Skip to content

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 %
$ 1,829.00
$ 1,829.00 - $ 1,829.00
$ 1,829.00
$ 1,464.00
$ 1,464.00 - $ 1,464.00
$ 1,464.00

Foster BLH3S/S, 3/8" ISO-B Hydraulic Coupler x 3/8" Female NPT, ISO-B Series, Ball Lock, 303 Stainless Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster BLH3S/S is a 303 stainless 3/8" coupler i...

View full details
$ 1,829.00
$ 1,829.00 - $ 1,829.00
$ 1,829.00
$ 1,464.00
$ 1,464.00 - $ 1,464.00
$ 1,464.00
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 %
$ 953.00
$ 953.00 - $ 953.00
$ 953.00
$ 762.00
$ 762.00 - $ 762.00
$ 762.00

Foster BLH3S8, 3/8" ISO-B Hydraulic Coupler x 3/4"-16 SAE, ISO-B Series, Ball Lock, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster BLH3S8 is a steel 3/8" coupler in the FHK...

View full details
$ 953.00
$ 953.00 - $ 953.00
$ 953.00
$ 762.00
$ 762.00 - $ 762.00
$ 762.00
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 %
$ 1,378.00
$ 1,378.00 - $ 1,378.00
$ 1,378.00
$ 1,102.00
$ 1,102.00 - $ 1,102.00
$ 1,102.00

Foster BLH4B, 1/2" ISO-B Hydraulic Coupler x 1/2" Female NPT, ISO-B Series, Ball Lock, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster BLH4B is a brass 1/2" coupler in the FHK ...

View full details
$ 1,378.00
$ 1,378.00 - $ 1,378.00
$ 1,378.00
$ 1,102.00
$ 1,102.00 - $ 1,102.00
$ 1,102.00
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 %
$ 1,073.00
$ 1,073.00 - $ 1,073.00
$ 1,073.00
$ 858.00
$ 858.00 - $ 858.00
$ 858.00

Foster BLH4S, 1/2" ISO-B Hydraulic Coupler x 1/2" Female NPT, ISO-B Series, Ball Lock, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster BLH4S is a steel 1/2" coupler in the FHK ...

View full details
$ 1,073.00
$ 1,073.00 - $ 1,073.00
$ 1,073.00
$ 858.00
$ 858.00 - $ 858.00
$ 858.00
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 %
$ 3,076.00
$ 3,076.00 - $ 3,076.00
$ 3,076.00
$ 2,462.00
$ 2,462.00 - $ 2,462.00
$ 2,462.00

Foster BLH4S/S, 1/2" ISO-B Hydraulic Coupler x 1/2" Female NPT, ISO-B Series, Ball Lock, 303 Stainless Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster BLH4S/S is a 303 stainless 1/2" coupler i...

View full details
$ 3,076.00
$ 3,076.00 - $ 3,076.00
$ 3,076.00
$ 2,462.00
$ 2,462.00 - $ 2,462.00
$ 2,462.00
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 %
$ 1,289.00
$ 1,289.00 - $ 1,289.00
$ 1,289.00
$ 1,033.00
$ 1,033.00 - $ 1,033.00
$ 1,033.00

Foster BLH4S10, 1/2" ISO-B Hydraulic Coupler x 7/8"-14 SAE, ISO-B Series, Ball Lock, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster BLH4S10 is a steel 1/2" coupler in the FH...

View full details
$ 1,289.00
$ 1,289.00 - $ 1,289.00
$ 1,289.00
$ 1,033.00
$ 1,033.00 - $ 1,033.00
$ 1,033.00
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 %
$ 2,364.00
$ 2,364.00 - $ 2,364.00
$ 2,364.00
$ 1,891.00
$ 1,891.00 - $ 1,891.00
$ 1,891.00

Foster BLH6B, 3/4" ISO-B Hydraulic Coupler x 3/4" Female NPT, ISO-B Series, Ball Lock, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster BLH6B is a brass 3/4" coupler in the FHK ...

View full details
$ 2,364.00
$ 2,364.00 - $ 2,364.00
$ 2,364.00
$ 1,891.00
$ 1,891.00 - $ 1,891.00
$ 1,891.00
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 %
$ 1,818.00
$ 1,818.00 - $ 1,818.00
$ 1,818.00
$ 1,455.00
$ 1,455.00 - $ 1,455.00
$ 1,455.00

Foster BLH6S, 3/4" ISO-B Hydraulic Coupler x 3/4" Female NPT, ISO-B Series, Ball Lock, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster BLH6S is a steel 3/4" coupler in the FHK ...

