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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 %
$ 489.00
$ 489.00 - $ 489.00
$ 489.00
$ 390.00
$ 390.00 - $ 390.00
$ 390.00

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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$ 489.00
$ 489.00 - $ 489.00
$ 489.00
$ 390.00
$ 390.00 - $ 390.00
$ 390.00
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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 %
$ 522.00
$ 522.00 - $ 522.00
$ 522.00
$ 418.00
$ 418.00 - $ 418.00
$ 418.00

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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$ 522.00
$ 522.00 - $ 522.00
$ 522.00
$ 418.00
$ 418.00 - $ 418.00
$ 418.00
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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 %
$ 1,539.00
$ 1,539.00 - $ 1,539.00
$ 1,539.00
$ 1,231.00
$ 1,231.00 - $ 1,231.00
$ 1,231.00

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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$ 1,539.00
$ 1,539.00 - $ 1,539.00
$ 1,539.00
$ 1,231.00
$ 1,231.00 - $ 1,231.00
$ 1,231.00
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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 %
$ 856.00
$ 856.00 - $ 856.00
$ 856.00
$ 685.00
$ 685.00 - $ 685.00
$ 685.00

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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$ 856.00
$ 856.00 - $ 856.00
$ 856.00
$ 685.00
$ 685.00 - $ 685.00
$ 685.00
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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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$ 1,032.00
$ 1,032.00 - $ 1,032.00
$ 1,032.00
$ 825.00
$ 825.00 - $ 825.00
$ 825.00

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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$ 1,032.00
$ 1,032.00 - $ 1,032.00
$ 1,032.00
$ 825.00
$ 825.00 - $ 825.00
$ 825.00
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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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$ 3,213.00
$ 3,213.00 - $ 3,213.00
$ 3,213.00
$ 2,572.00
$ 2,572.00 - $ 2,572.00
$ 2,572.00

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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$ 3,213.00
$ 3,213.00 - $ 3,213.00
$ 3,213.00
$ 2,572.00
$ 2,572.00 - $ 2,572.00
$ 2,572.00
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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 %
$ 1,400.00
$ 1,400.00 - $ 1,400.00
$ 1,400.00
$ 1,119.00
$ 1,119.00 - $ 1,119.00
$ 1,119.00

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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$ 1,400.00
$ 1,400.00 - $ 1,400.00
$ 1,400.00
$ 1,119.00
$ 1,119.00 - $ 1,119.00
$ 1,119.00
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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 %
$ 1,563.00
$ 1,563.00 - $ 1,563.00
$ 1,563.00
$ 1,251.00
$ 1,251.00 - $ 1,251.00
$ 1,251.00

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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$ 1,563.00
$ 1,563.00 - $ 1,563.00
$ 1,563.00
$ 1,251.00
$ 1,251.00 - $ 1,251.00
$ 1,251.00
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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 %
$ 2,616.00
$ 2,616.00 - $ 2,616.00
$ 2,616.00
$ 2,094.00
$ 2,094.00 - $ 2,094.00
$ 2,094.00

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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$ 2,616.00
$ 2,616.00 - $ 2,616.00
$ 2,616.00
$ 2,094.00
$ 2,094.00 - $ 2,094.00
$ 2,094.00
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 %
$ 2,750.00
$ 2,750.00 - $ 2,750.00
$ 2,750.00
$ 2,200.00
$ 2,200.00 - $ 2,200.00
$ 2,200.00

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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$ 2,750.00
$ 2,750.00 - $ 2,750.00
$ 2,750.00
$ 2,200.00
$ 2,200.00 - $ 2,200.00
$ 2,200.00
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 22% Save %
$ 85.00
$ 85.00 - $ 85.00
$ 85.00
$ 66.00
$ 66.00 - $ 66.00
$ 66.00

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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$ 85.00
$ 85.00 - $ 85.00
$ 85.00
$ 66.00
$ 66.00 - $ 66.00
$ 66.00
Save 22% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 330.00
$ 330.00 - $ 330.00
$ 330.00
$ 264.00
$ 264.00 - $ 264.00
$ 264.00

