupler x 1/4" Female NPT, 4 Series, Automatic, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3BF2-B is a Brass 3/8" industrial coupler from the Breco 4 Series — a hig...

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    Original price $ 29.19
    Original price $ 29.19 - Original price $ 29.19
    Original price $ 29.19
    Current price $ 23.29
    $ 23.29 - $ 23.29
    Current price $ 23.29
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  • Original price $ 32.89
    Original price $ 32.89 - Original price $ 32.89
    Original price $ 32.89
    Current price $ 26.29
    $ 26.29 - $ 26.29
    Current price $ 26.29

    Breco B-3BF2-B-SL, 3/8" Industrial Coupler x 1/4" Female NPT, 4 Series, Automatic Sleeve Lock, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3BF2-B-SL is a Brass 3/8" industrial coupler from the Breco 4 Series — a ...

    View full details
    Original price $ 32.89
    Original price $ 32.89 - Original price $ 32.89
    Original price $ 32.89
    Current price $ 26.29
    $ 26.29 - $ 26.29
    Current price $ 26.29
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  • Original price $ 29.39
    Original price $ 29.39 - Original price $ 29.39
    Original price $ 29.39
    Current price $ 23.49
    $ 23.49 - $ 23.49
    Current price $ 23.49

    Breco B-3BF3-B, 3/8" Industrial Coupler x 3/8" Female NPT, 4 Series, Automatic, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3BF3-B is a Brass 3/8" industrial coupler from the Breco 4 Series — a hig...

    View full details
    Original price $ 29.39
    Original price $ 29.39 - Original price $ 29.39
    Original price $ 29.39
    Current price $ 23.49
    $ 23.49 - $ 23.49
    Current price $ 23.49
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  • Original price $ 32.79
    Original price $ 32.79 - Original price $ 32.79
    Original price $ 32.79
    Current price $ 26.29
    $ 26.29 - $ 26.29
    Current price $ 26.29

    Breco B-3BF3-B-SL, 3/8" Industrial Coupler x 3/8" Female NPT, 4 Series, Automatic Sleeve Lock, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3BF3-B-SL is a Brass 3/8" industrial coupler from the Breco 4 Series — a ...

    View full details
    Original price $ 32.79
    Original price $ 32.79 - Original price $ 32.79
    Original price $ 32.79
    Current price $ 26.29
    $ 26.29 - $ 26.29
    Current price $ 26.29
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  • Original price $ 30.09
    Original price $ 30.09 - Original price $ 30.09
    Original price $ 30.09
    Current price $ 24.09
    $ 24.09 - $ 24.09
    Current price $ 24.09

    Breco B-3BF4-B, 3/8" Industrial Coupler x 1/2" Female NPT, 4 Series, Automatic, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3BF4-B is a Brass 3/8" industrial coupler from the Breco 4 Series — a hig...

    View full details
    Original price $ 30.09
    Original price $ 30.09 - Original price $ 30.09
    Original price $ 30.09
    Current price $ 24.09
    $ 24.09 - $ 24.09
    Current price $ 24.09
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  • Original price $ 33.79
    Original price $ 33.79 - Original price $ 33.79
    Original price $ 33.79
    Current price $ 27.09
    $ 27.09 - $ 27.09
    Current price $ 27.09

    Breco B-3BF4-B-SL, 3/8" Industrial Coupler x 1/2" Female NPT, 4 Series, Automatic Sleeve Lock, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3BF4-B-SL is a Brass 3/8" industrial coupler from the Breco 4 Series — a ...

    View full details
    Original price $ 33.79
    Original price $ 33.79 - Original price $ 33.79
    Original price $ 33.79
    Current price $ 27.09
    $ 27.09 - $ 27.09
    Current price $ 27.09
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  • Original price $ 36.49
    Original price $ 36.49 - Original price $ 36.49
    Original price $ 36.49
    Current price $ 29.19
    $ 29.19 - $ 29.19
    Current price $ 29.19

    Breco B-3BH3-B-SL, 3/8" Industrial Coupler x Reusable Hose Fitting, 3/8" ID x 5/8" OD, 4 Series, Automatic Sleeve Lock, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3BH3-B-SL is a Brass 3/8" industrial coupler from the Breco 4 Series — a ...

