Skip to content
Fall Ready Sale15% off everything through Oct 31FALLREADY15Tap to apply at checkout →
15% off through Oct 31FALLREADY15Tap to apply →

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 %
$ 600.00
$ 600.00 - $ 600.00
$ 600.00
$ 481.00
$ 481.00 - $ 481.00
$ 481.00

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
$ 600.00
$ 600.00 - $ 600.00
$ 600.00
$ 481.00
$ 481.00 - $ 481.00
$ 481.00
Save 20% Save %
Save 20% Save %
$ 653.00
$ 653.00 - $ 653.00
$ 653.00
$ 523.00
$ 523.00 - $ 523.00
$ 523.00

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
$ 653.00
$ 653.00 - $ 653.00
$ 653.00
$ 523.00
$ 523.00 - $ 523.00
$ 523.00
Save 20% Save %
Save 20% Save %
$ 638.00
$ 638.00 - $ 638.00
$ 638.00
$ 511.00
$ 511.00 - $ 511.00
$ 511.00

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
$ 638.00
$ 638.00 - $ 638.00
$ 638.00
$ 511.00
$ 511.00 - $ 511.00
$ 511.00
Save 20% Save %
Save 20% Save %
$ 553.00
$ 553.00 - $ 553.00
$ 553.00
$ 443.00
$ 443.00 - $ 443.00
$ 443.00

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
$ 553.00
$ 553.00 - $ 553.00
$ 553.00
$ 443.00
$ 443.00 - $ 443.00
$ 443.00
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 %
$ 564.00
$ 564.00 - $ 564.00
$ 564.00
$ 451.00
$ 451.00 - $ 451.00
$ 451.00

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
$ 564.00
$ 564.00 - $ 564.00
$ 564.00
$ 451.00
$ 451.00 - $ 451.00
$ 451.00
Save 20% Save %
Save 20% Save %
$ 564.00
$ 564.00 - $ 564.00
$ 564.00
$ 451.00
$ 451.00 - $ 451.00
$ 451.00

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
$ 564.00
$ 564.00 - $ 564.00
$ 564.00
$ 451.00
$ 451.00 - $ 451.00
$ 451.00
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 %
$ 583.00
$ 583.00 - $ 583.00
$ 583.00
$ 466.00
$ 466.00 - $ 466.00
$ 466.00

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
$ 583.00
$ 583.00 - $ 583.00
$ 583.00
$ 466.00
$ 466.00 - $ 466.00
$ 466.00
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 %
$ 646.00
$ 646.00 - $ 646.00
$ 646.00
$ 517.00
$ 517.00 - $ 517.00
$ 517.00

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
$ 646.00
$ 646.00 - $ 646.00
$ 646.00
$ 517.00
$ 517.00 - $ 517.00
$ 517.00
Save 20% Save %
Save 20% Save %
$ 646.00
$ 646.00 - $ 646.00
$ 646.00
$ 517.00
$ 517.00 - $ 517.00
$ 517.00

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
$ 646.00
$ 646.00 - $ 646.00
$ 646.00
$ 517.00
$ 517.00 - $ 517.00
$ 517.00
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 %
$ 646.00
$ 646.00 - $ 646.00
$ 646.00
$ 517.00
$ 517.00 - $ 517.00
$ 517.00

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
$ 646.00
$ 646.00 - $ 646.00
$ 646.00
$ 517.00
$ 517.00 - $ 517.00
$ 517.00
Save 20% Save %
Save 20% Save %
$ 646.00
$ 646.00 - $ 646.00
$ 646.00
$ 517.00
$ 517.00 - $ 517.00
$ 517.00

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
$ 646.00
$ 646.00 - $ 646.00
$ 646.00
$ 517.00
$ 517.00 - $ 517.00
$ 517.00
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 %
$ 108.00
$ 108.00 - $ 108.00
$ 108.00
$ 87.00
$ 87.00 - $ 87.00
$ 87.00

