Skip to content

Foster

  • Original price $ 6.69
    Original price $ 6.69 - Original price $ 6.69
    Original price $ 6.69
    Current price $ 5.39
    $ 5.39 - $ 5.39
    Current price $ 5.39

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

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 43-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-flo...

    View full details
    Original price $ 6.69
    Original price $ 6.69 - Original price $ 6.69
    Original price $ 6.69
    Current price $ 5.39
    $ 5.39 - $ 5.39
    Current price $ 5.39
    Save 19% Save %
  • Original price $ 6.69
    Original price $ 6.69 - Original price $ 6.69
    Original price $ 6.69
    Current price $ 5.39
    $ 5.39 - $ 5.39
    Current price $ 5.39

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

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 43-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-flo...

    View full details
    Original price $ 6.69
    Original price $ 6.69 - Original price $ 6.69
    Original price $ 6.69
    Current price $ 5.39
    $ 5.39 - $ 5.39
    Current price $ 5.39
    Save 19% Save %
  • Original price $ 19.39
    Original price $ 19.39 - Original price $ 19.39
    Original price $ 19.39
    Current price $ 15.49
    $ 15.49 - $ 15.49
    Current price $ 15.49

    Foster 43-4S/S, 3/8" Industrial Plug x 3/8" Female NPT, 4 Series, 303 Stainless

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 43-4S/S is a 303 Stainless 3/8" industrial plug from the Foster 4 Series —...

    View full details
    Original price $ 19.39
    Original price $ 19.39 - Original price $ 19.39
    Original price $ 19.39
    Current price $ 15.49
    $ 15.49 - $ 15.49
    Current price $ 15.49
    Save 20% Save %
  • Original price $ 25.19
    Original price $ 25.19 - Original price $ 25.19
    Original price $ 25.19
    Current price $ 20.09
    $ 20.09 - $ 20.09
    Current price $ 20.09

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

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 4304 is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series — a...

    View full details
    Original price $ 25.19
    Original price $ 25.19 - Original price $ 25.19
    Original price $ 25.19
    Current price $ 20.09
    $ 20.09 - $ 20.09
    Current price $ 20.09
    Save 20% Save %
  • Original price $ 25.19
    Original price $ 25.19 - Original price $ 25.19
    Original price $ 25.19
    Current price $ 20.09
    $ 20.09 - $ 20.09
    Current price $ 20.09

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

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 4304 is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series — a...

    View full details
    Original price $ 25.19
    Original price $ 25.19 - Original price $ 25.19
    Original price $ 25.19
    Current price $ 20.09
    $ 20.09 - $ 20.09
    Current price $ 20.09
    Save 20% Save %
  • Original price $ 30.19
    Original price $ 30.19 - Original price $ 30.19
    Original price $ 30.19
    Current price $ 24.09
    $ 24.09 - $ 24.09
    Current price $ 24.09

    Foster 4304S, 3/8" Industrial Coupler x 3/8" Male NPT, 4 Series, Steam/EPDM, Brass body, Brass sleeve, SS valve

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 4304S is a Brass body, Brass sleeve, SS valve 3/8" industrial coupler from...

    View full details
    Original price $ 30.19
    Original price $ 30.19 - Original price $ 30.19
    Original price $ 30.19
    Current price $ 24.09
    $ 24.09 - $ 24.09
    Current price $ 24.09
    Save 20% Save %
  • Original price $ 49.39
    Original price $ 49.39 - Original price $ 49.39
    Original price $ 49.39
    Current price $ 39.49
    $ 39.49 - $ 39.49
    Current price $ 39.49

    Foster 4304S/S, 3/8" Industrial Coupler x 3/8" Male NPT, 4 Series, 303 Stainless

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 4304S/S is a 303 Stainless 3/8" industrial coupler from the Foster 4 Serie...

    View full details
    Original price $ 49.39
    Original price $ 49.39 - Original price $ 49.39
    Original price $ 49.39
    Current price $ 39.49
    $ 39.49 - $ 39.49
    Current price $ 39.49
    Save 20% Save %
  • Original price $ 29.49
    Original price $ 29.49 - Original price $ 29.49
    Original price $ 29.49
    Current price $ 23.59
    $ 23.59 - $ 23.59
    Current price $ 23.59

    Foster 4304W, 3/8" Industrial Coupler x 3/8" Male NPT, 4 Series, Water, Brass/SS

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 4304W is a Brass/SS 3/8" industrial coupler from the Foster 4 Series — a h...

    View full details
    Original price $ 29.49
    Original price $ 29.49 - Original price $ 29.49
    Original price $ 29.49
    Current price $ 23.59
    $ 23.59 - $ 23.59
    Current price $ 23.59
    Save 20% Save %
  • Original price $ 6.99
    Original price $ 6.99 - Original price $ 6.99
    Original price $ 6.99
    Current price $ 5.59
    $ 5.59 - $ 5.59
    Current price $ 5.59

    Foster 44-4, 3/8" Industrial Plug x 1/2" Male NPT, 4 Series, Steel

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 44-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-flo...