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    Original price $ 36.49
    Original price $ 36.49 - Original price $ 36.49
    Original price $ 36.49
    Current price $ 29.19
    $ 29.19 - $ 29.19
    Current price $ 29.19
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  • Original price $ 29.19
    Original price $ 29.19 - Original price $ 29.19
    Original price $ 29.19
    Current price $ 23.29
    $ 23.29 - $ 23.29
    Current price $ 23.29

    Breco B-3BM2-B, 3/8" Industrial Coupler x 1/4" Male NPT, 4 Series, Automatic, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3BM2-B is a Brass 3/8" industrial coupler from the Breco 4 Series — a hig...

    View full details
    Original price $ 29.19
    Original price $ 29.19 - Original price $ 29.19
    Original price $ 29.19
    Current price $ 23.29
    $ 23.29 - $ 23.29
    Current price $ 23.29
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  • Original price $ 32.89
    Original price $ 32.89 - Original price $ 32.89
    Original price $ 32.89
    Current price $ 26.29
    $ 26.29 - $ 26.29
    Current price $ 26.29

    Breco B-3BM2-B-SL, 3/8" Industrial Coupler x 1/4" Male NPT, 4 Series, Automatic Sleeve Lock, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3BM2-B-SL is a Brass 3/8" industrial coupler from the Breco 4 Series — a ...

    View full details
    Original price $ 32.89
    Original price $ 32.89 - Original price $ 32.89
    Original price $ 32.89
    Current price $ 26.29
    $ 26.29 - $ 26.29
    Current price $ 26.29
    Save 20% Save %
  • Original price $ 29.39
    Original price $ 29.39 - Original price $ 29.39
    Original price $ 29.39
    Current price $ 23.49
    $ 23.49 - $ 23.49
    Current price $ 23.49

    Breco B-3BM3-B, 3/8" Industrial Coupler x 3/8" Male NPT, 4 Series, Automatic, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3BM3-B is a Brass 3/8" industrial coupler from the Breco 4 Series — a hig...

    View full details
    Original price $ 29.39
    Original price $ 29.39 - Original price $ 29.39
    Original price $ 29.39
    Current price $ 23.49
    $ 23.49 - $ 23.49
    Current price $ 23.49
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  • Original price $ 33.39
    Original price $ 33.39 - Original price $ 33.39
    Original price $ 33.39
    Current price $ 26.79
    $ 26.79 - $ 26.79
    Current price $ 26.79

    Breco B-3BM3-B-SL, 3/8" Industrial Coupler x 3/8" Male NPT, 4 Series, Automatic Sleeve Lock, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3BM3-B-SL is a Brass 3/8" industrial coupler from the Breco 4 Series — a ...

    View full details
    Original price $ 33.39
    Original price $ 33.39 - Original price $ 33.39
    Original price $ 33.39
    Current price $ 26.79
    $ 26.79 - $ 26.79
    Current price $ 26.79
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  • Original price $ 29.69
    Original price $ 29.69 - Original price $ 29.69
    Original price $ 29.69
    Current price $ 23.79
    $ 23.79 - $ 23.79
    Current price $ 23.79

    Breco B-3BM4-B, 3/8" Industrial Coupler x 1/2" Male NPT, 4 Series, Automatic, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3BM4-B is a Brass 3/8" industrial coupler from the Breco 4 Series — a hig...

    View full details
    Original price $ 29.69
    Original price $ 29.69 - Original price $ 29.69
    Original price $ 29.69
    Current price $ 23.79
    $ 23.79 - $ 23.79
    Current price $ 23.79
    Save 20% Save %
  • Original price $ 33.79
    Original price $ 33.79 - Original price $ 33.79
    Original price $ 33.79
    Current price $ 27.09
    $ 27.09 - $ 27.09
    Current price $ 27.09

    Breco B-3BM4-B-SL, 3/8" Industrial Coupler x 1/2" Male NPT, 4 Series, Automatic Sleeve Lock, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3BM4-B-SL is a Brass 3/8" industrial coupler from the Breco 4 Series — a ...

