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 %
$ 43.39
$ 43.39 - $ 43.39
$ 43.39
$ 34.69
$ 34.69 - $ 34.69
$ 34.69

Foster H3S-103, 3/8" ISO-B Hydraulic Coupler x 3/8" 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 H3S-103 is a steel 3/8" coupler in the FH...

View full details
$ 43.39
$ 43.39 - $ 43.39
$ 43.39
$ 34.69
$ 34.69 - $ 34.69
$ 34.69
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 %
$ 45.39
$ 45.39 - $ 45.39
$ 45.39
$ 36.39
$ 36.39 - $ 36.39
$ 36.39

Foster H3S-104, 3/8" ISO-B Hydraulic Coupler x 3/8" Female NPT, ISO-B Series, Silicone Seal, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H3S-104 is a steel 3/8" coupler in the FH...

View full details
$ 45.39
$ 45.39 - $ 45.39
$ 45.39
$ 36.39
$ 36.39 - $ 36.39
$ 36.39
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 %
$ 90.09
$ 90.09 - $ 90.09
$ 90.09
$ 72.09
$ 72.09 - $ 72.09
$ 72.09

Foster H3S/S, 3/8" ISO-B Hydraulic Coupler x 3/8" 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 H3S/S is a 303 stainless 3/8" coupler in ...

View full details
$ 90.09
$ 90.09 - $ 90.09
$ 90.09
$ 72.09
$ 72.09 - $ 72.09
$ 72.09
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 %
$ 95.49
$ 95.49 - $ 95.49
$ 95.49
$ 76.39
$ 76.39 - $ 76.39
$ 76.39

Foster H3S/S-101, 3/8" ISO-B Hydraulic Coupler x 3/8" 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 H3S/S-101 is a 303 stainless 3/8" coupler...

View full details
$ 95.49
$ 95.49 - $ 95.49
$ 95.49
$ 76.39
$ 76.39 - $ 76.39
$ 76.39
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 %
$ 44.89
$ 44.89 - $ 44.89
$ 44.89
$ 35.89
$ 35.89 - $ 35.89
$ 35.89

Foster H3S8, 3/8" ISO-B Hydraulic Coupler x 3/4"-16 SAE, ISO-B Series, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H3S8 is a steel 3/8" coupler in the FHK S...

View full details
$ 44.89
$ 44.89 - $ 44.89
$ 44.89
$ 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 %
$ 63.79
$ 63.79 - $ 63.79
$ 63.79
$ 50.99
$ 50.99 - $ 50.99
$ 50.99

Foster H4B, 1/2" ISO-B Hydraulic Coupler x 1/2" Female NPT, ISO-B Series, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H4B is a brass 1/2" coupler in the FHK Se...

View full details
$ 63.79
$ 63.79 - $ 63.79
$ 63.79
$ 50.99
$ 50.99 - $ 50.99
$ 50.99
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 %
$ 76.19
$ 76.19 - $ 76.19
$ 76.19
$ 60.99
$ 60.99 - $ 60.99
$ 60.99

Foster H4B-101, 1/2" ISO-B Hydraulic Coupler x 1/2" 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 H4B-101 is a brass 1/2" coupler in the FH...

View full details
$ 76.19
$ 76.19 - $ 76.19
$ 76.19
$ 60.99
$ 60.99 - $ 60.99
$ 60.99
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 %
$ 71.49
$ 71.49 - $ 71.49
$ 71.49
$ 57.19
$ 57.19 - $ 57.19
$ 57.19

Foster H4B-102, 1/2" ISO-B Hydraulic Coupler x 1/2" Female NPT, ISO-B Series, Neoprene Seal, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H4B-102 is a brass 1/2" coupler in the FH...

View full details
$ 71.49
$ 71.49 - $ 71.49
$ 71.49
$ 57.19
$ 57.19 - $ 57.19
$ 57.19
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 %
$ 72.29
$ 72.29 - $ 72.29
$ 72.29
$ 57.89
$ 57.89 - $ 57.89
$ 57.89

Foster H4B-103, 1/2" ISO-B Hydraulic Coupler x 1/2" 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 H4B-103 is a brass 1/2" coupler in the FH...

View full details
$ 72.29
$ 72.29 - $ 72.29
$ 72.29
$ 57.89
$ 57.89 - $ 57.89
$ 57.89
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 %
$ 12.29
$ 12.29 - $ 12.29
$ 12.29
$ 9.89
$ 9.89 - $ 9.89
$ 9.89

Foster H4DP, 1/2" ISO-B Dust Plug, FHK Series, Aluminum

The Foster H4DP is a 1/2" ISO-B dust plug in aluminum for FHK / ISO 7241-1 Series B hydraulic quick couplings. It protects plug (male half) from di...

View full details
$ 12.29
$ 12.29 - $ 12.29
$ 12.29
$ 9.89
$ 9.89 - $ 9.89
$ 9.89
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 %
$ 49.99
$ 49.99 - $ 49.99
$ 49.99
$ 39.99
$ 39.99 - $ 39.99
$ 39.99

Foster H4S, 1/2" ISO-B Hydraulic Coupler x 1/2" Female NPT, ISO-B Series, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H4S is a steel 1/2" coupler in the FHK Se...

View full details
$ 49.99
$ 49.99 - $ 49.99
$ 49.99
$ 39.99
$ 39.99 - $ 39.99
$ 39.99
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 %
$ 57.99
$ 57.99 - $ 57.99
$ 57.99
$ 46.39
$ 46.39 - $ 46.39
$ 46.39

Foster H4S-101, 1/2" ISO-B Hydraulic Coupler x 1/2" 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 H4S-101 is a steel 1/2" coupler in the FH...

