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

Foster ISO-B Series Couplers

Foster ISO-B (FHK) Series hydraulic quick couplers and plugs, compatible with ISO 7241-1 Series B — the most widely used industrial hydraulic interchange. Two-way shut-off seals both halves at disconnect to prevent fluid loss and air inclusion. Manual sleeve connection at zero pressure. Body sizes 1/8" to 1", in RoHS-plated steel, brass, and 303/316 stainless with Buna-N seals.

Filters

Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass Save 20% Save %
$ 98.59
$ 98.59 - $ 98.59
$ 98.59
$ 78.89
$ 78.89 - $ 78.89
$ 78.89

Foster H6S-102, 3/4" ISO-B Hydraulic Coupler x 3/4" Female NPT, ISO-B Series, Neoprene Seal, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H6S-102 is a steel 3/4" coupler in the FH...

View full details
$ 98.59
$ 98.59 - $ 98.59
$ 98.59
$ 78.89
$ 78.89 - $ 78.89
$ 78.89
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 %
$ 96.69
$ 96.69 - $ 96.69
$ 96.69
$ 77.39
$ 77.39 - $ 77.39
$ 77.39

Foster H6S-103, 3/4" ISO-B Hydraulic Coupler x 3/4" Female NPT, ISO-B Series, EPDM Seal, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H6S-103 is a steel 3/4" coupler in the FH...

View full details
$ 96.69
$ 96.69 - $ 96.69
$ 96.69
$ 77.39
$ 77.39 - $ 77.39
$ 77.39
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 %
$ 257.79
$ 257.79 - $ 257.79
$ 257.79
$ 206.19
$ 206.19 - $ 206.19
$ 206.19

Foster H6S/S, 3/4" ISO-B Hydraulic Coupler x 3/4" Female NPT, ISO-B Series, 303 Stainless Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H6S/S is a 303 stainless 3/4" coupler in ...

View full details
$ 257.79
$ 257.79 - $ 257.79
$ 257.79
$ 206.19
$ 206.19 - $ 206.19
$ 206.19
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 %
$ 273.49
$ 273.49 - $ 273.49
$ 273.49
$ 218.79
$ 218.79 - $ 218.79
$ 218.79

Foster H6S/S-101, 3/4" ISO-B Hydraulic Coupler x 3/4" Female NPT, ISO-B Series, Viton Seal, 303 Stainless Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H6S/S-101 is a 303 stainless 3/4" coupler...

View full details
$ 273.49
$ 273.49 - $ 273.49
$ 273.49
$ 218.79
$ 218.79 - $ 218.79
$ 218.79
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 %
$ 270.69
$ 270.69 - $ 270.69
$ 270.69
$ 216.59
$ 216.59 - $ 216.59
$ 216.59

Foster H6S/S-103, 3/4" ISO-B Hydraulic Coupler x 3/4" Female NPT, ISO-B Series, EPDM Seal, 303 Stainless Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H6S/S-103 is a 303 stainless 3/4" coupler...

View full details
$ 270.69
$ 270.69 - $ 270.69
$ 270.69
$ 216.59
$ 216.59 - $ 216.59
$ 216.59
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 %
$ 262.79
$ 262.79 - $ 262.79
$ 262.79
$ 210.19
$ 210.19 - $ 210.19
$ 210.19

Foster H6S/SLV, 3/4" ISO-B Hydraulic Coupler x 3/4" Female NPT, ISO-B Series, Less Valve, 303 Stainless Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H6S/SLV is a 303 stainless 3/4" coupler i...

View full details
$ 262.79
$ 262.79 - $ 262.79
$ 262.79
$ 210.19
$ 210.19 - $ 210.19
$ 210.19
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 %
$ 91.69
$ 91.69 - $ 91.69
$ 91.69
$ 73.39
$ 73.39 - $ 73.39
$ 73.39

Foster H6S12, 3/4" ISO-B Hydraulic Coupler x 1-1/16"-12 SAE, ISO-B Series, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H6S12 is a steel 3/4" coupler in the FHK ...