View full details
$ 1,818.00
$ 1,818.00 - $ 1,818.00
$ 1,818.00
$ 1,455.00
$ 1,455.00 - $ 1,455.00
$ 1,455.00
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 %
$ 4,967.00
$ 4,967.00 - $ 4,967.00
$ 4,967.00
$ 3,972.00
$ 3,972.00 - $ 3,972.00
$ 3,972.00

Foster BLH6S/S, 3/4" ISO-B Hydraulic Coupler x 3/4" Female NPT, ISO-B Series, Ball Lock, 303 Stainless Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster BLH6S/S is a 303 stainless 3/4" coupler i...

View full details
$ 4,967.00
$ 4,967.00 - $ 4,967.00
$ 4,967.00
$ 3,972.00
$ 3,972.00 - $ 3,972.00
$ 3,972.00
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 %
$ 1,840.00
$ 1,840.00 - $ 1,840.00
$ 1,840.00
$ 1,473.00
$ 1,473.00 - $ 1,473.00
$ 1,473.00

Foster BLH6S12, 3/4" ISO-B Hydraulic Coupler x 1-1/16"-12 SAE, ISO-B Series, Ball Lock, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster BLH6S12 is a steel 3/4" coupler in the FH...

View full details
$ 1,840.00
$ 1,840.00 - $ 1,840.00
$ 1,840.00
$ 1,473.00
$ 1,473.00 - $ 1,473.00
$ 1,473.00
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 %
$ 3,431.00
$ 3,431.00 - $ 3,431.00
$ 3,431.00
$ 2,745.00
$ 2,745.00 - $ 2,745.00
$ 2,745.00

Foster BLH8B, 1" ISO-B Hydraulic Coupler x 1" Female NPT, ISO-B Series, Ball Lock, Brass

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster BLH8B is a brass 1" coupler in the FHK Se...

View full details
$ 3,431.00
$ 3,431.00 - $ 3,431.00
$ 3,431.00
$ 2,745.00
$ 2,745.00 - $ 2,745.00
$ 2,745.00
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 %
$ 2,220.00
$ 2,220.00 - $ 2,220.00
$ 2,220.00
$ 1,776.00
$ 1,776.00 - $ 1,776.00
$ 1,776.00

Foster BLH8S, 1" ISO-B Hydraulic Coupler x 1" Female NPT, ISO-B Series, Ball Lock, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster BLH8S is a steel 1" coupler in the FHK Se...

View full details
$ 2,220.00
$ 2,220.00 - $ 2,220.00
$ 2,220.00
$ 1,776.00
$ 1,776.00 - $ 1,776.00
$ 1,776.00
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 %
$ 7,315.00
$ 7,315.00 - $ 7,315.00
$ 7,315.00
$ 5,852.00
$ 5,852.00 - $ 5,852.00
$ 5,852.00

Foster BLH8S/S, 1" ISO-B Hydraulic Coupler x 1" Female NPT, ISO-B Series, Ball Lock, 303 Stainless Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster BLH8S/S is a 303 stainless 1" coupler in ...

View full details
$ 7,315.00
$ 7,315.00 - $ 7,315.00
$ 7,315.00
$ 5,852.00
$ 5,852.00 - $ 5,852.00
$ 5,852.00
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 %
$ 2,494.00
$ 2,494.00 - $ 2,494.00
$ 2,494.00
$ 1,996.00
$ 1,996.00 - $ 1,996.00
$ 1,996.00

Foster BLH8S16, 1" ISO-B Hydraulic Coupler x 15/16"-12 SAE, ISO-B Series, Ball Lock, Plated Steel

The most widely used industrial hydraulic quick coupling, compatible with ISO 7241-1 Series B. The Foster BLH8S16 is a steel 1" coupler in the FHK ...

View full details
$ 2,494.00
$ 2,494.00 - $ 2,494.00
$ 2,494.00
$ 1,996.00
$ 1,996.00 - $ 1,996.00
$ 1,996.00
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 %
$ 384.00
$ 384.00 - $ 384.00
$ 384.00
$ 308.00
$ 308.00 - $ 308.00
$ 308.00

Foster H1B, 1/8" ISO-B Hydraulic Coupler 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 H1B is a brass 1/8" coupler in the FHK Se...

