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Hydraulic Quick Couplers

Hydraulic quick couplers join high-pressure fluid lines with a secure, leak-free connection. This collection covers ISO-B, ISO-A, flush face, and specialty hydraulic couplers and plugs in steel, brass, and stainless. Filter by series, body size, thread, and material to match your hydraulic system.

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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass Save 20% Save %
$ 317.00
$ 317.00 - $ 317.00
$ 317.00
$ 254.00
$ 254.00 - $ 254.00
$ 254.00

Foster K3S, 3/8" ISO-B Hydraulic Plug x 3/8" Female NPT, ISO-B Series, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K3S is a steel 3/8" plug in the FHK Serie...

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$ 317.00
$ 317.00 - $ 317.00
$ 317.00
$ 254.00
$ 254.00 - $ 254.00
$ 254.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass Save 20% Save %
$ 425.00
$ 425.00 - $ 425.00
$ 425.00
$ 342.00
$ 342.00 - $ 342.00
$ 342.00

Foster K3B-103, 3/8" ISO-B Hydraulic Plug x 3/8" 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 K3B-103 is a brass 3/8" plug in the FHK S...

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$ 425.00
$ 425.00 - $ 425.00
$ 425.00
$ 342.00
$ 342.00 - $ 342.00
$ 342.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass Save 20% Save %
$ 454.00
$ 454.00 - $ 454.00
$ 454.00
$ 364.00
$ 364.00 - $ 364.00
$ 364.00

Foster K3B-102, 3/8" ISO-B Hydraulic Plug x 3/8" 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 K3B-102 is a brass 3/8" plug in the FHK S...

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$ 454.00
$ 454.00 - $ 454.00
$ 454.00
$ 364.00
$ 364.00 - $ 364.00
$ 364.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass Save 20% Save %
$ 465.00
$ 465.00 - $ 465.00
$ 465.00
$ 374.00
$ 374.00 - $ 374.00
$ 374.00

Foster K3B-101, 3/8" ISO-B Hydraulic Plug x 3/8" 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 K3B-101 is a brass 3/8" plug in the FHK S...

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$ 465.00
$ 465.00 - $ 465.00
$ 465.00
$ 374.00
$ 374.00 - $ 374.00
$ 374.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 347.00
$ 347.00 - $ 347.00
$ 347.00
$ 279.00
$ 279.00 - $ 279.00
$ 279.00

Foster K3B, 3/8" ISO-B Hydraulic Plug x 3/8" Female NPT, ISO-B Series, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K3B is a brass 3/8" plug in the FHK Serie...

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$ 347.00
$ 347.00 - $ 347.00
$ 347.00
$ 279.00
$ 279.00 - $ 279.00
$ 279.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 220.00
$ 220.00 - $ 220.00
$ 220.00
$ 176.00
$ 176.00 - $ 176.00
$ 176.00

Foster K2SLV, 1/4" ISO-B Hydraulic Plug x 1/4" 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 K2SLV is a steel 1/4" plug in the FHK Ser...

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$ 220.00
$ 220.00 - $ 220.00
$ 220.00
$ 176.00
$ 176.00 - $ 176.00
$ 176.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 311.00
$ 311.00 - $ 311.00
$ 311.00
$ 248.00
$ 248.00 - $ 248.00
$ 248.00

Foster K2S6, 1/4" ISO-B Hydraulic Plug x 9/16"-18 SAE, ISO-B Series, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K2S6 is a steel 1/4" plug in the FHK Seri...

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$ 311.00
$ 311.00 - $ 311.00
$ 311.00
$ 248.00
$ 248.00 - $ 248.00
$ 248.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 284.00
$ 284.00 - $ 284.00
$ 284.00
$ 227.00
$ 227.00 - $ 227.00
$ 227.00

Foster K2S-104, 1/4" ISO-B Hydraulic Plug x 1/4" 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 K2S-104 is a steel 1/4" plug in the FHK S...

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$ 284.00
$ 284.00 - $ 284.00
$ 284.00
$ 227.00
$ 227.00 - $ 227.00
$ 227.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 277.00
$ 277.00 - $ 277.00
$ 277.00
$ 221.00
$ 221.00 - $ 221.00
$ 221.00

Foster K2S-103, 1/4" ISO-B Hydraulic Plug x 1/4" 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 K2S-103 is a steel 1/4" plug in the FHK S...

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$ 277.00
$ 277.00 - $ 277.00
$ 277.00
$ 221.00
$ 221.00 - $ 221.00
$ 221.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 281.00
$ 281.00 - $ 281.00
$ 281.00
$ 225.00
$ 225.00 - $ 225.00
$ 225.00

Foster K2S-101, 1/4" ISO-B Hydraulic Plug x 1/4" 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 K2S-101 is a steel 1/4" plug in the FHK S...

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$ 281.00
$ 281.00 - $ 281.00
$ 281.00
$ 225.00
$ 225.00 - $ 225.00
$ 225.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 486.00
$ 486.00 - $ 486.00
$ 486.00
$ 389.00
$ 389.00 - $ 389.00
$ 389.00

Foster K2S/SLV, 1/4" ISO-B Hydraulic Plug x 1/4" 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 K2S/SLV is a 303 stainless 1/4" plug in t...

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$ 486.00
$ 486.00 - $ 486.00
$ 486.00
$ 389.00
$ 389.00 - $ 389.00
$ 389.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 551.00
$ 551.00 - $ 551.00
$ 551.00
$ 443.00
$ 443.00 - $ 443.00
$ 443.00

Foster K2S/S-104, 1/4" ISO-B Hydraulic Plug x 1/4" Female NPT, ISO-B Series, Silicone Seal, 303 Stainless Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K2S/S-104 is a 303 stainless 1/4" plug in...

