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Foster FST Series Couplers (Straight-Thru)

Foster FST Series full-flow straight-through hydraulic couplers and plugs — no valve in either half, so the inside diameter matches the nominal pipe for maximum flow. Standard Industrial Interchange with manual sleeve connection, body sizes 1/8" to 1-1/2". Brass, steel, and 303 stainless; ball-lock option available. Note: lines do not self-seal on disconnect.

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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 %
$ 462.00
$ 462.00 - $ 462.00
$ 462.00
$ 368.00
$ 368.00 - $ 368.00
$ 368.00

Foster 100FP, 1" Straight-Thru Plug x 1" Female NPT, FST Series, Steel

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 100FP is a steel 1" straight-thru plug in...

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$ 462.00
$ 462.00 - $ 462.00
$ 462.00
$ 368.00
$ 368.00 - $ 368.00
$ 368.00
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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 %
$ 493.00
$ 493.00 - $ 493.00
$ 493.00
$ 394.00
$ 394.00 - $ 394.00
$ 394.00

Foster 100FPB, 1" Straight-Thru Plug x 1" Female NPT, FST Series, Brass

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 100FPB is a brass 1" straight-thru plug i...

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$ 493.00
$ 493.00 - $ 493.00
$ 493.00
$ 394.00
$ 394.00 - $ 394.00
$ 394.00
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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 %
$ 1,452.00
$ 1,452.00 - $ 1,452.00
$ 1,452.00
$ 1,162.00
$ 1,162.00 - $ 1,162.00
$ 1,162.00

Foster 100FPS, 1" Straight-Thru Plug x 1" Female NPT, FST Series, 303 Stainless Steel

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 100FPS is a 303 stainless 1" straight-thr...

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$ 1,452.00
$ 1,452.00 - $ 1,452.00
$ 1,452.00
$ 1,162.00
$ 1,162.00 - $ 1,162.00
$ 1,162.00
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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 %
$ 807.00
$ 807.00 - $ 807.00
$ 807.00
$ 647.00
$ 647.00 - $ 647.00
$ 647.00

Foster 100FS, 1" Straight-Thru Coupler x 1" Female NPT, FST Series, Brass

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 100FS is a brass 1" straight-thru coupler...

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$ 807.00
$ 807.00 - $ 807.00
$ 807.00
$ 647.00
$ 647.00 - $ 647.00
$ 647.00
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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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$ 973.00
$ 973.00 - $ 973.00
$ 973.00
$ 778.00
$ 778.00 - $ 778.00
$ 778.00

Foster 100FS-101, 1" Straight-Thru Coupler x 1" Female NPT, FST Series, Viton Seal, Brass

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 100FS-101 is a brass 1" straight-thru cou...

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$ 973.00
$ 973.00 - $ 973.00
$ 973.00
$ 778.00
$ 778.00 - $ 778.00
$ 778.00
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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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$ 3,032.00
$ 3,032.00 - $ 3,032.00
$ 3,032.00
$ 2,427.00
$ 2,427.00 - $ 2,427.00
$ 2,427.00

Foster 100FSS, 1" Straight-Thru Coupler x 1" Female NPT, FST Series, 303 Stainless Steel

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 100FSS is a 303 stainless 1" straight-thr...

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$ 3,032.00
$ 3,032.00 - $ 3,032.00
$ 3,032.00
$ 2,427.00
$ 2,427.00 - $ 2,427.00
$ 2,427.00
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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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$ 1,321.00
$ 1,321.00 - $ 1,321.00
$ 1,321.00
$ 1,056.00
$ 1,056.00 - $ 1,056.00
$ 1,056.00

Foster 125FP, 1-1/4" Straight-Thru Plug x 1-1/4" Female NPT, FST Series, Steel

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 125FP is a steel 1-1/4" straight-thru plu...

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$ 1,321.00
$ 1,321.00 - $ 1,321.00
$ 1,321.00
$ 1,056.00
$ 1,056.00 - $ 1,056.00
$ 1,056.00
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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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$ 1,474.00
$ 1,474.00 - $ 1,474.00
$ 1,474.00
$ 1,181.00
$ 1,181.00 - $ 1,181.00
$ 1,181.00

Foster 125FPB, 1-1/4" Straight-Thru Plug x 1-1/4" Female NPT, FST Series, Brass

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 125FPB is a brass 1-1/4" straight-thru pl...