    View full details
    Original price $ 33.79
    Original price $ 33.79 - Original price $ 33.79
    Original price $ 33.79
    Current price $ 27.09
    $ 27.09 - $ 27.09
    Current price $ 27.09
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  • Original price $ 33.19
    Original price $ 33.19 - Original price $ 33.19
    Original price $ 33.19
    Current price $ 26.59
    $ 26.59 - $ 26.59
    Current price $ 26.59

    Breco B-3BPS3-B, 3/8" Industrial Coupler x 3/8" Push-On Hose Stem, 4 Series, Automatic, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3BPS3-B is a Brass 3/8" industrial coupler from the Breco 4 Series — a hi...

    View full details
    Original price $ 33.19
    Original price $ 33.19 - Original price $ 33.19
    Original price $ 33.19
    Current price $ 26.59
    $ 26.59 - $ 26.59
    Current price $ 26.59
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  • Original price $ 30.89
    Original price $ 30.89 - Original price $ 30.89
    Original price $ 30.89
    Current price $ 24.69
    $ 24.69 - $ 24.69
    Current price $ 24.69

    Breco B-3BS2-B, 3/8" Industrial Coupler x 1/4" Hose ID, 4 Series, Automatic, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3BS2-B is a Brass 3/8" industrial coupler from the Breco 4 Series — a hig...

    View full details
    Original price $ 30.89
    Original price $ 30.89 - Original price $ 30.89
    Original price $ 30.89
    Current price $ 24.69
    $ 24.69 - $ 24.69
    Current price $ 24.69
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  • Original price $ 31.29
    Original price $ 31.29 - Original price $ 31.29
    Original price $ 31.29
    Current price $ 24.99
    $ 24.99 - $ 24.99
    Current price $ 24.99

    Breco B-3BS3-B, 3/8" Industrial Coupler x 3/8" Hose ID, 4 Series, Automatic, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3BS3-B is a Brass 3/8" industrial coupler from the Breco 4 Series — a hig...

    View full details
    Original price $ 31.29
    Original price $ 31.29 - Original price $ 31.29
    Original price $ 31.29
    Current price $ 24.99
    $ 24.99 - $ 24.99
    Current price $ 24.99
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  • Original price $ 35.19
    Original price $ 35.19 - Original price $ 35.19
    Original price $ 35.19
    Current price $ 28.09
    $ 28.09 - $ 28.09
    Current price $ 28.09

    Breco B-3BS3-B-SL, 3/8" Industrial Coupler x 3/8" Hose ID, 4 Series, Automatic Sleeve Lock, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3BS3-B-SL is a Brass 3/8" industrial coupler from the Breco 4 Series — a ...

    View full details
    Original price $ 35.19
    Original price $ 35.19 - Original price $ 35.19
    Original price $ 35.19
    Current price $ 28.09
    $ 28.09 - $ 28.09
    Current price $ 28.09
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  • Original price $ 30.49
    Original price $ 30.49 - Original price $ 30.49
    Original price $ 30.49
    Current price $ 24.39
    $ 24.39 - $ 24.39
    Current price $ 24.39

    Breco B-3BS4-B, 3/8" Industrial Coupler x 1/2" Hose ID, 4 Series, Automatic, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3BS4-B is a Brass 3/8" industrial coupler from the Breco 4 Series — a hig...

    View full details
    Original price $ 30.49
    Original price $ 30.49 - Original price $ 30.49
    Original price $ 30.49
    Current price $ 24.39
    $ 24.39 - $ 24.39
    Current price $ 24.39
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  • Original price $ 35.59
    Original price $ 35.59 - Original price $ 35.59
    Original price $ 35.59
    Current price $ 28.39
    $ 28.39 - $ 28.39
    Current price $ 28.39

    Breco B-3BS4-B-SL, 3/8" Industrial Coupler x 1/2" Hose ID, 4 Series, Automatic Sleeve Lock, Brass

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3BS4-B-SL is a Brass 3/8" industrial coupler from the Breco 4 Series — a ...