View full details
$ 384.00
$ 384.00 - $ 384.00
$ 384.00
$ 308.00
$ 308.00 - $ 308.00
$ 308.00
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 %
$ 511.00
$ 511.00 - $ 511.00
$ 511.00
$ 409.00
$ 409.00 - $ 409.00
$ 409.00

Foster H1B-101, 1/8" ISO-B Hydraulic Coupler 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 H1B-101 is a brass 1/8" coupler in the FH...

View full details
$ 511.00
$ 511.00 - $ 511.00
$ 511.00
$ 409.00
$ 409.00 - $ 409.00
$ 409.00
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 %
$ 508.00
$ 508.00 - $ 508.00
$ 508.00
$ 406.00
$ 406.00 - $ 406.00
$ 406.00

Foster H1B-103, 1/8" ISO-B Hydraulic Coupler 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 H1B-103 is a brass 1/8" coupler in the FH...

View full details
$ 508.00
$ 508.00 - $ 508.00
$ 508.00
$ 406.00
$ 406.00 - $ 406.00
$ 406.00
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 %
$ 408.00
$ 408.00 - $ 408.00
$ 408.00
$ 326.00
$ 326.00 - $ 326.00
$ 326.00

Foster H1BLV, 1/8" ISO-B Hydraulic Coupler 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 H1BLV is a brass 1/8" coupler in the FHK ...

View full details
$ 408.00
$ 408.00 - $ 408.00
$ 408.00
$ 326.00
$ 326.00 - $ 326.00
$ 326.00
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 %
$ 413.00
$ 413.00 - $ 413.00
$ 413.00
$ 331.00
$ 331.00 - $ 331.00
$ 331.00

Foster H1S, 1/8" ISO-B Hydraulic Coupler 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 H1S is a steel 1/8" coupler in the FHK Se...

View full details
$ 413.00
$ 413.00 - $ 413.00
$ 413.00
$ 331.00
$ 331.00 - $ 331.00
$ 331.00
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 %
$ 506.00
$ 506.00 - $ 506.00
$ 506.00
$ 404.00
$ 404.00 - $ 404.00
$ 404.00

Foster H1S-101, 1/8" ISO-B Hydraulic Coupler 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 H1S-101 is a steel 1/8" coupler in the FH...

View full details
$ 506.00
$ 506.00 - $ 506.00
$ 506.00
$ 404.00
$ 404.00 - $ 404.00
$ 404.00
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 %
$ 1,216.00
$ 1,216.00 - $ 1,216.00
$ 1,216.00
$ 973.00
$ 973.00 - $ 973.00
$ 973.00

Foster H1S/S, 1/8" ISO-B Hydraulic Coupler x 1/8" 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 H1S/S is a 303 stainless 1/8" coupler in ...

View full details
$ 1,216.00
$ 1,216.00 - $ 1,216.00
$ 1,216.00
$ 973.00
$ 973.00 - $ 973.00
$ 973.00
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 %
$ 1,318.00
$ 1,318.00 - $ 1,318.00
$ 1,318.00
$ 1,055.00
$ 1,055.00 - $ 1,055.00
$ 1,055.00

Foster H1S/S-101, 1/8" ISO-B Hydraulic Coupler x 1/8" 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 H1S/S-101 is a 303 stainless 1/8" coupler...

View full details
$ 1,318.00
$ 1,318.00 - $ 1,318.00
$ 1,318.00
$ 1,055.00
$ 1,055.00 - $ 1,055.00
$ 1,055.00
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 %
$ 1,326.00
$ 1,326.00 - $ 1,326.00
$ 1,326.00
$ 1,060.00
$ 1,060.00 - $ 1,060.00
$ 1,060.00

Foster H1S/S-104, 1/8" ISO-B Hydraulic Coupler x 1/8" 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 H1S/S-104 is a 303 stainless 1/8" coupler...

View full details
$ 1,326.00
$ 1,326.00 - $ 1,326.00
$ 1,326.00
$ 1,060.00
$ 1,060.00 - $ 1,060.00
$ 1,060.00
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 %
$ 513.00
$ 513.00 - $ 513.00
$ 513.00
$ 411.00
$ 411.00 - $ 411.00
$ 411.00

Foster H1S4, 1/8" ISO-B Hydraulic Coupler 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 H1S4 is a steel 1/8" coupler in the FHK S...

View full details
$ 513.00
$ 513.00 - $ 513.00
$ 513.00
$ 411.00
$ 411.00 - $ 411.00
$ 411.00
Save 20% Save %

Request a Quote

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