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$ 1,474.00
$ 1,474.00 - $ 1,474.00
$ 1,474.00
$ 1,181.00
$ 1,181.00 - $ 1,181.00
$ 1,181.00
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 %
$ 2,468.00
$ 2,468.00 - $ 2,468.00
$ 2,468.00
$ 1,976.00
$ 1,976.00 - $ 1,976.00
$ 1,976.00

Foster 125FS, 1-1/4" Straight-Thru Coupler x 1-1/4" Female NPT, FST Series, Brass

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 125FS is a brass 1-1/4" straight-thru cou...

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$ 2,468.00
$ 2,468.00 - $ 2,468.00
$ 2,468.00
$ 1,976.00
$ 1,976.00 - $ 1,976.00
$ 1,976.00
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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 %
$ 2,594.00
$ 2,594.00 - $ 2,594.00
$ 2,594.00
$ 2,076.00
$ 2,076.00 - $ 2,076.00
$ 2,076.00

Foster 125FS-103, 1-1/4" Straight-Thru Coupler x 1-1/4" Female NPT, FST Series, EPDM Seal, Brass

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 125FS-103 is a brass 1-1/4" straight-thru...

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$ 2,594.00
$ 2,594.00 - $ 2,594.00
$ 2,594.00
$ 2,076.00
$ 2,076.00 - $ 2,076.00
$ 2,076.00
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 21% Save %
$ 80.00
$ 80.00 - $ 80.00
$ 80.00
$ 63.00
$ 63.00 - $ 63.00
$ 63.00

Foster 12FPB, 1/8" Straight-Thru Plug x 1/8" Female NPT, FST Series, Brass

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 12FPB is a brass 1/8" straight-thru plug ...

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$ 80.00
$ 80.00 - $ 80.00
$ 80.00
$ 63.00
$ 63.00 - $ 63.00
$ 63.00
Save 21% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 311.00
$ 311.00 - $ 311.00
$ 311.00
$ 249.00
$ 249.00 - $ 249.00
$ 249.00

Foster 12FPS, 1/8" Straight-Thru Plug x 1/8" Female NPT, FST Series, 303 Stainless Steel

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 12FPS is a 303 stainless 1/8" straight-th...

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$ 311.00
$ 311.00 - $ 311.00
$ 311.00
$ 249.00
$ 249.00 - $ 249.00
$ 249.00
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 %
$ 192.00
$ 192.00 - $ 192.00
$ 192.00
$ 154.00
$ 154.00 - $ 154.00
$ 154.00

Foster 12FS, 1/8" Straight-Thru Coupler x 1/8" Female NPT, FST Series, Brass

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 12FS is a brass 1/8" straight-thru couple...

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$ 192.00
$ 192.00 - $ 192.00
$ 192.00
$ 154.00
$ 154.00 - $ 154.00
$ 154.00
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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 %
$ 237.00
$ 237.00 - $ 237.00
$ 237.00
$ 190.00
$ 190.00 - $ 190.00
$ 190.00

Foster 12FS-101, 1/8" Straight-Thru Coupler x 1/8" Female NPT, FST Series, Viton Seal, Brass

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 12FS-101 is a brass 1/8" straight-thru co...

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$ 237.00
$ 237.00 - $ 237.00
$ 237.00
$ 190.00
$ 190.00 - $ 190.00
$ 190.00
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 %
$ 669.00
$ 669.00 - $ 669.00
$ 669.00
$ 534.00
$ 534.00 - $ 534.00
$ 534.00

Foster 12FSS, 1/8" Straight-Thru Coupler x 1/8" Female NPT, FST Series, 303 Stainless Steel

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 12FSS is a 303 stainless 1/8" straight-th...

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$ 669.00
$ 669.00 - $ 669.00
$ 669.00
$ 534.00
$ 534.00 - $ 534.00
$ 534.00
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 %
$ 714.00
$ 714.00 - $ 714.00
$ 714.00
$ 572.00
$ 572.00 - $ 572.00
$ 572.00

Foster 12FSS-101, 1/8" Straight-Thru Coupler x 1/8" Female NPT, FST Series, Viton Seal, 303 Stainless Steel

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 12FSS-101 is a 303 stainless 1/8" straigh...

