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Foster

Foster quick couplers set the standard in pneumatic and hydraulic connections. Part of the ZSI-Foster line, Foster couplers and plugs cover the full range of industrial interchanges and body sizes in steel, brass, and stainless construction. Built for reliable, repeatable connections in air and fluid systems. Shop the full Foster range below.

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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 %
$ 2,063.00
$ 2,063.00 - $ 2,063.00
$ 2,063.00
$ 1,651.00
$ 1,651.00 - $ 1,651.00
$ 1,651.00

Foster 75FSS, 3/4" Straight-Thru Coupler x 3/4" 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 75FSS is a 303 stainless 3/4" straight-th...

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$ 2,063.00
$ 2,063.00 - $ 2,063.00
$ 2,063.00
$ 1,651.00
$ 1,651.00 - $ 1,651.00
$ 1,651.00
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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 %
$ 729.00
$ 729.00 - $ 729.00
$ 729.00
$ 584.00
$ 584.00 - $ 584.00
$ 584.00

Foster 75FS-104, 3/4" Straight-Thru Coupler x 3/4" Female NPT, FST Series, Silicone Seal, Brass

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 75FS-104 is a brass 3/4" straight-thru co...

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$ 729.00
$ 729.00 - $ 729.00
$ 729.00
$ 584.00
$ 584.00 - $ 584.00
$ 584.00
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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 %
$ 700.00
$ 700.00 - $ 700.00
$ 700.00
$ 561.00
$ 561.00 - $ 561.00
$ 561.00

Foster 75FS-103, 3/4" Straight-Thru Coupler x 3/4" 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 75FS-103 is a brass 3/4" straight-thru co...

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$ 700.00
$ 700.00 - $ 700.00
$ 700.00
$ 561.00
$ 561.00 - $ 561.00
$ 561.00
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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 %
$ 713.00
$ 713.00 - $ 713.00
$ 713.00
$ 570.00
$ 570.00 - $ 570.00
$ 570.00

Foster 75FS-101, 3/4" Straight-Thru Coupler x 3/4" 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 75FS-101 is a brass 3/4" straight-thru co...

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$ 713.00
$ 713.00 - $ 713.00
$ 713.00
$ 570.00
$ 570.00 - $ 570.00
$ 570.00
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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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$ 628.00
$ 628.00 - $ 628.00
$ 628.00
$ 503.00
$ 503.00 - $ 503.00
$ 503.00

Foster 75FS, 3/4" Straight-Thru Coupler x 3/4" Female NPT, FST Series, Brass

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 75FS is a brass 3/4" straight-thru couple...

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$ 628.00
$ 628.00 - $ 628.00
$ 628.00
$ 503.00
$ 503.00 - $ 503.00
$ 503.00
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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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$ 868.00
$ 868.00 - $ 868.00
$ 868.00
$ 693.00
$ 693.00 - $ 693.00
$ 693.00

Foster 75FPS, 3/4" Straight-Thru Plug x 3/4" 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 75FPS is a 303 stainless 3/4" straight-th...

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$ 868.00
$ 868.00 - $ 868.00
$ 868.00
$ 693.00
$ 693.00 - $ 693.00
$ 693.00
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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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$ 270.00
$ 270.00 - $ 270.00
$ 270.00
$ 217.00
$ 217.00 - $ 217.00
$ 217.00

Foster 75FPB, 3/4" Straight-Thru Plug x 3/4" Female NPT, FST Series, Brass

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 75FPB is a brass 3/4" straight-thru plug ...

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$ 270.00
$ 270.00 - $ 270.00
$ 270.00
$ 217.00
$ 217.00 - $ 217.00
$ 217.00
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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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$ 217.00
$ 217.00 - $ 217.00
$ 217.00
$ 173.00
$ 173.00 - $ 173.00
$ 173.00

Foster 75FP, 3/4" Straight-Thru Plug x 3/4" Female NPT, FST Series, Steel

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 75FP is a steel 3/4" straight-thru plug i...

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$ 217.00
$ 217.00 - $ 217.00
$ 217.00
$ 173.00
$ 173.00 - $ 173.00
$ 173.00
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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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$ 1,450.00
$ 1,450.00 - $ 1,450.00
$ 1,450.00
$ 1,161.00
$ 1,161.00 - $ 1,161.00
$ 1,161.00

Foster 50FSS-103, 1/2" Straight-Thru Coupler x 1/2" 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 50FSS-103 is a 303 stainless 1/2" straigh...

