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

Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass Save 20% Save %
$ 43.49
$ 43.49 - $ 43.49
$ 43.49
$ 34.79
$ 34.79 - $ 34.79
$ 34.79

Foster FM5505, 1/2" Industrial Coupler x 3/4" Male NPT, 5 Series, Automatic, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM5505 is a Brass 1/2" industrial coupler from the Foster 5 Seri...

View full details
$ 43.49
$ 43.49 - $ 43.49
$ 43.49
$ 34.79
$ 34.79 - $ 34.79
$ 34.79
Save 20% Save %
Save 20% Save %
$ 43.49
$ 43.49 - $ 43.49
$ 43.49
$ 34.79
$ 34.79 - $ 34.79
$ 34.79

Foster FM5505, 5 Series, Industrial Coupler, Automatic, 3/4" Male NPT, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM5505 is a Brass 1/2" industrial coupler from the Foster 5 Seri...

View full details
$ 43.49
$ 43.49 - $ 43.49
$ 43.49
$ 34.79
$ 34.79 - $ 34.79
$ 34.79
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 %
$ 51.29
$ 51.29 - $ 51.29
$ 51.29
$ 41.09
$ 41.09 - $ 41.09
$ 41.09

Foster FM5505S, 1/2" Industrial Coupler x 3/4" Male NPT, 5 Series, Automatic, Steam/EPDM, Brass/SS

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM5505S is a Brass/SS 1/2" industrial coupler from the Foster 5 ...

View full details
$ 51.29
$ 51.29 - $ 51.29
$ 51.29
$ 41.09
$ 41.09 - $ 41.09
$ 41.09
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 %
$ 44.59
$ 44.59 - $ 44.59
$ 44.59
$ 35.69
$ 35.69 - $ 35.69
$ 35.69

Foster FM5605, 1/2" Industrial Coupler x 1/4" Hose ID, 5 Series, Automatic, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM5605 is a Brass 1/2" industrial coupler from the Foster 5 Seri...

View full details
$ 44.59
$ 44.59 - $ 44.59
$ 44.59
$ 35.69
$ 35.69 - $ 35.69
$ 35.69
Save 20% Save %
Save 20% Save %
$ 44.59
$ 44.59 - $ 44.59
$ 44.59
$ 35.69
$ 35.69 - $ 35.69
$ 35.69

Foster FM5605, 5 Series, Industrial Coupler, Automatic, 1/4" Hose Barb, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM5605 is a Brass 1/2" industrial coupler from the Foster 5 Seri...

View full details
$ 44.59
$ 44.59 - $ 44.59
$ 44.59
$ 35.69
$ 35.69 - $ 35.69
$ 35.69
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 %
$ 44.79
$ 44.79 - $ 44.79
$ 44.79
$ 35.89
$ 35.89 - $ 35.89
$ 35.89

Foster FM5705, 1/2" Industrial Coupler x 3/8" Hose ID, 5 Series, Automatic, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM5705 is a Brass 1/2" industrial coupler from the Foster 5 Seri...

View full details
$ 44.79
$ 44.79 - $ 44.79
$ 44.79
$ 35.89
$ 35.89 - $ 35.89
$ 35.89
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 %
$ 49.09
$ 49.09 - $ 49.09
$ 49.09
$ 39.29
$ 39.29 - $ 39.29
$ 39.29

Foster FM5705H, 1/2" Industrial Coupler x 3/8" Hose ID, 5 Series, Automatic, Heat/Viton, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM5705H is a Brass 1/2" industrial coupler from the Foster 5 Ser...

View full details
$ 49.09
$ 49.09 - $ 49.09
$ 49.09
$ 39.29
$ 39.29 - $ 39.29
$ 39.29
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 %
$ 44.09
$ 44.09 - $ 44.09
$ 44.09
$ 35.29
$ 35.29 - $ 35.29
$ 35.29

Foster FM5805, 1/2" Industrial Coupler x 1/2" Hose ID, 5 Series, Automatic, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM5805 is a Brass 1/2" industrial coupler from the Foster 5 Seri...

