Skip to content
☀️ Take an Additional 10% Off Your Entire Order with code GEARUP10 at checkout.
☀️ Additional 10% Off • GEARUP10

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.

Filters

Save 20% Save %
$ 561.00
$ 561.00 - $ 561.00
$ 561.00
$ 450.00
$ 450.00 - $ 450.00
$ 450.00

5505, 5 Series, Industrial Coupler, Automatic, 3/4" Male NPT, Brass, Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 5505 is a Brass/Steel 1/2" industrial coupler from the Foster 5 ...

View full details
$ 561.00
$ 561.00 - $ 561.00
$ 561.00
$ 450.00
$ 450.00 - $ 450.00
$ 450.00
Save 20% Save %
Save 20% Save %
$ 611.00
$ 611.00 - $ 611.00
$ 611.00
$ 489.00
$ 489.00 - $ 489.00
$ 489.00

5605, 5 Series, Industrial Coupler, Automatic, 1/4" Hose Barb, Brass, Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 5605 is a Brass/Steel 1/2" industrial coupler from the Foster 5 ...

View full details
$ 611.00
$ 611.00 - $ 611.00
$ 611.00
$ 489.00
$ 489.00 - $ 489.00
$ 489.00
Save 20% Save %
Save 20% Save %
$ 597.00
$ 597.00 - $ 597.00
$ 597.00
$ 478.00
$ 478.00 - $ 478.00
$ 478.00

5705, 5 Series, Industrial Coupler, Automatic, 3/8" Hose Barb, Brass, Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 5705 is a Brass/Steel 1/2" industrial coupler from the Foster 5 ...

View full details
$ 597.00
$ 597.00 - $ 597.00
$ 597.00
$ 478.00
$ 478.00 - $ 478.00
$ 478.00
Save 20% Save %
Save 20% Save %
$ 517.00
$ 517.00 - $ 517.00
$ 517.00
$ 414.00
$ 414.00 - $ 414.00
$ 414.00

81-5B, 5 Series, Industrial Plug, 1/2" Hose Barb, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 81-5B is a Brass 1/2" industrial plug from the Foster 5 Series —...

View full details
$ 517.00
$ 517.00 - $ 517.00
$ 517.00
$ 414.00
$ 414.00 - $ 414.00
$ 414.00
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 %
$ 528.00
$ 528.00 - $ 528.00
$ 528.00
$ 422.00
$ 422.00 - $ 422.00
$ 422.00

Foster 1815, 1/2" Industrial Coupler x 1/2" Push-On Hose Stem, 5 Series, Brass/Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 1815 is a Brass/Steel 1/2" industrial coupler from the Foster 5 ...

View full details
$ 528.00
$ 528.00 - $ 528.00
$ 528.00
$ 422.00
$ 422.00 - $ 422.00
$ 422.00
Save 20% Save %
Save 20% Save %
$ 528.00
$ 528.00 - $ 528.00
$ 528.00
$ 422.00
$ 422.00 - $ 422.00
$ 422.00

Foster 1815, 5 Series, Industrial Coupler, Automatic, 1/2" Push-On Hose Barb, Brass, Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 1815 is a Brass/Steel 1/2" industrial coupler from the Foster 5 ...

View full details
$ 528.00
$ 528.00 - $ 528.00
$ 528.00
$ 422.00
$ 422.00 - $ 422.00
$ 422.00
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 %
$ 545.00
$ 545.00 - $ 545.00
$ 545.00
$ 436.00
$ 436.00 - $ 436.00
$ 436.00

Foster 1815W, 1/2" Industrial Coupler x 1/2" Push-On Hose Stem, 5 Series, Water, Brass/SS

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 1815W is a Brass/SS 1/2" industrial coupler from the Foster 5 Se...

View full details
$ 545.00
$ 545.00 - $ 545.00
$ 545.00
$ 436.00
$ 436.00 - $ 436.00
$ 436.00
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 %
$ 604.00
$ 604.00 - $ 604.00
$ 604.00
$ 484.00
$ 484.00 - $ 484.00
$ 484.00

Foster 4015, 1/2" Industrial Coupler x 1/4" Female NPT, 5 Series, Brass/Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 4015 is a Brass/Steel 1/2" industrial coupler from the Foster 5 ...

