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Foster 5 Series Couplers

The Foster 5 Series is the 1/2" body industrial interchange, a high-flow air coupler size for shop and industrial systems. This collection includes 5 Series couplers and plugs in brass, steel, and stainless with NPT, hose barb, push-on, and reusable terminations. Filter by thread, material, and coupler or plug to match your line.

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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass Save 20% Save %
$ 32.99
$ 32.99 - $ 32.99
$ 32.99
$ 26.39
$ 26.39 - $ 26.39
$ 26.39

Foster 5205H, 1/2" Industrial Coupler x 1/2" Female NPT, 5 Series, Heat/Viton, Brass/Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 5205H is a Brass/Steel 1/2" industrial coupler from the Foster 5...

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$ 32.99
$ 32.99 - $ 32.99
$ 32.99
$ 26.39
$ 26.39 - $ 26.39
$ 26.39
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass Save 20% Save %
$ 29.09
$ 29.09 - $ 29.09
$ 29.09
$ 23.29
$ 23.29 - $ 23.29
$ 23.29

Foster 5205LV, 1/2" Industrial Coupler x 1/2" Female NPT, 5 Series, Less Valve, Brass/Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 5205LV is a Brass/Steel 1/2" industrial coupler from the Foster ...

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$ 29.09
$ 29.09 - $ 29.09
$ 29.09
$ 23.29
$ 23.29 - $ 23.29
$ 23.29
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass Save 20% Save %
$ 57.99
$ 57.99 - $ 57.99
$ 57.99
$ 46.39
$ 46.39 - $ 46.39
$ 46.39

Foster 5205S/S, 1/2" Industrial Coupler x 1/2" Female NPT, 5 Series, 303 Stainless

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 5205S/S is a 303 Stainless 1/2" industrial coupler from the Fost...

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$ 57.99
$ 57.99 - $ 57.99
$ 57.99
$ 46.39
$ 46.39 - $ 46.39
$ 46.39
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass Save 20% Save %
$ 37.29
$ 37.29 - $ 37.29
$ 37.29
$ 29.79
$ 29.79 - $ 29.79
$ 29.79

Foster 5205W, 1/2" Industrial Coupler x 1/2" Female NPT, 5 Series, Water, Brass/SS

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 5205W is a Brass/SS 1/2" industrial coupler from the Foster 5 Se...

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$ 37.29
$ 37.29 - $ 37.29
$ 37.29
$ 29.79
$ 29.79 - $ 29.79
$ 29.79
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 18.99
$ 18.99 - $ 18.99
$ 18.99
$ 15.19
$ 15.19 - $ 15.19
$ 15.19

Foster 52S-5, 1/2" Industrial Plug x 3/8" Male NPT, 5 Series, Free Swivel, Brass/Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 52S-5 is a Brass/Steel 1/2" industrial plug from the Foster 5 Se...

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$ 18.99
$ 18.99 - $ 18.99
$ 18.99
$ 15.19
$ 15.19 - $ 15.19
$ 15.19
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 12.79
$ 12.79 - $ 12.79
$ 12.79
$ 10.19
$ 10.19 - $ 10.19
$ 10.19

Foster 53-5, 1/2" Industrial Plug x 3/8" Female NPT, 5 Series, Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 53-5 is a Steel 1/2" industrial plug from the Foster 5 Series — ...

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$ 12.79
$ 12.79 - $ 12.79
$ 12.79
$ 10.19
$ 10.19 - $ 10.19
$ 10.19
Save 20% Save %
Save 20% Save %
$ 12.79
$ 12.79 - $ 12.79
$ 12.79
$ 10.19
$ 10.19 - $ 10.19
$ 10.19

Foster 53-5, 5 Series, Industrial Plug, 3/8" Female NPT, Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 53-5 is a Steel 1/2" industrial plug from the Foster 5 Series — ...

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$ 12.79
$ 12.79 - $ 12.79
$ 12.79
$ 10.19
$ 10.19 - $ 10.19
$ 10.19
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 30.89
$ 30.89 - $ 30.89
$ 30.89
$ 24.69
$ 24.69 - $ 24.69
$ 24.69

Foster 5305, 1/2" Industrial Coupler x 1/2" Male NPT, 5 Series, Brass/Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 5305 is a Brass/Steel 1/2" industrial coupler from the Foster 5 ...