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
$ 108.00
$ 108.00 - $ 108.00
$ 108.00
$ 87.00
$ 87.00 - $ 87.00
$ 87.00
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 %
$ 600.00
$ 600.00 - $ 600.00
$ 600.00
$ 479.00
$ 479.00 - $ 479.00
$ 479.00

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
$ 600.00
$ 600.00 - $ 600.00
$ 600.00
$ 479.00
$ 479.00 - $ 479.00
$ 479.00
Save 20% Save %
Save 20% Save %
$ 600.00
$ 600.00 - $ 600.00
$ 600.00
$ 479.00
$ 479.00 - $ 479.00
$ 479.00

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
$ 600.00
$ 600.00 - $ 600.00
$ 600.00
$ 479.00
$ 479.00 - $ 479.00
$ 479.00
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 %
$ 617.00
$ 617.00 - $ 617.00
$ 617.00
$ 494.00
$ 494.00 - $ 494.00
$ 494.00

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
$ 617.00
$ 617.00 - $ 617.00
$ 617.00
$ 494.00
$ 494.00 - $ 494.00
$ 494.00
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 %
$ 725.00
$ 725.00 - $ 725.00
$ 725.00
$ 580.00
$ 580.00 - $ 580.00
$ 580.00

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
$ 725.00
$ 725.00 - $ 725.00
$ 725.00
$ 580.00
$ 580.00 - $ 580.00
$ 580.00
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 %
$ 600.00
$ 600.00 - $ 600.00
$ 600.00
$ 479.00
$ 479.00 - $ 479.00
$ 479.00

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
$ 600.00
$ 600.00 - $ 600.00
$ 600.00
$ 479.00
$ 479.00 - $ 479.00
$ 479.00
Save 20% Save %
Save 20% Save %
$ 600.00
$ 600.00 - $ 600.00
$ 600.00
$ 479.00
$ 479.00 - $ 479.00
$ 479.00

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
$ 600.00
$ 600.00 - $ 600.00
$ 600.00
$ 479.00
$ 479.00 - $ 479.00
$ 479.00
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 21% Save %
$ 131.00
$ 131.00 - $ 131.00
$ 131.00
$ 104.00
$ 104.00 - $ 104.00
$ 104.00

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
$ 131.00
$ 131.00 - $ 131.00
$ 131.00
$ 104.00
$ 104.00 - $ 104.00
$ 104.00
Save 21% Save %
Save 21% Save %
$ 131.00
$ 131.00 - $ 131.00
$ 131.00
$ 104.00
$ 104.00 - $ 104.00
$ 104.00

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
$ 131.00
$ 131.00 - $ 131.00
$ 131.00
$ 104.00
$ 104.00 - $ 104.00
$ 104.00
Save 21% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 301.00
$ 301.00 - $ 301.00
$ 301.00
$ 241.00
$ 241.00 - $ 241.00
$ 241.00

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
$ 301.00
$ 301.00 - $ 301.00
$ 301.00
$ 241.00
$ 241.00 - $ 241.00
$ 241.00
Save 20% Save %
Save 20% Save %
$ 301.00
$ 301.00 - $ 301.00
$ 301.00
$ 241.00
$ 241.00 - $ 241.00
$ 241.00

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
$ 301.00
$ 301.00 - $ 301.00
$ 301.00
$ 241.00
$ 241.00 - $ 241.00
$ 241.00
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 %
$ 578.00
$ 578.00 - $ 578.00
$ 578.00
$ 462.00
$ 462.00 - $ 462.00
$ 462.00

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
$ 578.00
$ 578.00 - $ 578.00
$ 578.00
$ 462.00
$ 462.00 - $ 462.00
$ 462.00
Save 20% Save %
Save 20% Save %
$ 578.00
$ 578.00 - $ 578.00
$ 578.00
$ 462.00
$ 462.00 - $ 462.00
$ 462.00

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
$ 578.00
$ 578.00 - $ 578.00
$ 578.00
$ 462.00
$ 462.00 - $ 462.00
$ 462.00
Save 20% Save %

Request a Quote

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