View full details
$ 604.00
$ 604.00 - $ 604.00
$ 604.00
$ 484.00
$ 484.00 - $ 484.00
$ 484.00
Save 20% Save %
Save 20% Save %
$ 604.00
$ 604.00 - $ 604.00
$ 604.00
$ 484.00
$ 484.00 - $ 484.00
$ 484.00

Foster 4015, 5 Series, Industrial Coupler, Automatic, 1/2" Female NPT, Brass, Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 4015 is a Brass/Steel 1/2" industrial coupler from the Foster 5 ...

View full details
$ 604.00
$ 604.00 - $ 604.00
$ 604.00
$ 484.00
$ 484.00 - $ 484.00
$ 484.00
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 %
$ 604.00
$ 604.00 - $ 604.00
$ 604.00
$ 484.00
$ 484.00 - $ 484.00
$ 484.00

Foster 4905, 1/2" Industrial Coupler x 1/4" Male NPT, 5 Series, Brass/Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 4905 is a Brass/Steel 1/2" industrial coupler from the Foster 5 ...

View full details
$ 604.00
$ 604.00 - $ 604.00
$ 604.00
$ 484.00
$ 484.00 - $ 484.00
$ 484.00
Save 20% Save %
Save 20% Save %
$ 604.00
$ 604.00 - $ 604.00
$ 604.00
$ 484.00
$ 484.00 - $ 484.00
$ 484.00

Foster 4905, 5 Series, Industrial Coupler, Automatic, 1/4" Male NPT, Brass, Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 4905 is a Brass/Steel 1/2" industrial coupler from the Foster 5 ...

View full details
$ 604.00
$ 604.00 - $ 604.00
$ 604.00
$ 484.00
$ 484.00 - $ 484.00
$ 484.00
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 %
$ 101.00
$ 101.00 - $ 101.00
$ 101.00
$ 82.00
$ 82.00 - $ 82.00
$ 82.00

Foster 50-5, 1/2" Industrial Plug x 1/4" Male NPT, 5 Series, Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 50-5 is a Steel 1/2" industrial plug from the Foster 5 Series — ...

View full details
$ 101.00
$ 101.00 - $ 101.00
$ 101.00
$ 82.00
$ 82.00 - $ 82.00
$ 82.00
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 %
$ 561.00
$ 561.00 - $ 561.00
$ 561.00
$ 448.00
$ 448.00 - $ 448.00
$ 448.00

Foster 5005, 1/2" Industrial Coupler x 3/8" Female NPT, 5 Series, Brass/Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 5005 is a Brass/Steel 1/2" industrial coupler from the Foster 5 ...

View full details
$ 561.00
$ 561.00 - $ 561.00
$ 561.00
$ 448.00
$ 448.00 - $ 448.00
$ 448.00
Save 20% Save %
Save 20% Save %
$ 561.00
$ 561.00 - $ 561.00
$ 561.00
$ 448.00
$ 448.00 - $ 448.00
$ 448.00

Foster 5005, 5 Series, Industrial Coupler, Automatic, 3/8" Female NPT, Brass, Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 5005 is a Brass/Steel 1/2" industrial coupler from the Foster 5 ...

View full details
$ 561.00
$ 561.00 - $ 561.00
$ 561.00
$ 448.00
$ 448.00 - $ 448.00
$ 448.00
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 %
$ 577.00
$ 577.00 - $ 577.00
$ 577.00
$ 462.00
$ 462.00 - $ 462.00
$ 462.00

Foster 5005H, 1/2" Industrial Coupler x 3/8" Female NPT, 5 Series, Heat/Viton, Brass/Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 5005H is a Brass/Steel 1/2" industrial coupler from the Foster 5...