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$ 30.89
$ 30.89 - $ 30.89
$ 30.89
$ 24.69
$ 24.69 - $ 24.69
$ 24.69
Save 20% Save %
Save 20% Save %
$ 30.89
$ 30.89 - $ 30.89
$ 30.89
$ 24.69
$ 24.69 - $ 24.69
$ 24.69

Foster 5305, 5 Series, Industrial Coupler, Automatic, 1/2" Male NPT, Brass, Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 5305 is a Brass/Steel 1/2" industrial coupler from the Foster 5 ...

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$ 30.89
$ 30.89 - $ 30.89
$ 30.89
$ 24.69
$ 24.69 - $ 24.69
$ 24.69
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 32.99
$ 32.99 - $ 32.99
$ 32.99
$ 26.39
$ 26.39 - $ 26.39
$ 26.39

Foster 5305H, 1/2" Industrial Coupler x 1/2" Male NPT, 5 Series, Heat/Viton, Brass/Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 5305H is a Brass/Steel 1/2" industrial coupler from the Foster 5...

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$ 32.99
$ 32.99 - $ 32.99
$ 32.99
$ 26.39
$ 26.39 - $ 26.39
$ 26.39
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 56.49
$ 56.49 - $ 56.49
$ 56.49
$ 45.19
$ 45.19 - $ 45.19
$ 45.19

Foster 5305S/S, 1/2" Industrial Coupler x 1/2" Male NPT, 5 Series, 303 Stainless

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 5305S/S is a 303 Stainless 1/2" industrial coupler from the Fost...

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$ 56.49
$ 56.49 - $ 56.49
$ 56.49
$ 45.19
$ 45.19 - $ 45.19
$ 45.19
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 37.29
$ 37.29 - $ 37.29
$ 37.29
$ 29.79
$ 29.79 - $ 29.79
$ 29.79

Foster 5305W, 1/2" Industrial Coupler x 1/2" Male NPT, 5 Series, Water, Brass/SS

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 5305W is a Brass/SS 1/2" industrial coupler from the Foster 5 Se...

View full details
$ 37.29
$ 37.29 - $ 37.29
$ 37.29
$ 29.79
$ 29.79 - $ 29.79
$ 29.79
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 7.39
$ 7.39 - $ 7.39
$ 7.39
$ 5.89
$ 5.89 - $ 5.89
$ 5.89

Foster 54-5, 1/2" Industrial Plug x 1/2" Male NPT, 5 Series, Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 54-5 is a Steel 1/2" industrial plug from the Foster 5 Series — ...

View full details
$ 7.39
$ 7.39 - $ 7.39
$ 7.39
$ 5.89
$ 5.89 - $ 5.89
$ 5.89
Save 20% Save %
Save 20% Save %
$ 7.39
$ 7.39 - $ 7.39
$ 7.39
$ 5.89
$ 5.89 - $ 5.89
$ 5.89

Foster 54-5, 5 Series, Industrial Plug, 1/2" Male NPT, Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 54-5 is a Steel 1/2" industrial plug from the Foster 5 Series — ...

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$ 7.39
$ 7.39 - $ 7.39
$ 7.39
$ 5.89
$ 5.89 - $ 5.89
$ 5.89
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 16.29
$ 16.29 - $ 16.29
$ 16.29
$ 12.99
$ 12.99 - $ 12.99
$ 12.99

Foster 54-5B, 1/2" Industrial Plug x 1/2" Male NPT, 5 Series, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 54-5B is a Brass 1/2" industrial plug from the Foster 5 Series —...

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$ 16.29
$ 16.29 - $ 16.29
$ 16.29
$ 12.99
$ 12.99 - $ 12.99
$ 12.99
Save 20% Save %
Save 20% Save %
$ 16.29
$ 16.29 - $ 16.29
$ 16.29
$ 12.99
$ 12.99 - $ 12.99
$ 12.99

Foster 54-5B, 5 Series, Industrial Plug, 1/2" Male NPT, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 54-5B is a Brass 1/2" industrial plug from the Foster 5 Series —...