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$ 551.00
$ 551.00 - $ 551.00
$ 551.00
$ 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 %
$ 542.00
$ 542.00 - $ 542.00
$ 542.00
$ 435.00
$ 435.00 - $ 435.00
$ 435.00

Foster K2S/S-103, 1/4" ISO-B Hydraulic Plug x 1/4" 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 K2S/S-103 is a 303 stainless 1/4" plug in...

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$ 542.00
$ 542.00 - $ 542.00
$ 542.00
$ 435.00
$ 435.00 - $ 435.00
$ 435.00
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 546.00
$ 546.00 - $ 546.00
$ 546.00
$ 437.00
$ 437.00 - $ 437.00
$ 437.00

Foster K2S/S-101, 1/4" ISO-B Hydraulic Plug x 1/4" 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 K2S/S-101 is a 303 stainless 1/4" plug in...

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$ 546.00
$ 546.00 - $ 546.00
$ 546.00
$ 437.00
$ 437.00 - $ 437.00
$ 437.00
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 477.00
$ 477.00 - $ 477.00
$ 477.00
$ 382.00
$ 382.00 - $ 382.00
$ 382.00

Foster K2S/S, 1/4" ISO-B Hydraulic Plug x 1/4" 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 K2S/S is a 303 stainless 1/4" plug in the...

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$ 477.00
$ 477.00 - $ 477.00
$ 477.00
$ 382.00
$ 382.00 - $ 382.00
$ 382.00
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 %
$ 216.00
$ 216.00 - $ 216.00
$ 216.00
$ 174.00
$ 174.00 - $ 174.00
$ 174.00

Foster K2S, 1/4" ISO-B Hydraulic Plug x 1/4" Female NPT, ISO-B Series, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K2S is a steel 1/4" plug in the FHK Serie...

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$ 216.00
$ 216.00 - $ 216.00
$ 216.00
$ 174.00
$ 174.00 - $ 174.00
$ 174.00
Save 19% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 19% Save %
$ 263.00
$ 263.00 - $ 263.00
$ 263.00
$ 212.00
$ 212.00 - $ 212.00
$ 212.00

Foster K2BLV, 1/4" ISO-B Hydraulic Plug x 1/4" 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 K2BLV is a brass 1/4" plug in the FHK Ser...

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$ 263.00
$ 263.00 - $ 263.00
$ 263.00
$ 212.00
$ 212.00 - $ 212.00
$ 212.00
Save 19% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 19% Save %
$ 349.00
$ 349.00 - $ 349.00
$ 349.00
$ 281.00
$ 281.00 - $ 281.00
$ 281.00

Foster K2B-104, 1/4" ISO-B Hydraulic Plug x 1/4" 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 K2B-104 is a brass 1/4" plug in the FHK S...

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$ 349.00
$ 349.00 - $ 349.00
$ 349.00
$ 281.00
$ 281.00 - $ 281.00
$ 281.00
Save 19% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 322.00
$ 322.00 - $ 322.00
$ 322.00
$ 258.00
$ 258.00 - $ 258.00
$ 258.00

Foster K2B-103, 1/4" ISO-B Hydraulic Plug x 1/4" 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 K2B-103 is a brass 1/4" plug in the FHK S...

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$ 322.00
$ 322.00 - $ 322.00
$ 322.00
$ 258.00
$ 258.00 - $ 258.00
$ 258.00
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 %
$ 338.00
$ 338.00 - $ 338.00
$ 338.00
$ 269.00
$ 269.00 - $ 269.00
$ 269.00

Foster K2B-102, 1/4" ISO-B Hydraulic Plug x 1/4" 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 K2B-102 is a brass 1/4" plug in the FHK S...

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$ 338.00
$ 338.00 - $ 338.00
$ 338.00
$ 269.00
$ 269.00 - $ 269.00
$ 269.00
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 %
$ 338.00
$ 338.00 - $ 338.00
$ 338.00
$ 271.00
$ 271.00 - $ 271.00
$ 271.00

Foster K2B-101, 1/4" ISO-B Hydraulic Plug x 1/4" 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 K2B-101 is a brass 1/4" plug in the FHK S...

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$ 338.00
$ 338.00 - $ 338.00
$ 338.00
$ 271.00
$ 271.00 - $ 271.00
$ 271.00
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 250.00
$ 250.00 - $ 250.00
$ 250.00
$ 200.00
$ 200.00 - $ 200.00
$ 200.00

Foster K2B, 1/4" ISO-B Hydraulic Plug x 1/4" Female NPT, ISO-B Series, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K2B is a brass 1/4" plug in the FHK Serie...

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$ 250.00
$ 250.00 - $ 250.00
$ 250.00
$ 200.00
$ 200.00 - $ 200.00
$ 200.00
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 191.00
$ 191.00 - $ 191.00
$ 191.00
$ 153.00
$ 153.00 - $ 153.00
$ 153.00

Foster K1S4, 1/8" ISO-B Hydraulic Plug x 7/16"-20 SAE, ISO-B Series, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster K1S4 is a steel 1/8" plug in the FHK Seri...

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$ 191.00
$ 191.00 - $ 191.00
$ 191.00
$ 153.00
$ 153.00 - $ 153.00
$ 153.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 229.00
$ 229.00 - $ 229.00
$ 229.00
$ 183.00
$ 183.00 - $ 183.00
$ 183.00

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...

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$ 229.00
$ 229.00 - $ 229.00
$ 229.00
$ 183.00
$ 183.00 - $ 183.00
$ 183.00
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