View full details
$ 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 %
$ 55.99
$ 55.99 - $ 55.99
$ 55.99
$ 44.79
$ 44.79 - $ 44.79
$ 44.79

Foster H4S-103, 1/2" ISO-B Hydraulic Coupler x 1/2" 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 H4S-103 is a steel 1/2" coupler in the FH...

View full details
$ 55.99
$ 55.99 - $ 55.99
$ 55.99
$ 44.79
$ 44.79 - $ 44.79
$ 44.79
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 %
$ 158.49
$ 158.49 - $ 158.49
$ 158.49
$ 126.79
$ 126.79 - $ 126.79
$ 126.79

Foster H4S/S, 1/2" ISO-B Hydraulic Coupler x 1/2" 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 H4S/S is a 303 stainless 1/2" coupler in ...

View full details
$ 158.49
$ 158.49 - $ 158.49
$ 158.49
$ 126.79
$ 126.79 - $ 126.79
$ 126.79
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 %
$ 164.29
$ 164.29 - $ 164.29
$ 164.29
$ 131.39
$ 131.39 - $ 131.39
$ 131.39

Foster H4S/S-101, 1/2" ISO-B Hydraulic Coupler x 1/2" 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 H4S/S-101 is a 303 stainless 1/2" coupler...

View full details
$ 164.29
$ 164.29 - $ 164.29
$ 164.29
$ 131.39
$ 131.39 - $ 131.39
$ 131.39
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 %
$ 166.59
$ 166.59 - $ 166.59
$ 166.59
$ 133.29
$ 133.29 - $ 133.29
$ 133.29

Foster H4S/S-103, 1/2" ISO-B Hydraulic Coupler x 1/2" 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 H4S/S-103 is a 303 stainless 1/2" coupler...

View full details
$ 166.59
$ 166.59 - $ 166.59
$ 166.59
$ 133.29
$ 133.29 - $ 133.29
$ 133.29
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 %
$ 61.79
$ 61.79 - $ 61.79
$ 61.79
$ 49.39
$ 49.39 - $ 49.39
$ 49.39

Foster H4S10, 1/2" ISO-B Hydraulic Coupler x 7/8"-14 SAE, ISO-B Series, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H4S10 is a steel 1/2" coupler in the FHK ...

View full details
$ 61.79
$ 61.79 - $ 61.79
$ 61.79
$ 49.39
$ 49.39 - $ 49.39
$ 49.39
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 %
$ 112.39
$ 112.39 - $ 112.39
$ 112.39
$ 89.89
$ 89.89 - $ 89.89
$ 89.89

Foster H6B, 3/4" ISO-B Hydraulic Coupler x 3/4" Female NPT, ISO-B Series, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H6B is a brass 3/4" coupler in the FHK Se...

View full details
$ 112.39
$ 112.39 - $ 112.39
$ 112.39
$ 89.89
$ 89.89 - $ 89.89
$ 89.89
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 %
$ 130.79
$ 130.79 - $ 130.79
$ 130.79
$ 104.69
$ 104.69 - $ 104.69
$ 104.69

Foster H6B-101, 3/4" ISO-B Hydraulic Coupler x 3/4" 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 H6B-101 is a brass 3/4" coupler in the FH...

View full details
$ 130.79
$ 130.79 - $ 130.79
$ 130.79
$ 104.69
$ 104.69 - $ 104.69
$ 104.69
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 %
$ 122.79
$ 122.79 - $ 122.79
$ 122.79
$ 98.29
$ 98.29 - $ 98.29
$ 98.29

Foster H6B-103, 3/4" ISO-B Hydraulic Coupler x 3/4" 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 H6B-103 is a brass 3/4" coupler in the FH...

View full details
$ 122.79
$ 122.79 - $ 122.79
$ 122.79
$ 98.29
$ 98.29 - $ 98.29
$ 98.29
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 %
$ 128.69
$ 128.69 - $ 128.69
$ 128.69
$ 102.99
$ 102.99 - $ 102.99
$ 102.99

Foster H6B-104, 3/4" ISO-B Hydraulic Coupler x 3/4" Female NPT, ISO-B Series, Silicone Seal, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster H6B-104 is a brass 3/4" coupler in the FH...

View full details
$ 128.69
$ 128.69 - $ 128.69
$ 128.69
$ 102.99
$ 102.99 - $ 102.99
$ 102.99
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 %
$ 15.99
$ 15.99 - $ 15.99
$ 15.99
$ 12.79
$ 12.79 - $ 12.79
$ 12.79

Foster H6DP, 3/4" ISO-B Dust Plug, FHK Series, Aluminum

The Foster H6DP is a 3/4" ISO-B dust plug in aluminum for FHK / ISO 7241-1 Series B hydraulic quick couplings. It protects plug (male half) from di...

View full details
$ 15.99
$ 15.99 - $ 15.99
$ 15.99
$ 12.79
$ 12.79 - $ 12.79
$ 12.79
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 %
$ 88.09
$ 88.09 - $ 88.09
$ 88.09
$ 70.49
$ 70.49 - $ 70.49
$ 70.49

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

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

View full details
$ 88.09
$ 88.09 - $ 88.09
$ 88.09
$ 70.49
$ 70.49 - $ 70.49
$ 70.49
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 %
$ 99.39
$ 99.39 - $ 99.39
$ 99.39
$ 79.59
$ 79.59 - $ 79.59
$ 79.59

Foster H6S-101, 3/4" ISO-B Hydraulic Coupler x 3/4" 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 H6S-101 is a steel 3/4" coupler in the FH...

View full details
$ 99.39
$ 99.39 - $ 99.39
$ 99.39
$ 79.59
$ 79.59 - $ 79.59
$ 79.59
Save 20% Save %

Request a Quote

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