View full details
$ 577.00
$ 577.00 - $ 577.00
$ 577.00
$ 462.00
$ 462.00 - $ 462.00
$ 462.00
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 %
$ 678.00
$ 678.00 - $ 678.00
$ 678.00
$ 542.00
$ 542.00 - $ 542.00
$ 542.00

Foster 5005W, 1/2" Industrial Coupler x 3/8" Female NPT, 5 Series, Water, Brass/SS

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 5005W is a Brass/SS 1/2" industrial coupler from the Foster 5 Se...

View full details
$ 678.00
$ 678.00 - $ 678.00
$ 678.00
$ 542.00
$ 542.00 - $ 542.00
$ 542.00
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 %
$ 561.00
$ 561.00 - $ 561.00
$ 561.00
$ 448.00
$ 448.00 - $ 448.00
$ 448.00

Foster 5105, 1/2" Industrial Coupler x 3/8" Male NPT, 5 Series, Brass/Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 5105 is a Brass/Steel 1/2" industrial coupler from the Foster 5 ...

View full details
$ 561.00
$ 561.00 - $ 561.00
$ 561.00
$ 448.00
$ 448.00 - $ 448.00
$ 448.00
Save 20% Save %
Save 20% Save %
$ 561.00
$ 561.00 - $ 561.00
$ 561.00
$ 448.00
$ 448.00 - $ 448.00
$ 448.00

Foster 5105, 5 Series, Industrial Coupler, Automatic, 3/8" Male NPT, Brass, Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster 5105 is a Brass/Steel 1/2" industrial coupler from the Foster 5 ...

View full details
$ 561.00
$ 561.00 - $ 561.00
$ 561.00
$ 448.00
$ 448.00 - $ 448.00
$ 448.00
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 %
$ 122.00
$ 122.00 - $ 122.00
$ 122.00
$ 98.00
$ 98.00 - $ 98.00
$ 98.00

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

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

View full details
$ 122.00
$ 122.00 - $ 122.00
$ 122.00
$ 98.00
$ 98.00 - $ 98.00
$ 98.00
Save 20% Save %
Save 20% Save %
$ 122.00
$ 122.00 - $ 122.00
$ 122.00
$ 98.00
$ 98.00 - $ 98.00
$ 98.00

Foster 52-5, 5 Series, Industrial Plug, 3/8" Male NPT, Steel

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

View full details
$ 122.00
$ 122.00 - $ 122.00
$ 122.00
$ 98.00
$ 98.00 - $ 98.00
$ 98.00
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 %
$ 282.00
$ 282.00 - $ 282.00
$ 282.00
$ 225.00
$ 225.00 - $ 225.00
$ 225.00

Foster 52-5B, 1/2" Industrial Plug x 3/8" Male NPT, 5 Series, Brass

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

View full details
$ 282.00
$ 282.00 - $ 282.00
$ 282.00
$ 225.00
$ 225.00 - $ 225.00
$ 225.00
Save 20% Save %
Save 20% Save %
$ 282.00
$ 282.00 - $ 282.00
$ 282.00
$ 225.00
$ 225.00 - $ 225.00
$ 225.00

Foster 52-5B, 5 Series, Industrial Plug, 3/8" Male NPT, Brass

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

View full details
$ 282.00
$ 282.00 - $ 282.00
$ 282.00
$ 225.00
$ 225.00 - $ 225.00
$ 225.00
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 %
$ 540.00
$ 540.00 - $ 540.00
$ 540.00
$ 432.00
$ 432.00 - $ 432.00
$ 432.00

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

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

View full details
$ 540.00
$ 540.00 - $ 540.00
$ 540.00
$ 432.00
$ 432.00 - $ 432.00
$ 432.00
Save 20% Save %
Save 20% Save %
$ 540.00
$ 540.00 - $ 540.00
$ 540.00
$ 432.00
$ 432.00 - $ 432.00
$ 432.00

Foster 5205, 5 Series, Industrial Coupler, Automatic, 1/2" Female NPT, Brass, Steel

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

View full details
$ 540.00
$ 540.00 - $ 540.00
$ 540.00
$ 432.00
$ 432.00 - $ 432.00
$ 432.00
Save 20% Save %

Request a Quote

Bulk and dealer pricing. Tell us what you need and we’ll reply within one business day.