View full details
$ 91.69
$ 91.69 - $ 91.69
$ 91.69
$ 73.39
$ 73.39 - $ 73.39
$ 73.39
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 %
$ 89.79
$ 89.79 - $ 89.79
$ 89.79
$ 71.79
$ 71.79 - $ 71.79
$ 71.79

Foster H6SLV, 3/4" ISO-B Hydraulic Coupler x 3/4" Female NPT, ISO-B Series, Less Valve, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H6SLV is a steel 3/4" coupler in the FHK ...

View full details
$ 89.79
$ 89.79 - $ 89.79
$ 89.79
$ 71.79
$ 71.79 - $ 71.79
$ 71.79
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 %
$ 171.09
$ 171.09 - $ 171.09
$ 171.09
$ 136.89
$ 136.89 - $ 136.89
$ 136.89

Foster H8B, 1" ISO-B Hydraulic Coupler x 1" Female NPT, ISO-B Series, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H8B is a brass 1" coupler in the FHK Seri...

View full details
$ 171.09
$ 171.09 - $ 171.09
$ 171.09
$ 136.89
$ 136.89 - $ 136.89
$ 136.89
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 %
$ 189.39
$ 189.39 - $ 189.39
$ 189.39
$ 151.59
$ 151.59 - $ 151.59
$ 151.59

Foster H8B-101, 1" ISO-B Hydraulic Coupler x 1" Female NPT, ISO-B Series, Viton Seal, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H8B-101 is a brass 1" coupler in the FHK ...

View full details
$ 189.39
$ 189.39 - $ 189.39
$ 189.39
$ 151.59
$ 151.59 - $ 151.59
$ 151.59
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 %
$ 191.79
$ 191.79 - $ 191.79
$ 191.79
$ 153.39
$ 153.39 - $ 153.39
$ 153.39

Foster H8B-103, 1" ISO-B Hydraulic Coupler x 1" Female NPT, ISO-B Series, EPDM Seal, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H8B-103 is a brass 1" coupler in the FHK ...

View full details
$ 191.79
$ 191.79 - $ 191.79
$ 191.79
$ 153.39
$ 153.39 - $ 153.39
$ 153.39
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 %
$ 108.29
$ 108.29 - $ 108.29
$ 108.29
$ 86.59
$ 86.59 - $ 86.59
$ 86.59

Foster H8S, 1" ISO-B Hydraulic Coupler x 1" Female NPT, ISO-B Series, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H8S is a steel 1" coupler in the FHK Seri...

View full details
$ 108.29
$ 108.29 - $ 108.29
$ 108.29
$ 86.59
$ 86.59 - $ 86.59
$ 86.59
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 %
$ 125.89
$ 125.89 - $ 125.89
$ 125.89
$ 100.79
$ 100.79 - $ 100.79
$ 100.79

Foster H8S-101, 1" ISO-B Hydraulic Coupler x 1" Female NPT, ISO-B Series, Viton Seal, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H8S-101 is a steel 1" coupler in the FHK ...

View full details
$ 125.89
$ 125.89 - $ 125.89
$ 125.89
$ 100.79
$ 100.79 - $ 100.79
$ 100.79
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 %
$ 381.59
$ 381.59 - $ 381.59
$ 381.59
$ 305.29
$ 305.29 - $ 305.29
$ 305.29

Foster H8S/S, 1" ISO-B Hydraulic Coupler x 1" Female NPT, ISO-B Series, 303 Stainless Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H8S/S is a 303 stainless 1" coupler in th...

View full details
$ 381.59
$ 381.59 - $ 381.59
$ 381.59
$ 305.29
$ 305.29 - $ 305.29
$ 305.29
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 %
$ 404.59
$ 404.59 - $ 404.59
$ 404.59
$ 323.69
$ 323.69 - $ 323.69
$ 323.69

Foster H8S/S-101, 1" ISO-B Hydraulic Coupler x 1" Female NPT, ISO-B Series, Viton Seal, 303 Stainless Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H8S/S-101 is a 303 stainless 1" coupler i...

View full details
$ 404.59
$ 404.59 - $ 404.59
$ 404.59
$ 323.69
$ 323.69 - $ 323.69
$ 323.69
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 %
$ 400.29
$ 400.29 - $ 400.29
$ 400.29
$ 320.19
$ 320.19 - $ 320.19
$ 320.19

Foster H8S/S-103, 1" ISO-B Hydraulic Coupler x 1" Female NPT, ISO-B Series, EPDM Seal, 303 Stainless Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H8S/S-103 is a 303 stainless 1" coupler i...