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$ 16.29
$ 16.29 - $ 16.29
$ 16.29
$ 12.99
$ 12.99 - $ 12.99
$ 12.99
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 19% Save %
$ 13.89
$ 13.89 - $ 13.89
$ 13.89
$ 11.19
$ 11.19 - $ 11.19
$ 11.19

Foster 54-5G, 1/2" Industrial Plug x 1/2" Male NPT, 5 Series, Ball Check, Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 54-5G is a Steel 1/2" industrial plug from the Foster 5 Series —...

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$ 13.89
$ 13.89 - $ 13.89
$ 13.89
$ 11.19
$ 11.19 - $ 11.19
$ 11.19
Save 19% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 22.39
$ 22.39 - $ 22.39
$ 22.39
$ 17.89
$ 17.89 - $ 17.89
$ 17.89

Foster 54-5GB, 1/2" Industrial Plug x 1/2" Male NPT, 5 Series, Ball Check, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 54-5GB is a Brass 1/2" industrial plug from the Foster 5 Series ...

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$ 22.39
$ 22.39 - $ 22.39
$ 22.39
$ 17.89
$ 17.89 - $ 17.89
$ 17.89
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 18.09
$ 18.09 - $ 18.09
$ 18.09
$ 14.49
$ 14.49 - $ 14.49
$ 14.49

Foster 54-5S/S, 1/2" Industrial Plug x 1/2" Male NPT, 5 Series, 303 Stainless

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 54-5S/S is a 303 Stainless 1/2" industrial plug from the Foster ...

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$ 18.09
$ 18.09 - $ 18.09
$ 18.09
$ 14.49
$ 14.49 - $ 14.49
$ 14.49
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 31.29
$ 31.29 - $ 31.29
$ 31.29
$ 25.09
$ 25.09 - $ 25.09
$ 25.09

Foster 5405, 1/2" Industrial Coupler x 3/4" Female NPT, 5 Series, Brass/Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 5405 is a Brass/Steel 1/2" industrial coupler from the Foster 5 ...

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$ 31.29
$ 31.29 - $ 31.29
$ 31.29
$ 25.09
$ 25.09 - $ 25.09
$ 25.09
Save 20% Save %
Save 20% Save %
$ 31.29
$ 31.29 - $ 31.29
$ 31.29
$ 25.09
$ 25.09 - $ 25.09
$ 25.09

Foster 5405, 5 Series, Industrial Coupler, Automatic, 3/4" Female NPT, Brass, Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 5405 is a Brass/Steel 1/2" industrial coupler from the Foster 5 ...

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$ 31.29
$ 31.29 - $ 31.29
$ 31.29
$ 25.09
$ 25.09 - $ 25.09
$ 25.09
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 37.69
$ 37.69 - $ 37.69
$ 37.69
$ 30.19
$ 30.19 - $ 30.19
$ 30.19

Foster 5405W, 1/2" Industrial Coupler x 3/4" Female NPT, 5 Series, Water, Brass/SS

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 5405W is a Brass/SS 1/2" industrial coupler from the Foster 5 Se...

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$ 37.69
$ 37.69 - $ 37.69
$ 37.69
$ 30.19
$ 30.19 - $ 30.19
$ 30.19
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 13.79
$ 13.79 - $ 13.79
$ 13.79
$ 10.99
$ 10.99 - $ 10.99
$ 10.99

Foster 54S-5, 1/2" Industrial Plug x 1/2" Male NPT, 5 Series, Free Swivel, Brass/Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 54S-5 is a Brass/Steel 1/2" industrial plug from the Foster 5 Se...

View full details
$ 13.79
$ 13.79 - $ 13.79
$ 13.79
$ 10.99
$ 10.99 - $ 10.99
$ 10.99
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 7.89
$ 7.89 - $ 7.89
$ 7.89
$ 6.29
$ 6.29 - $ 6.29
$ 6.29

Foster 55-5, 1/2" Industrial Plug x 1/2" Female NPT, 5 Series, Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 55-5 is a Steel 1/2" industrial plug from the Foster 5 Series — ...

View full details
$ 7.89
$ 7.89 - $ 7.89
$ 7.89
$ 6.29
$ 6.29 - $ 6.29
$ 6.29
Save 20% Save %

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