    View full details
    Original price $ 35.59
    Original price $ 35.59 - Original price $ 35.59
    Original price $ 35.59
    Current price $ 28.39
    $ 28.39 - $ 28.39
    Current price $ 28.39
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  • Original price $ 84.69
    Original price $ 84.69 - Original price $ 84.69
    Original price $ 84.69
    Current price $ 67.79
    $ 67.79 - $ 67.79
    Current price $ 67.79

    Breco B-3CF3-B, 3/8" Industrial Coupler x 3/8" Female NPT, 4 Series, Sleeve Guard, Brass w/Brass Sleeve

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3CF3-B is a Brass w/Brass Sleeve 3/8" industrial coupler from the Breco 4...

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    Original price $ 84.69
    Original price $ 84.69 - Original price $ 84.69
    Original price $ 84.69
    Current price $ 67.79
    $ 67.79 - $ 67.79
    Current price $ 67.79
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  • Original price $ 22.39
    Original price $ 22.39 - Original price $ 22.39
    Original price $ 22.39
    Current price $ 17.89
    $ 17.89 - $ 17.89
    Current price $ 17.89

    Breco B-3CF3-S, 3/8" Industrial Coupler x 3/8" Female NPT, 4 Series, Sleeve Guard, Steel

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3CF3-S is a Steel 3/8" industrial coupler from the Breco 4 Series — a hig...

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    Original price $ 22.39
    Original price $ 22.39 - Original price $ 22.39
    Original price $ 22.39
    Current price $ 17.89
    $ 17.89 - $ 17.89
    Current price $ 17.89
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  • Original price $ 34.89
    Original price $ 34.89 - Original price $ 34.89
    Original price $ 34.89
    Current price $ 27.89
    $ 27.89 - $ 27.89
    Current price $ 27.89

    Breco B-3CF4-S, 3/8" Industrial Coupler x 1/2" Female NPT, 4 Series, Sleeve Guard, Steel

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3CF4-S is a Steel 3/8" industrial coupler from the Breco 4 Series — a hig...

    View full details
    Original price $ 34.89
    Original price $ 34.89 - Original price $ 34.89
    Original price $ 34.89
    Current price $ 27.89
    $ 27.89 - $ 27.89
    Current price $ 27.89
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  • Original price $ 26.79
    Original price $ 26.79 - Original price $ 26.79
    Original price $ 26.79
    Current price $ 21.39
    $ 21.39 - $ 21.39
    Current price $ 21.39

    Breco B-3CM2-S, 3/8" Industrial Coupler x 1/4" Male NPT, 4 Series, Sleeve Guard, Steel

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3CM2-S is a Steel 3/8" industrial coupler from the Breco 4 Series — a hig...

    View full details
    Original price $ 26.79
    Original price $ 26.79 - Original price $ 26.79
    Original price $ 26.79
    Current price $ 21.39
    $ 21.39 - $ 21.39
    Current price $ 21.39
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  • Original price $ 83.99
    Original price $ 83.99 - Original price $ 83.99
    Original price $ 83.99
    Current price $ 67.19
    $ 67.19 - $ 67.19
    Current price $ 67.19

    Breco B-3CM3-B, 3/8" Industrial Coupler x 3/8" Male NPT, 4 Series, Sleeve Guard, Brass w/Brass Sleeve

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Breco B-3CM3-B is a Brass w/Brass Sleeve 3/8" industrial coupler from the Breco 4...

    View full details
    Original price $ 83.99
    Original price $ 83.99 - Original price $ 83.99
    Original price $ 83.99
    Current price $ 67.19
    $ 67.19 - $ 67.19
    Current price $ 67.19
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