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

Foster 6 Series Couplers

The Foster 6 Series is the 3/4" body industrial interchange, a high-flow air coupler size for heavy shop and industrial systems. This collection includes 6 Series automatic couplers and plugs in brass and steel with NPT and hose barb 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 %
$ 1,366.00
$ 1,366.00 - $ 1,366.00
$ 1,366.00
$ 1,094.00
$ 1,094.00 - $ 1,094.00
$ 1,094.00

Foster FM7006, 3/4" Industrial Coupler x 1" Hose ID, 6 Series, Automatic, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM7006 is a Brass 3/4" industrial coupler from the Foster 6 Seri...

View full details
$ 1,366.00
$ 1,366.00 - $ 1,366.00
$ 1,366.00
$ 1,094.00
$ 1,094.00 - $ 1,094.00
$ 1,094.00
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 %
$ 1,428.00
$ 1,428.00 - $ 1,428.00
$ 1,428.00
$ 1,142.00
$ 1,142.00 - $ 1,142.00
$ 1,142.00

Foster FM6906W, 3/4" Industrial Coupler x 3/4" Hose ID, 6 Series, Automatic, Water, Brass/SS

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM6906W is a Brass/SS 3/4" industrial coupler from the Foster 6 ...

View full details
$ 1,428.00
$ 1,428.00 - $ 1,428.00
$ 1,428.00
$ 1,142.00
$ 1,142.00 - $ 1,142.00
$ 1,142.00
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 %
$ 1,506.00
$ 1,506.00 - $ 1,506.00
$ 1,506.00
$ 1,205.00
$ 1,205.00 - $ 1,205.00
$ 1,205.00

Foster SL6906, 3/4" Industrial Coupler x 3/4" Hose ID, 6 Series, Automatic Sleeve Lock, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster SL6906 is a Brass 3/4" industrial coupler from the Foster 6 Seri...

View full details
$ 1,506.00
$ 1,506.00 - $ 1,506.00
$ 1,506.00
$ 1,205.00
$ 1,205.00 - $ 1,205.00
$ 1,205.00
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 %
$ 1,315.00
$ 1,315.00 - $ 1,315.00
$ 1,315.00
$ 1,053.00
$ 1,053.00 - $ 1,053.00
$ 1,053.00

Foster FM6906, 3/4" Industrial Coupler x 3/4" Hose ID, 6 Series, Automatic, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM6906 is a Brass 3/4" industrial coupler from the Foster 6 Seri...

View full details
$ 1,315.00
$ 1,315.00 - $ 1,315.00
$ 1,315.00
$ 1,053.00
$ 1,053.00 - $ 1,053.00
$ 1,053.00
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 %
$ 1,349.00
$ 1,349.00 - $ 1,349.00
$ 1,349.00
$ 1,080.00
$ 1,080.00 - $ 1,080.00
$ 1,080.00

Foster FM6806W, 3/4" Industrial Coupler x 1/2" Hose ID, 6 Series, Automatic, Water, Brass/SS

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM6806W is a Brass/SS 3/4" industrial coupler from the Foster 6 ...

View full details
$ 1,349.00
$ 1,349.00 - $ 1,349.00
$ 1,349.00
$ 1,080.00
$ 1,080.00 - $ 1,080.00
$ 1,080.00
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 %
$ 1,248.00
$ 1,248.00 - $ 1,248.00
$ 1,248.00
$ 998.00
$ 998.00 - $ 998.00
$ 998.00

Foster FM6806, 3/4" Industrial Coupler x 1/2" Hose ID, 6 Series, Automatic, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM6806 is a Brass 3/4" industrial coupler from the Foster 6 Seri...

View full details
$ 1,248.00
$ 1,248.00 - $ 1,248.00
$ 1,248.00
$ 998.00
$ 998.00 - $ 998.00
$ 998.00
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 %
$ 1,421.00
$ 1,421.00 - $ 1,421.00
$ 1,421.00
$ 1,136.00
$ 1,136.00 - $ 1,136.00
$ 1,136.00

Foster SL6706, 3/4" Industrial Coupler x 1" Male NPT, 6 Series, Automatic Sleeve Lock, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster SL6706 is a Brass 3/4" industrial coupler from the Foster 6 Seri...

View full details
$ 1,421.00
$ 1,421.00 - $ 1,421.00
$ 1,421.00
$ 1,136.00
$ 1,136.00 - $ 1,136.00
$ 1,136.00
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 %
$ 1,237.00
$ 1,237.00 - $ 1,237.00
$ 1,237.00
$ 989.00
$ 989.00 - $ 989.00
$ 989.00

Foster FM6706, 3/4" Industrial Coupler x 1" Male NPT, 6 Series, Automatic, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM6706 is a Brass 3/4" industrial coupler from the Foster 6 Seri...