    View full details
    Original price $ 6.99
    Original price $ 6.99 - Original price $ 6.99
    Original price $ 6.99
    Current price $ 5.59
    $ 5.59 - $ 5.59
    Current price $ 5.59
    Save 20% Save %
  • Original price $ 6.99
    Original price $ 6.99 - Original price $ 6.99
    Original price $ 6.99
    Current price $ 5.59
    $ 5.59 - $ 5.59
    Current price $ 5.59

    Foster 44-4, 4 Series, Industrial Plug, 1/2" Male NPT, Steel

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 44-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-flo...

    View full details
    Original price $ 6.99
    Original price $ 6.99 - Original price $ 6.99
    Original price $ 6.99
    Current price $ 5.59
    $ 5.59 - $ 5.59
    Current price $ 5.59
    Save 20% Save %
  • Original price $ 27.99
    Original price $ 27.99 - Original price $ 27.99
    Original price $ 27.99
    Current price $ 22.39
    $ 22.39 - $ 22.39
    Current price $ 22.39

    Foster 4404, 3/8" Industrial Coupler x 1/2" Female NPT, 4 Series, Brass/Steel

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 4404 is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series — a...

    View full details
    Original price $ 27.99
    Original price $ 27.99 - Original price $ 27.99
    Original price $ 27.99
    Current price $ 22.39
    $ 22.39 - $ 22.39
    Current price $ 22.39
    Save 20% Save %
  • Original price $ 27.99
    Original price $ 27.99 - Original price $ 27.99
    Original price $ 27.99
    Current price $ 22.39
    $ 22.39 - $ 22.39
    Current price $ 22.39

    Foster 4404, 4 Series, Industrial Coupler, Manual, 1/2" Female NPT, Brass, Steel

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 4404 is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series — a...

    View full details
    Original price $ 27.99
    Original price $ 27.99 - Original price $ 27.99
    Original price $ 27.99
    Current price $ 22.39
    $ 22.39 - $ 22.39
    Current price $ 22.39
    Save 20% Save %
  • Original price $ 17.19
    Original price $ 17.19 - Original price $ 17.19
    Original price $ 17.19
    Current price $ 13.69
    $ 13.69 - $ 13.69
    Current price $ 13.69

    Foster 44S-4, 3/8" Industrial Plug x 1/2" Male NPT, 4 Series, Free Swivel, Brass/Steel

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 44S-4 is a Brass/Steel 3/8" industrial plug from the Foster 4 Series — a h...

    View full details
    Original price $ 17.19
    Original price $ 17.19 - Original price $ 17.19
    Original price $ 17.19
    Current price $ 13.69
    $ 13.69 - $ 13.69
    Current price $ 13.69
    Save 20% Save %
  • Original price $ 9.29
    Original price $ 9.29 - Original price $ 9.29
    Original price $ 9.29
    Current price $ 7.39
    $ 7.39 - $ 7.39
    Current price $ 7.39

    Foster 45-4, 3/8" Industrial Plug x 1/2" Female NPT, 4 Series, Steel

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 45-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-flo...

    View full details
    Original price $ 9.29
    Original price $ 9.29 - Original price $ 9.29
    Original price $ 9.29
    Current price $ 7.39
    $ 7.39 - $ 7.39
    Current price $ 7.39
    Save 20% Save %
  • Original price $ 9.29
    Original price $ 9.29 - Original price $ 9.29
    Original price $ 9.29
    Current price $ 7.39
    $ 7.39 - $ 7.39
    Current price $ 7.39

    Foster 45-4, 4 Series, Industrial Plug, 1/2" Female NPT, Steel

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 45-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-flo...

    View full details
    Original price $ 9.29
    Original price $ 9.29 - Original price $ 9.29
    Original price $ 9.29
    Current price $ 7.39
    $ 7.39 - $ 7.39
    Current price $ 7.39
    Save 20% Save %
  • Original price $ 27.99
    Original price $ 27.99 - Original price $ 27.99
    Original price $ 27.99
    Current price $ 22.39
    $ 22.39 - $ 22.39
    Current price $ 22.39

    Foster 4504, 3/8" Industrial Coupler x 1/2" Male NPT, 4 Series, Brass/Steel

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 4504 is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series — a...