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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$ 330.00
$ 330.00 - $ 330.00
$ 330.00
$ 264.00
$ 264.00 - $ 264.00
$ 264.00
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 %
$ 204.00
$ 204.00 - $ 204.00
$ 204.00
$ 163.00
$ 163.00 - $ 163.00
$ 163.00

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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$ 204.00
$ 204.00 - $ 204.00
$ 204.00
$ 163.00
$ 163.00 - $ 163.00
$ 163.00
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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 %
$ 251.00
$ 251.00 - $ 251.00
$ 251.00
$ 202.00
$ 202.00 - $ 202.00
$ 202.00

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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$ 251.00
$ 251.00 - $ 251.00
$ 251.00
$ 202.00
$ 202.00 - $ 202.00
$ 202.00
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
$ 566.00
$ 566.00 - $ 566.00
$ 566.00

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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$ 709.00
$ 709.00 - $ 709.00
$ 709.00
$ 566.00
$ 566.00 - $ 566.00
$ 566.00
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 %
$ 757.00
$ 757.00 - $ 757.00
$ 757.00
$ 607.00
$ 607.00 - $ 607.00
$ 607.00

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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$ 757.00
$ 757.00 - $ 757.00
$ 757.00
$ 607.00
$ 607.00 - $ 607.00
$ 607.00
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 %
$ 751.00
$ 751.00 - $ 751.00
$ 751.00
$ 601.00
$ 601.00 - $ 601.00
$ 601.00

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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$ 751.00
$ 751.00 - $ 751.00
$ 751.00
$ 601.00
$ 601.00 - $ 601.00
$ 601.00
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 %
$ 1,435.00
$ 1,435.00 - $ 1,435.00
$ 1,435.00
$ 1,147.00
$ 1,147.00 - $ 1,147.00
$ 1,147.00

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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$ 1,435.00
$ 1,435.00 - $ 1,435.00
$ 1,435.00
$ 1,147.00
$ 1,147.00 - $ 1,147.00
$ 1,147.00
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 %
$ 1,856.00
$ 1,856.00 - $ 1,856.00
$ 1,856.00
$ 1,484.00
$ 1,484.00 - $ 1,484.00
$ 1,484.00

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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$ 1,856.00
$ 1,856.00 - $ 1,856.00
$ 1,856.00
$ 1,484.00
$ 1,484.00 - $ 1,484.00
$ 1,484.00
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 %
$ 5,125.00
$ 5,125.00 - $ 5,125.00
$ 5,125.00
$ 4,101.00
$ 4,101.00 - $ 4,101.00
$ 4,101.00

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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$ 5,125.00
$ 5,125.00 - $ 5,125.00
$ 5,125.00
$ 4,101.00
$ 4,101.00 - $ 4,101.00
$ 4,101.00
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 %
$ 86.00
$ 86.00 - $ 86.00
$ 86.00
$ 70.00
$ 70.00 - $ 70.00
$ 70.00

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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$ 86.00
$ 86.00 - $ 86.00
$ 86.00
$ 70.00
$ 70.00 - $ 70.00
$ 70.00
Save 19% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 20% Save %
$ 112.00
$ 112.00 - $ 112.00
$ 112.00
$ 90.00
$ 90.00 - $ 90.00
$ 90.00

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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$ 112.00
$ 112.00 - $ 112.00
$ 112.00
$ 90.00
$ 90.00 - $ 90.00
$ 90.00
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 %
$ 381.00
$ 381.00 - $ 381.00
$ 381.00
$ 306.00
$ 306.00 - $ 306.00
$ 306.00

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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$ 381.00
$ 381.00 - $ 381.00
$ 381.00
$ 306.00
$ 306.00 - $ 306.00
$ 306.00
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 %
$ 240.00
$ 240.00 - $ 240.00
$ 240.00
$ 191.00
$ 191.00 - $ 191.00
$ 191.00

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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$ 240.00
$ 240.00 - $ 240.00
$ 240.00
$ 191.00
$ 191.00 - $ 191.00
$ 191.00
Save 20% Save %

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