View full details
$ 1,237.00
$ 1,237.00 - $ 1,237.00
$ 1,237.00
$ 989.00
$ 989.00 - $ 989.00
$ 989.00
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 %
$ 1,320.00
$ 1,320.00 - $ 1,320.00
$ 1,320.00
$ 1,055.00
$ 1,055.00 - $ 1,055.00
$ 1,055.00

Foster FM6506W, 3/4" Industrial Coupler x 3/4" Male NPT, 6 Series, Automatic, Water, Brass/SS

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM6506W is a Brass/SS 3/4" industrial coupler from the Foster 6 ...

View full details
$ 1,320.00
$ 1,320.00 - $ 1,320.00
$ 1,320.00
$ 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 %
$ 1,405.00
$ 1,405.00 - $ 1,405.00
$ 1,405.00
$ 1,126.00
$ 1,126.00 - $ 1,126.00
$ 1,126.00

Foster FM6506S, 3/4" Industrial Coupler x 3/4" Male NPT, 6 Series, Automatic, Steam/EPDM, Brass/SS

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM6506S is a Brass/SS 3/4" industrial coupler from the Foster 6 ...

View full details
$ 1,405.00
$ 1,405.00 - $ 1,405.00
$ 1,405.00
$ 1,126.00
$ 1,126.00 - $ 1,126.00
$ 1,126.00
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 %
$ 1,398.00
$ 1,398.00 - $ 1,398.00
$ 1,398.00
$ 1,119.00
$ 1,119.00 - $ 1,119.00
$ 1,119.00

Foster SL6506, 3/4" Industrial Coupler x 3/4" Male NPT, 6 Series, Automatic Sleeve Lock, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster SL6506 is a Brass 3/4" industrial coupler from the Foster 6 Seri...

View full details
$ 1,398.00
$ 1,398.00 - $ 1,398.00
$ 1,398.00
$ 1,119.00
$ 1,119.00 - $ 1,119.00
$ 1,119.00
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 %
$ 1,207.00
$ 1,207.00 - $ 1,207.00
$ 1,207.00
$ 966.00
$ 966.00 - $ 966.00
$ 966.00

Foster FM6506, 3/4" Industrial Coupler x 3/4" Male NPT, 6 Series, Automatic, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM6506 is a Brass 3/4" industrial coupler from the Foster 6 Seri...

View full details
$ 1,207.00
$ 1,207.00 - $ 1,207.00
$ 1,207.00
$ 966.00
$ 966.00 - $ 966.00
$ 966.00
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 %
$ 1,304.00
$ 1,304.00 - $ 1,304.00
$ 1,304.00
$ 1,044.00
$ 1,044.00 - $ 1,044.00
$ 1,044.00

Foster FM6306W, 3/4" Industrial Coupler x 1/2" Male NPT, 6 Series, Automatic, Water, Brass/SS

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM6306W is a Brass/SS 3/4" industrial coupler from the Foster 6 ...

View full details
$ 1,304.00
$ 1,304.00 - $ 1,304.00
$ 1,304.00
$ 1,044.00
$ 1,044.00 - $ 1,044.00
$ 1,044.00
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 %
$ 1,442.00
$ 1,442.00 - $ 1,442.00
$ 1,442.00
$ 1,154.00
$ 1,154.00 - $ 1,154.00
$ 1,154.00

Foster FM6306S, 3/4" Industrial Coupler x 1/2" Male NPT, 6 Series, Automatic, Steam/EPDM, Brass/SS

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM6306S is a Brass/SS 3/4" industrial coupler from the Foster 6 ...

View full details
$ 1,442.00
$ 1,442.00 - $ 1,442.00
$ 1,442.00
$ 1,154.00
$ 1,154.00 - $ 1,154.00
$ 1,154.00
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 %
$ 1,439.00
$ 1,439.00 - $ 1,439.00
$ 1,439.00
$ 1,150.00
$ 1,150.00 - $ 1,150.00
$ 1,150.00

Foster SL6306, 3/4" Industrial Coupler x 1/2" Male NPT, 6 Series, Automatic Sleeve Lock, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster SL6306 is a Brass 3/4" industrial coupler from the Foster 6 Seri...

View full details
$ 1,439.00
$ 1,439.00 - $ 1,439.00
$ 1,439.00
$ 1,150.00
$ 1,150.00 - $ 1,150.00
$ 1,150.00
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 %
$ 1,251.00
$ 1,251.00 - $ 1,251.00
$ 1,251.00
$ 1,002.00
$ 1,002.00 - $ 1,002.00
$ 1,002.00

Foster FM6306, 3/4" Industrial Coupler x 1/2" Male NPT, 6 Series, Automatic, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM6306 is a Brass 3/4" industrial coupler from the Foster 6 Seri...

