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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 %
$ 490.00
$ 490.00 - $ 490.00
$ 490.00
$ 391.00
$ 391.00 - $ 391.00
$ 391.00

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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$ 490.00
$ 490.00 - $ 490.00
$ 490.00
$ 391.00
$ 391.00 - $ 391.00
$ 391.00
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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 %
$ 523.00
$ 523.00 - $ 523.00
$ 523.00
$ 419.00
$ 419.00 - $ 419.00
$ 419.00

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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$ 523.00
$ 523.00 - $ 523.00
$ 523.00
$ 419.00
$ 419.00 - $ 419.00
$ 419.00
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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 %
$ 1,542.00
$ 1,542.00 - $ 1,542.00
$ 1,542.00
$ 1,233.00
$ 1,233.00 - $ 1,233.00
$ 1,233.00

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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$ 1,542.00
$ 1,542.00 - $ 1,542.00
$ 1,542.00
$ 1,233.00
$ 1,233.00 - $ 1,233.00
$ 1,233.00
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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 %
$ 857.00
$ 857.00 - $ 857.00
$ 857.00
$ 687.00
$ 687.00 - $ 687.00
$ 687.00

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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$ 857.00
$ 857.00 - $ 857.00
$ 857.00
$ 687.00
$ 687.00 - $ 687.00
$ 687.00
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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 %
$ 1,033.00
$ 1,033.00 - $ 1,033.00
$ 1,033.00
$ 826.00
$ 826.00 - $ 826.00
$ 826.00

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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$ 1,033.00
$ 1,033.00 - $ 1,033.00
$ 1,033.00
$ 826.00
$ 826.00 - $ 826.00
$ 826.00
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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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$ 3,219.00
$ 3,219.00 - $ 3,219.00
$ 3,219.00
$ 2,577.00
$ 2,577.00 - $ 2,577.00
$ 2,577.00

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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$ 3,219.00
$ 3,219.00 - $ 3,219.00
$ 3,219.00
$ 2,577.00
$ 2,577.00 - $ 2,577.00
$ 2,577.00
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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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$ 1,402.00
$ 1,402.00 - $ 1,402.00
$ 1,402.00
$ 1,121.00
$ 1,121.00 - $ 1,121.00
$ 1,121.00

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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$ 1,402.00
$ 1,402.00 - $ 1,402.00
$ 1,402.00
$ 1,121.00
$ 1,121.00 - $ 1,121.00
$ 1,121.00
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 %
$ 1,566.00
$ 1,566.00 - $ 1,566.00
$ 1,566.00
$ 1,254.00
$ 1,254.00 - $ 1,254.00
$ 1,254.00

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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$ 1,566.00
$ 1,566.00 - $ 1,566.00
$ 1,566.00
$ 1,254.00
$ 1,254.00 - $ 1,254.00
$ 1,254.00
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 %
$ 2,621.00
$ 2,621.00 - $ 2,621.00
$ 2,621.00
$ 2,098.00
$ 2,098.00 - $ 2,098.00
$ 2,098.00

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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$ 2,621.00
$ 2,621.00 - $ 2,621.00
$ 2,621.00
$ 2,098.00
$ 2,098.00 - $ 2,098.00
$ 2,098.00
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 %
$ 2,755.00
$ 2,755.00 - $ 2,755.00
$ 2,755.00
$ 2,204.00
$ 2,204.00 - $ 2,204.00
$ 2,204.00

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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$ 2,755.00
$ 2,755.00 - $ 2,755.00
$ 2,755.00
$ 2,204.00
$ 2,204.00 - $ 2,204.00
$ 2,204.00
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 %
$ 331.00
$ 331.00 - $ 331.00
$ 331.00
$ 265.00
$ 265.00 - $ 265.00
$ 265.00

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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$ 331.00
$ 331.00 - $ 331.00
$ 331.00
$ 265.00
$ 265.00 - $ 265.00
$ 265.00
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
$ 164.00
$ 164.00 - $ 164.00
$ 164.00

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
$ 164.00
$ 164.00 - $ 164.00
$ 164.00
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 %
$ 252.00
$ 252.00 - $ 252.00
$ 252.00
$ 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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$ 252.00
$ 252.00 - $ 252.00
$ 252.00
$ 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 %
$ 710.00
$ 710.00 - $ 710.00
$ 710.00
$ 567.00
$ 567.00 - $ 567.00
$ 567.00

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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$ 710.00
$ 710.00 - $ 710.00
$ 710.00
$ 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 %
$ 758.00
$ 758.00 - $ 758.00
$ 758.00
$ 608.00
$ 608.00 - $ 608.00
$ 608.00

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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$ 758.00
$ 758.00 - $ 758.00
$ 758.00
$ 608.00
$ 608.00 - $ 608.00
$ 608.00
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 %
$ 753.00
$ 753.00 - $ 753.00
$ 753.00
$ 602.00
$ 602.00 - $ 602.00
$ 602.00

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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$ 753.00
$ 753.00 - $ 753.00
$ 753.00
$ 602.00
$ 602.00 - $ 602.00
$ 602.00
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 %
$ 1,437.00
$ 1,437.00 - $ 1,437.00
$ 1,437.00
$ 1,149.00
$ 1,149.00 - $ 1,149.00
$ 1,149.00

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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$ 1,437.00
$ 1,437.00 - $ 1,437.00
$ 1,437.00
$ 1,149.00
$ 1,149.00 - $ 1,149.00
$ 1,149.00
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 %
$ 1,859.00
$ 1,859.00 - $ 1,859.00
$ 1,859.00
$ 1,487.00
$ 1,487.00 - $ 1,487.00
$ 1,487.00

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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$ 1,859.00
$ 1,859.00 - $ 1,859.00
$ 1,859.00
$ 1,487.00
$ 1,487.00 - $ 1,487.00
$ 1,487.00
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 %
$ 5,134.00
$ 5,134.00 - $ 5,134.00
$ 5,134.00
$ 4,109.00
$ 4,109.00 - $ 4,109.00
$ 4,109.00

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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$ 5,134.00
$ 5,134.00 - $ 5,134.00
$ 5,134.00
$ 4,109.00
$ 4,109.00 - $ 4,109.00
$ 4,109.00
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 %
$ 87.00
$ 87.00 - $ 87.00
$ 87.00
$ 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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$ 87.00
$ 87.00 - $ 87.00
$ 87.00
$ 70.00
$ 70.00 - $ 70.00
$ 70.00
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 %
$ 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 %
$ 382.00
$ 382.00 - $ 382.00
$ 382.00
$ 307.00
$ 307.00 - $ 307.00
$ 307.00

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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$ 382.00
$ 382.00 - $ 382.00
$ 382.00
$ 307.00
$ 307.00 - $ 307.00
$ 307.00
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 %
$ 241.00
$ 241.00 - $ 241.00
$ 241.00
$ 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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$ 241.00
$ 241.00 - $ 241.00
$ 241.00
$ 191.00
$ 191.00 - $ 191.00
$ 191.00
Save 21% Save %

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