View full details
$ 400.29
$ 400.29 - $ 400.29
$ 400.29
$ 320.19
$ 320.19 - $ 320.19
$ 320.19
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 %
$ 125.19
$ 125.19 - $ 125.19
$ 125.19
$ 100.19
$ 100.19 - $ 100.19
$ 100.19

Foster H8S16, 1" ISO-B Hydraulic Coupler x 15/16"-12 SAE, ISO-B Series, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H8S16 is a steel 1" coupler in the FHK Se...

View full details
$ 125.19
$ 125.19 - $ 125.19
$ 125.19
$ 100.19
$ 100.19 - $ 100.19
$ 100.19
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 %
$ 110.39
$ 110.39 - $ 110.39
$ 110.39
$ 88.29
$ 88.29 - $ 88.29
$ 88.29

Foster H8SLV, 1" ISO-B Hydraulic Coupler x 1" Female NPT, ISO-B Series, Less Valve, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H8SLV is a steel 1" coupler in the FHK Se...

View full details
$ 110.39
$ 110.39 - $ 110.39
$ 110.39
$ 88.29
$ 88.29 - $ 88.29
$ 88.29
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 %
$ 9.59
$ 9.59 - $ 9.59
$ 9.59
$ 7.69
$ 7.69 - $ 7.69
$ 7.69

Foster K1B, 1/8" ISO-B Hydraulic Plug x 1/8" Female NPT, ISO-B Series, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K1B is a brass 1/8" plug in the FHK Serie...

View full details
$ 9.59
$ 9.59 - $ 9.59
$ 9.59
$ 7.69
$ 7.69 - $ 7.69
$ 7.69
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 %
$ 14.09
$ 14.09 - $ 14.09
$ 14.09
$ 11.29
$ 11.29 - $ 11.29
$ 11.29

Foster K1B-101, 1/8" ISO-B Hydraulic Plug x 1/8" Female NPT, ISO-B Series, Viton Seal, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K1B-101 is a brass 1/8" plug in the FHK S...

View full details
$ 14.09
$ 14.09 - $ 14.09
$ 14.09
$ 11.29
$ 11.29 - $ 11.29
$ 11.29
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 %
$ 13.29
$ 13.29 - $ 13.29
$ 13.29
$ 10.69
$ 10.69 - $ 10.69
$ 10.69

Foster K1B-103, 1/8" ISO-B Hydraulic Plug x 1/8" Female NPT, ISO-B Series, EPDM Seal, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K1B-103 is a brass 1/8" plug in the FHK S...

View full details
$ 13.29
$ 13.29 - $ 13.29
$ 13.29
$ 10.69
$ 10.69 - $ 10.69
$ 10.69
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 %
$ 10.59
$ 10.59 - $ 10.59
$ 10.59
$ 8.49
$ 8.49 - $ 8.49
$ 8.49

Foster K1BLV, 1/8" ISO-B Hydraulic Plug x 1/8" Female NPT, ISO-B Series, Less Valve, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K1BLV is a brass 1/8" plug in the FHK Ser...

View full details
$ 10.59
$ 10.59 - $ 10.59
$ 10.59
$ 8.49
$ 8.49 - $ 8.49
$ 8.49
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 %
$ 8.49
$ 8.49 - $ 8.49
$ 8.49
$ 6.79
$ 6.79 - $ 6.79
$ 6.79

Foster K1S, 1/8" ISO-B Hydraulic Plug x 1/8" Female NPT, ISO-B Series, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K1S is a steel 1/8" plug in the FHK Serie...

View full details
$ 8.49
$ 8.49 - $ 8.49
$ 8.49
$ 6.79
$ 6.79 - $ 6.79
$ 6.79
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 %
$ 11.99
$ 11.99 - $ 11.99
$ 11.99
$ 9.59
$ 9.59 - $ 9.59
$ 9.59

Foster K1S-101, 1/8" ISO-B Hydraulic Plug x 1/8" Female NPT, ISO-B Series, Viton Seal, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K1S-101 is a steel 1/8" plug in the FHK S...

View full details
$ 11.99
$ 11.99 - $ 11.99
$ 11.99
$ 9.59
$ 9.59 - $ 9.59
$ 9.59
Save 20% Save %

Request a Quote

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