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🍁 Fall Savings Are Here – Get Up to 30% Off Select Fittings & Hose!
🍁 Fall Savings Are Here – Get Up to 30% Off Select Fittings & Hose!

ZSI Foster - 4 Series, 3/8" Body Industrial Interchange Pneumatic Couplers and Plugs

ZSI Foster's "4 Series" pneumatic fittings are the perfect solution for your industrial and manufacturing needs, including construction and repair shops. Made of durable brass or steel, these fittings are designed to connect flexible tubing such as polyurethane and nylon in various sizes. The quick-connect design allows for easy attachment and detachment from your pneumatic system, while their 3/8" industrial interchange compatibility means they can be used with fittings from other manufacturers. With their reliability and versatility, the "4 Series" fittings are a top choice for a wide range of pneumatic applications in construction and repair shops. Trust ZSI Foster to deliver high-quality fittings that get the job done right.
  • Original price $ 500.00
    Original price $ 500.00 - Original price $ 500.00
    Original price $ 500.00
    Current price $ 350.00
    $ 350.00 - $ 350.00
    Current price $ 350.00

    Foster FM4204, 4 Series, Industrial Coupler, Automatic, 3/8" Female NPT, Brass

    In stock

    Series: 4 Part Number: FM4204 Interchange: Industrial Body: 3/8" Coupler, Automatic Thread: 3/8" Female NPT, FPT Material: Heavy-Duty Bras...

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    Original price $ 500.00
    Original price $ 500.00 - Original price $ 500.00
    Original price $ 500.00
    Current price $ 350.00
    $ 350.00 - $ 350.00
    Current price $ 350.00
    Save 30% Save %
  • Original price $ 356.00
    Original price $ 356.00 - Original price $ 356.00
    Original price $ 356.00
    Current price $ 249.00
    $ 249.00 - $ 249.00
    Current price $ 249.00

    Foster FM4303, 4 Series, Industrial Coupler, Automatic, 3/8" Male NPT, Brass

    In stock

    Series: 4 Part Number: FM4304 Interchange: Industrial Body: 3/8" Coupler, Automatic Thread: 3/8" Male NPT, MPT Material: Heavy-Duty Brass,...

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    Original price $ 356.00
    Original price $ 356.00 - Original price $ 356.00
    Original price $ 356.00
    Current price $ 249.00
    $ 249.00 - $ 249.00
    Current price $ 249.00
    Save 30% Save %
  • Original price $ 97.00
    Original price $ 97.00 - Original price $ 97.00
    Original price $ 97.00
    Current price $ 68.00
    $ 68.00 - $ 68.00
    Current price $ 68.00

    Foster 43-4, 4 Series, Industrial Plug, 3/8" Female NPT, Steel

    In stock

    Series: 4 Part Number: 43-4 Interchange: Industrial Body: 3/8" Plug Thread: 3/8" Female NPT, FPT Material: Heavy-Duty Brass Rated Pressur...

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    Original price $ 97.00
    Original price $ 97.00 - Original price $ 97.00
    Original price $ 97.00
    Current price $ 68.00
    $ 68.00 - $ 68.00
    Current price $ 68.00
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  • Original price $ 90.00
    Original price $ 90.00 - Original price $ 90.00
    Original price $ 90.00
    Current price $ 63.00
    $ 63.00 - $ 63.00
    Current price $ 63.00

    Foster 42-4, 4 Series, Industrial Plug, 3/8" Male NPT, Steel

    In stock

    Series: 4 Part Number: 42-4 Interchange: Industrial Body: 3/8" Plug Thread: 3/8" Male NPT, MPT Material: Heavy-Duty Steel Rated Pressure:...

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    Original price $ 90.00
    Original price $ 90.00 - Original price $ 90.00
    Original price $ 90.00
    Current price $ 63.00
    $ 63.00 - $ 63.00
    Current price $ 63.00
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  • Original price $ 141.00
    Original price $ 141.00 - Original price $ 141.00
    Original price $ 141.00
    Current price $ 99.00
    $ 99.00 - $ 99.00
    Current price $ 99.00

    Foster 42-4B, 4 Series, Industrial Plug, 3/8" Male NPT, Brass

    In stock

    Series: 4 Part Number: 42-4B Interchange: Industrial Body: 3/8" Plug Thread: 3/8" Male NPT, MPT Material: Heavy-Duty Brass Rated Pressure...

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    Original price $ 141.00
    Original price $ 141.00 - Original price $ 141.00
    Original price $ 141.00
    Current price $ 99.00
    $ 99.00 - $ 99.00
    Current price $ 99.00
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  • Original price $ 500.00
    Original price $ 500.00 - Original price $ 500.00
    Original price $ 500.00
    Current price $ 350.00
    $ 350.00 - $ 350.00
    Current price $ 350.00

    Foster FM4304, 4 Series, Industrial Coupler, Automatic, 3/8" Male NPT, Brass

    In stock

    Series: 4 Part Number: FM4304 Interchange: Industrial Body: 3/8" Coupler, Automatic Thread: 3/8" Male NPT, MPT Material: Heavy-Duty Brass ...

    View full details
    Original price $ 500.00
    Original price $ 500.00 - Original price $ 500.00
    Original price $ 500.00
    Current price $ 350.00
    $ 350.00 - $ 350.00
    Current price $ 350.00
    Save 30% Save %
  • Original price $ 383.00
    Original price $ 383.00 - Original price $ 383.00
    Original price $ 383.00
    Current price $ 268.00
    $ 268.00 - $ 268.00
    Current price $ 268.00

    Foster 4204, 4 Series, Industrial Coupler, Manual, 3/8" Female NPT, Brass, Steel

    In stock

    Series: 4 Part Number: 4204 Interchange: Industrial, I/M Body: 3/8" Manual Coupler Thread: 3/8" Female NPT, FPT Material: Heavy-Duty Brass...

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    Original price $ 383.00
    Original price $ 383.00 - Original price $ 383.00
    Original price $ 383.00
    Current price $ 268.00
    $ 268.00 - $ 268.00
    Current price $ 268.00
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  • Original price $ 397.00
    Original price $ 397.00 - Original price $ 397.00
    Original price $ 397.00
    Current price $ 278.00
    $ 278.00 - $ 278.00
    Current price $ 278.00

    Foster 4304, 4 Series, Industrial Coupler, Manual, 3/8" Male NPT, Brass, Steel

    In stock

    Series: 4 Part Number: 4304 Interchange: Industrial, I/M Body: 3/8" Manual Coupler Thread: 3/8" Male NPT, MPT Material: Heavy-Duty Brass, ...

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    Original price $ 397.00
    Original price $ 397.00 - Original price $ 397.00
    Original price $ 397.00
    Current price $ 278.00
    $ 278.00 - $ 278.00
    Current price $ 278.00
    Save 30% Save %