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$ 714.00
$ 714.00 - $ 714.00
$ 714.00
$ 572.00
$ 572.00 - $ 572.00
$ 572.00
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 %
$ 709.00
$ 709.00 - $ 709.00
$ 709.00
$ 567.00
$ 567.00 - $ 567.00
$ 567.00

Foster 12FSS-103, 1/8" Straight-Thru Coupler x 1/8" Female NPT, FST Series, EPDM Seal, 303 Stainless Steel

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 12FSS-103 is a 303 stainless 1/8" straigh...

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$ 709.00
$ 709.00 - $ 709.00
$ 709.00
$ 567.00
$ 567.00 - $ 567.00
$ 567.00
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 %
$ 1,353.00
$ 1,353.00 - $ 1,353.00
$ 1,353.00
$ 1,082.00
$ 1,082.00 - $ 1,082.00
$ 1,082.00

Foster 150FP, 1-1/2" Straight-Thru Plug x 1-1/2" Female NPT, FST Series, Steel

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 150FP is a steel 1-1/2" straight-thru plu...

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$ 1,353.00
$ 1,353.00 - $ 1,353.00
$ 1,353.00
$ 1,082.00
$ 1,082.00 - $ 1,082.00
$ 1,082.00
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 %
$ 1,751.00
$ 1,751.00 - $ 1,751.00
$ 1,751.00
$ 1,400.00
$ 1,400.00 - $ 1,400.00
$ 1,400.00

Foster 150FPB, 1-1/2" Straight-Thru Plug x 1-1/2" Female NPT, FST Series, Brass

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 150FPB is a brass 1-1/2" straight-thru pl...

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$ 1,751.00
$ 1,751.00 - $ 1,751.00
$ 1,751.00
$ 1,400.00
$ 1,400.00 - $ 1,400.00
$ 1,400.00
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 %
$ 4,836.00
$ 4,836.00 - $ 4,836.00
$ 4,836.00
$ 3,870.00
$ 3,870.00 - $ 3,870.00
$ 3,870.00

Foster 150FS, 1-1/2" Straight-Thru Coupler x 1-1/2" Female NPT, FST Series, Brass

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 150FS is a brass 1-1/2" straight-thru cou...

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$ 4,836.00
$ 4,836.00 - $ 4,836.00
$ 4,836.00
$ 3,870.00
$ 3,870.00 - $ 3,870.00
$ 3,870.00
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 %
$ 82.00
$ 82.00 - $ 82.00
$ 82.00
$ 66.00
$ 66.00 - $ 66.00
$ 66.00

Foster 25FP, 1/4" Straight-Thru Plug x 1/4" Female NPT, FST Series, Steel

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 25FP is a steel 1/4" straight-thru plug i...

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$ 82.00
$ 82.00 - $ 82.00
$ 82.00
$ 66.00
$ 66.00 - $ 66.00
$ 66.00
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 %
$ 106.00
$ 106.00 - $ 106.00
$ 106.00
$ 85.00
$ 85.00 - $ 85.00
$ 85.00

Foster 25FPB, 1/4" Straight-Thru Plug x 1/4" Female NPT, FST Series, Brass

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 25FPB is a brass 1/4" straight-thru plug ...

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$ 106.00
$ 106.00 - $ 106.00
$ 106.00
$ 85.00
$ 85.00 - $ 85.00
$ 85.00
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 %
$ 360.00
$ 360.00 - $ 360.00
$ 360.00
$ 289.00
$ 289.00 - $ 289.00
$ 289.00

Foster 25FPS, 1/4" Straight-Thru Plug x 1/4" Female NPT, FST Series, 303 Stainless Steel

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 25FPS is a 303 stainless 1/4" straight-th...

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$ 360.00
$ 360.00 - $ 360.00
$ 360.00
$ 289.00
$ 289.00 - $ 289.00
$ 289.00
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 21% Save %
$ 227.00
$ 227.00 - $ 227.00
$ 227.00
$ 180.00
$ 180.00 - $ 180.00
$ 180.00

Foster 25FS, 1/4" Straight-Thru Coupler x 1/4" Female NPT, FST Series, Brass

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 25FS is a brass 1/4" straight-thru couple...

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$ 227.00
$ 227.00 - $ 227.00
$ 227.00
$ 180.00
$ 180.00 - $ 180.00
$ 180.00
Save 21% Save %

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