View full details
$ 44.09
$ 44.09 - $ 44.09
$ 44.09
$ 35.29
$ 35.29 - $ 35.29
$ 35.29
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 %
$ 49.29
$ 49.29 - $ 49.29
$ 49.29
$ 39.39
$ 39.39 - $ 39.39
$ 39.39

Foster FM5805H, 1/2" Industrial Coupler x 1/2" Hose ID, 5 Series, Automatic, Heat/Viton, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM5805H is a Brass 1/2" industrial coupler from the Foster 5 Ser...

View full details
$ 49.29
$ 49.29 - $ 49.29
$ 49.29
$ 39.39
$ 39.39 - $ 39.39
$ 39.39
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 %
$ 49.89
$ 49.89 - $ 49.89
$ 49.89
$ 39.89
$ 39.89 - $ 39.89
$ 39.89

Foster FM5805W, 1/2" Industrial Coupler x 1/2" Hose ID, 5 Series, Automatic, Water, Brass/SS

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM5805W is a Brass/SS 1/2" industrial coupler from the Foster 5 ...

View full details
$ 49.89
$ 49.89 - $ 49.89
$ 49.89
$ 39.89
$ 39.89 - $ 39.89
$ 39.89
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 %
$ 44.49
$ 44.49 - $ 44.49
$ 44.49
$ 35.59
$ 35.59 - $ 35.59
$ 35.59

Foster FM5905, 1/2" Industrial Coupler x 3/4" Hose ID, 5 Series, Automatic, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM5905 is a Brass 1/2" industrial coupler from the Foster 5 Seri...

View full details
$ 44.49
$ 44.49 - $ 44.49
$ 44.49
$ 35.59
$ 35.59 - $ 35.59
$ 35.59
Save 20% Save %
Save 20% Save %
$ 44.49
$ 44.49 - $ 44.49
$ 44.49
$ 35.59
$ 35.59 - $ 35.59
$ 35.59

Foster FM5905, 5 Series, Industrial Coupler, Automatic, 3/4" Hose Barb, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM5905 is a Brass 1/2" industrial coupler from the Foster 5 Seri...

View full details
$ 44.49
$ 44.49 - $ 44.49
$ 44.49
$ 35.59
$ 35.59 - $ 35.59
$ 35.59
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 %
$ 47.29
$ 47.29 - $ 47.29
$ 47.29
$ 37.79
$ 37.79 - $ 37.79
$ 37.79

Foster FMSD11-5, 1/2" Industrial Coupler x Reusable Hose Fitting, 3/8" ID x 3/4" OD, 5 Series, Automatic, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FMSD11-5 is a Brass 1/2" industrial coupler from the Foster 5 Se...

View full details
$ 47.29
$ 47.29 - $ 47.29
$ 47.29
$ 37.79
$ 37.79 - $ 37.79
$ 37.79
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 %
$ 48.29
$ 48.29 - $ 48.29
$ 48.29
$ 38.59
$ 38.59 - $ 38.59
$ 38.59

Foster FMSD13-5, 1/2" Industrial Coupler x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 5 Series, Automatic, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FMSD13-5 is a Brass 1/2" industrial coupler from the Foster 5 Se...

View full details
$ 48.29
$ 48.29 - $ 48.29
$ 48.29
$ 38.59
$ 38.59 - $ 38.59
$ 38.59
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 %
$ 44.99
$ 44.99 - $ 44.99
$ 44.99
$ 35.99
$ 35.99 - $ 35.99
$ 35.99

Foster FMSD7-5, 1/2" Industrial Coupler x Reusable Hose Fitting, 3/8" ID x 5/8" OD, 5 Series, Automatic, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FMSD7-5 is a Brass 1/2" industrial coupler from the Foster 5 Ser...

View full details
$ 44.99
$ 44.99 - $ 44.99
$ 44.99
$ 35.99
$ 35.99 - $ 35.99
$ 35.99
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 %
$ 49.29
$ 49.29 - $ 49.29
$ 49.29
$ 39.39
$ 39.39 - $ 39.39
$ 39.39

Foster FMSD7-5H, 1/2" Industrial Coupler x Reusable Hose Fitting, 3/8" ID x 5/8" OD, 5 Series, Automatic, Heat/Viton, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FMSD7-5H is a Brass 1/2" industrial coupler from the Foster 5 Se...