View full details
$ 1,251.00
$ 1,251.00 - $ 1,251.00
$ 1,251.00
$ 1,002.00
$ 1,002.00 - $ 1,002.00
$ 1,002.00
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 %
$ 1,327.00
$ 1,327.00 - $ 1,327.00
$ 1,327.00
$ 1,062.00
$ 1,062.00 - $ 1,062.00
$ 1,062.00

Foster FM6606W, 3/4" Industrial Coupler x 1" Female NPT, 6 Series, Automatic, Water, Brass/SS

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM6606W is a Brass/SS 3/4" industrial coupler from the Foster 6 ...

View full details
$ 1,327.00
$ 1,327.00 - $ 1,327.00
$ 1,327.00
$ 1,062.00
$ 1,062.00 - $ 1,062.00
$ 1,062.00
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 %
$ 1,412.00
$ 1,412.00 - $ 1,412.00
$ 1,412.00
$ 1,131.00
$ 1,131.00 - $ 1,131.00
$ 1,131.00

Foster SL6606, 3/4" Industrial Coupler x 1" Female NPT, 6 Series, Automatic Sleeve Lock, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster SL6606 is a Brass 3/4" industrial coupler from the Foster 6 Seri...

View full details
$ 1,412.00
$ 1,412.00 - $ 1,412.00
$ 1,412.00
$ 1,131.00
$ 1,131.00 - $ 1,131.00
$ 1,131.00
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 %
$ 1,205.00
$ 1,205.00 - $ 1,205.00
$ 1,205.00
$ 965.00
$ 965.00 - $ 965.00
$ 965.00

Foster FM6606, 3/4" Industrial Coupler x 1" Female NPT, 6 Series, Automatic, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM6606 is a Brass 3/4" industrial coupler from the Foster 6 Seri...

View full details
$ 1,205.00
$ 1,205.00 - $ 1,205.00
$ 1,205.00
$ 965.00
$ 965.00 - $ 965.00
$ 965.00
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 %
$ 1,311.00
$ 1,311.00 - $ 1,311.00
$ 1,311.00
$ 1,050.00
$ 1,050.00 - $ 1,050.00
$ 1,050.00

Foster FM6406W, 3/4" Industrial Coupler x 3/4" Female NPT, 6 Series, Automatic, Water, Brass/SS

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM6406W is a Brass/SS 3/4" industrial coupler from the Foster 6 ...

View full details
$ 1,311.00
$ 1,311.00 - $ 1,311.00
$ 1,311.00
$ 1,050.00
$ 1,050.00 - $ 1,050.00
$ 1,050.00
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 %
$ 1,395.00
$ 1,395.00 - $ 1,395.00
$ 1,395.00
$ 1,115.00
$ 1,115.00 - $ 1,115.00
$ 1,115.00

Foster FM6406S, 3/4" Industrial Coupler x 3/4" Female NPT, 6 Series, Automatic, Steam/EPDM, Brass/SS

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM6406S is a Brass/SS 3/4" industrial coupler from the Foster 6 ...

View full details
$ 1,395.00
$ 1,395.00 - $ 1,395.00
$ 1,395.00
$ 1,115.00
$ 1,115.00 - $ 1,115.00
$ 1,115.00
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 %
$ 1,529.00
$ 1,529.00 - $ 1,529.00
$ 1,529.00
$ 1,223.00
$ 1,223.00 - $ 1,223.00
$ 1,223.00

Foster SL6406H, 3/4" Industrial Coupler x 3/4" Female NPT, 6 Series, Automatic Sleeve Lock, Heat/Viton, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster SL6406H is a Brass 3/4" industrial coupler from the Foster 6 Ser...

View full details
$ 1,529.00
$ 1,529.00 - $ 1,529.00
$ 1,529.00
$ 1,223.00
$ 1,223.00 - $ 1,223.00
$ 1,223.00
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 %
$ 1,255.00
$ 1,255.00 - $ 1,255.00
$ 1,255.00
$ 1,004.00
$ 1,004.00 - $ 1,004.00
$ 1,004.00

Foster FM6406H, 3/4" Industrial Coupler x 3/4" Female NPT, 6 Series, Automatic, Heat/Viton, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster FM6406H is a Brass 3/4" industrial coupler from the Foster 6 Ser...

View full details
$ 1,255.00
$ 1,255.00 - $ 1,255.00
$ 1,255.00
$ 1,004.00
$ 1,004.00 - $ 1,004.00
$ 1,004.00
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 %
$ 1,391.00
$ 1,391.00 - $ 1,391.00
$ 1,391.00
$ 1,113.00
$ 1,113.00 - $ 1,113.00
$ 1,113.00

Foster SL6406, 3/4" Industrial Coupler x 3/4" Female NPT, 6 Series, Automatic Sleeve Lock, Brass

Reliable, leak-free 1/2" connections for high-flow air and fluid lines. The Foster SL6406 is a Brass 3/4" industrial coupler from the Foster 6 Seri...

View full details
$ 1,391.00
$ 1,391.00 - $ 1,391.00
$ 1,391.00
$ 1,113.00
$ 1,113.00 - $ 1,113.00
$ 1,113.00
Save 20% Save %

Request a Quote

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