    View full details
    Original price $ 27.99
    Original price $ 27.99 - Original price $ 27.99
    Original price $ 27.99
    Current price $ 22.39
    $ 22.39 - $ 22.39
    Current price $ 22.39
    Save 20% Save %
  • Original price $ 27.99
    Original price $ 27.99 - Original price $ 27.99
    Original price $ 27.99
    Current price $ 22.39
    $ 22.39 - $ 22.39
    Current price $ 22.39

    Foster 4504, 4 Series, Industrial Coupler, Manual, 1/2" Male NPT, Brass, Steel

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 4504 is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series — a...

    View full details
    Original price $ 27.99
    Original price $ 27.99 - Original price $ 27.99
    Original price $ 27.99
    Current price $ 22.39
    $ 22.39 - $ 22.39
    Current price $ 22.39
    Save 20% Save %
  • Original price $ 32.99
    Original price $ 32.99 - Original price $ 32.99
    Original price $ 32.99
    Current price $ 26.39
    $ 26.39 - $ 26.39
    Current price $ 26.39

    Foster 4504H, 3/8" Industrial Coupler x 1/2" Male NPT, 4 Series, Heat/Viton, Brass/Steel

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 4504H is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series — ...

    View full details
    Original price $ 32.99
    Original price $ 32.99 - Original price $ 32.99
    Original price $ 32.99
    Current price $ 26.39
    $ 26.39 - $ 26.39
    Current price $ 26.39
    Save 20% Save %
  • Original price $ 32.99
    Original price $ 32.99 - Original price $ 32.99
    Original price $ 32.99
    Current price $ 26.39
    $ 26.39 - $ 26.39
    Current price $ 26.39

    Foster 4504S, 3/8" Industrial Coupler x 1/2" Male NPT, 4 Series, Steam/EPDM, Brass body, Brass sleeve, SS valve

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 4504S is a Brass body, Brass sleeve, SS valve 3/8" industrial coupler from...

    View full details
    Original price $ 32.99
    Original price $ 32.99 - Original price $ 32.99
    Original price $ 32.99
    Current price $ 26.39
    $ 26.39 - $ 26.39
    Current price $ 26.39
    Save 20% Save %
  • 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

    Foster 4504W, 3/8" Industrial Coupler x 1/2" Male NPT, 4 Series, Water, Brass/SS

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 4504W is a Brass/SS 3/8" industrial coupler from the Foster 4 Series — a h...

    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
    Save 20% Save %
  • Original price $ 8.79
    Original price $ 8.79 - Original price $ 8.79
    Original price $ 8.79
    Current price $ 6.99
    $ 6.99 - $ 6.99
    Current price $ 6.99

    Foster 46-4, 3/8" Industrial Plug x 1/4" Hose ID, 4 Series, Steel

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 46-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-flo...

    View full details
    Original price $ 8.79
    Original price $ 8.79 - Original price $ 8.79
    Original price $ 8.79
    Current price $ 6.99
    $ 6.99 - $ 6.99
    Current price $ 6.99
    Save 20% Save %
  • Original price $ 27.39
    Original price $ 27.39 - Original price $ 27.39
    Original price $ 27.39
    Current price $ 21.89
    $ 21.89 - $ 21.89
    Current price $ 21.89

    Foster 4604, 3/8" Industrial Coupler x 1/4" Hose ID, 4 Series, Brass/Steel

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 4604 is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series — a...

    View full details
    Original price $ 27.39
    Original price $ 27.39 - Original price $ 27.39
    Original price $ 27.39
    Current price $ 21.89
    $ 21.89 - $ 21.89
    Current price $ 21.89
    Save 20% Save %
  • Original price $ 27.39
    Original price $ 27.39 - Original price $ 27.39
    Original price $ 27.39
    Current price $ 21.89
    $ 21.89 - $ 21.89
    Current price $ 21.89

    Foster 4604, 4 Series, Industrial Coupler, Manual, 1/4" Hose Barb, Brass, Steel

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 4604 is a Brass/Steel 3/8" industrial coupler from the Foster 4 Series — a...

    View full details
    Original price $ 27.39
    Original price $ 27.39 - Original price $ 27.39
    Original price $ 27.39
    Current price $ 21.89
    $ 21.89 - $ 21.89
    Current price $ 21.89
    Save 20% Save %
  • Original price $ 32.39
    Original price $ 32.39 - Original price $ 32.39
    Original price $ 32.39
    Current price $ 25.99
    $ 25.99 - $ 25.99
    Current price $ 25.99

    Foster 4604W, 3/8" Industrial Coupler x 1/4" Hose ID, 4 Series, Water, Brass/SS

    In stock

    Reliable, leak-free 3/8" connections for air and fluid lines. The Foster 4604W is a Brass/SS 3/8" industrial coupler from the Foster 4 Series — a h...

    View full details
    Original price $ 32.39
    Original price $ 32.39 - Original price $ 32.39
    Original price $ 32.39
    Current price $ 25.99
    $ 25.99 - $ 25.99
    Current price $ 25.99
    Save 20% Save %