View full details
$ 49.29
$ 49.29 - $ 49.29
$ 49.29
$ 39.39
$ 39.39 - $ 39.39
$ 39.39
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 %
$ 46.19
$ 46.19 - $ 46.19
$ 46.19
$ 36.99
$ 36.99 - $ 36.99
$ 36.99

Foster FMSD9-5, 1/2" Industrial Coupler x Reusable Hose Fitting, 3/8" ID x 11/16" OD, 5 Series, Automatic, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FMSD9-5 is a Brass 1/2" industrial coupler from the Foster 5 Ser...

View full details
$ 46.19
$ 46.19 - $ 46.19
$ 46.19
$ 36.99
$ 36.99 - $ 36.99
$ 36.99
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 %
$ 59.09
$ 59.09 - $ 59.09
$ 59.09
$ 47.29
$ 47.29 - $ 47.29
$ 47.29

Foster FMSP13-5, 1/2" Industrial Coupler x Reusable Hose Fitting, 1/2" ID x 13/16" OD, 5 Series, Automatic, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FMSP13-5 is a Brass 1/2" industrial coupler from the Foster 5 Se...

View full details
$ 59.09
$ 59.09 - $ 59.09
$ 59.09
$ 47.29
$ 47.29 - $ 47.29
$ 47.29
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 %
$ 63.29
$ 63.29 - $ 63.29
$ 63.29
$ 50.69
$ 50.69 - $ 50.69
$ 50.69

Foster FMSP13-5H, 1/2" Industrial Coupler x Reusable Hose Fitting, 1/2" ID x 13/16" OD, 5 Series, Automatic, Heat/Viton, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FMSP13-5H is a Brass 1/2" industrial coupler from the Foster 5 S...

View full details
$ 63.29
$ 63.29 - $ 63.29
$ 63.29
$ 50.69
$ 50.69 - $ 50.69
$ 50.69
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 %
$ 60.29
$ 60.29 - $ 60.29
$ 60.29
$ 48.19
$ 48.19 - $ 48.19
$ 48.19

Foster FMSP15-5, 1/2" Industrial Coupler x Reusable Hose Fitting, 1/2" ID x 7/8" OD, 5 Series, Automatic, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FMSP15-5 is a Brass 1/2" industrial coupler from the Foster 5 Se...

View full details
$ 60.29
$ 60.29 - $ 60.29
$ 60.29
$ 48.19
$ 48.19 - $ 48.19
$ 48.19
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 %
$ 65.19
$ 65.19 - $ 65.19
$ 65.19
$ 52.19
$ 52.19 - $ 52.19
$ 52.19

Foster FMSP17-5, 1/2" Industrial Coupler x Reusable Hose Fitting, 1/2" ID x 15/16" OD, 5 Series, Automatic, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FMSP17-5 is a Brass 1/2" industrial coupler from the Foster 5 Se...

View full details
$ 65.19
$ 65.19 - $ 65.19
$ 65.19
$ 52.19
$ 52.19 - $ 52.19
$ 52.19
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 %
$ 67.29
$ 67.29 - $ 67.29
$ 67.29
$ 53.89
$ 53.89 - $ 53.89
$ 53.89

Foster FMSP19-5, 1/2" Industrial Coupler x Reusable Hose Fitting, 1/2" ID x 1" OD, 5 Series, Automatic, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FMSP19-5 is a Brass 1/2" industrial coupler from the Foster 5 Se...

View full details
$ 67.29
$ 67.29 - $ 67.29
$ 67.29
$ 53.89
$ 53.89 - $ 53.89
$ 53.89
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 %
$ 20.29
$ 20.29 - $ 20.29
$ 20.29
$ 16.19
$ 16.19 - $ 16.19
$ 16.19

Foster PD11-5, 1/2" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 3/4" OD, 5 Series, Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster PD11-5 is a Steel 1/2" industrial plug from the Foster 5 Series ...

View full details
$ 20.29
$ 20.29 - $ 20.29
$ 20.29
$ 16.19
$ 16.19 - $ 16.19
$ 16.19
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 %
$ 39.99
$ 39.99 - $ 39.99
$ 39.99
$ 31.99
$ 31.99 - $ 31.99
$ 31.99

Foster PD13-5, 1/2" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 5 Series, Steel

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster PD13-5 is a Steel 1/2" industrial plug from the Foster 5 Series ...

View full details
$ 39.99
$ 39.99 - $ 39.99
$ 39.99
$ 31.99
$ 31.99 - $ 31.99
$ 31.99
Save 20% Save %

Request a Quote

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