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$ 1,450.00
$ 1,450.00 - $ 1,450.00
$ 1,450.00
$ 1,161.00
$ 1,161.00 - $ 1,161.00
$ 1,161.00
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 1,425.00
$ 1,425.00 - $ 1,425.00
$ 1,425.00
$ 1,141.00
$ 1,141.00 - $ 1,141.00
$ 1,141.00

Foster 50FSS-101, 1/2" Straight-Thru Coupler x 1/2" 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 50FSS-101 is a 303 stainless 1/2" straigh...

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$ 1,425.00
$ 1,425.00 - $ 1,425.00
$ 1,425.00
$ 1,141.00
$ 1,141.00 - $ 1,141.00
$ 1,141.00
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 1,376.00
$ 1,376.00 - $ 1,376.00
$ 1,376.00
$ 1,101.00
$ 1,101.00 - $ 1,101.00
$ 1,101.00

Foster 50FSS, 1/2" Straight-Thru Coupler x 1/2" 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 50FSS is a 303 stainless 1/2" straight-th...

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$ 1,376.00
$ 1,376.00 - $ 1,376.00
$ 1,376.00
$ 1,101.00
$ 1,101.00 - $ 1,101.00
$ 1,101.00
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 438.00
$ 438.00 - $ 438.00
$ 438.00
$ 351.00
$ 351.00 - $ 351.00
$ 351.00

Foster 50FS-103, 1/2" Straight-Thru Coupler x 1/2" 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 50FS-103 is a brass 1/2" straight-thru co...

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$ 438.00
$ 438.00 - $ 438.00
$ 438.00
$ 351.00
$ 351.00 - $ 351.00
$ 351.00
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 445.00
$ 445.00 - $ 445.00
$ 445.00
$ 357.00
$ 357.00 - $ 357.00
$ 357.00

Foster 50FS-101, 1/2" Straight-Thru Coupler x 1/2" 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 50FS-101 is a brass 1/2" straight-thru co...

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$ 445.00
$ 445.00 - $ 445.00
$ 445.00
$ 357.00
$ 357.00 - $ 357.00
$ 357.00
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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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$ 392.00
$ 392.00 - $ 392.00
$ 392.00
$ 314.00
$ 314.00 - $ 314.00
$ 314.00

Foster 50FS, 1/2" Straight-Thru Coupler x 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 50FS is a brass 1/2" straight-thru couple...

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$ 392.00
$ 392.00 - $ 392.00
$ 392.00
$ 314.00
$ 314.00 - $ 314.00
$ 314.00
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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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$ 623.00
$ 623.00 - $ 623.00
$ 623.00
$ 498.00
$ 498.00 - $ 498.00
$ 498.00

Foster 50FPS, 1/2" Straight-Thru Plug x 1/2" 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 50FPS is a 303 stainless 1/2" straight-th...

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$ 623.00
$ 623.00 - $ 623.00
$ 623.00
$ 498.00
$ 498.00 - $ 498.00
$ 498.00
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 %
$ 147.00
$ 147.00 - $ 147.00
$ 147.00
$ 117.00
$ 117.00 - $ 117.00
$ 117.00

Foster 50FPB, 1/2" Straight-Thru Plug x 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 50FPB is a brass 1/2" straight-thru plug ...

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$ 147.00
$ 147.00 - $ 147.00
$ 147.00
$ 117.00
$ 117.00 - $ 117.00
$ 117.00
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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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$ 157.00
$ 157.00 - $ 157.00
$ 157.00
$ 126.00
$ 126.00 - $ 126.00
$ 126.00

Foster 50FP, 1/2" Straight-Thru Plug x 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 50FP is a steel 1/2" straight-thru plug i...

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$ 157.00
$ 157.00 - $ 157.00
$ 157.00
$ 126.00
$ 126.00 - $ 126.00
$ 126.00
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Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
Save 19% Save %
$ 155.00
$ 155.00 - $ 155.00
$ 155.00
$ 126.00
$ 126.00 - $ 126.00
$ 126.00

Foster 38HPB, 3/8" Straight-Thru Plug x 3/8" Hose ID, FST Series, Brass

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 38HPB is a brass 3/8" straight-thru plug ...

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$ 155.00
$ 155.00 - $ 155.00
$ 155.00
$ 126.00
$ 126.00 - $ 126.00
$ 126.00
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 %
$ 1,251.00
$ 1,251.00 - $ 1,251.00
$ 1,251.00
$ 1,000.00
$ 1,000.00 - $ 1,000.00
$ 1,000.00

Foster 38FSS-103, 3/8" Straight-Thru Coupler x 3/8" 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 38FSS-103 is a 303 stainless 3/8" straigh...

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$ 1,251.00
$ 1,251.00 - $ 1,251.00
$ 1,251.00
$ 1,000.00
$ 1,000.00 - $ 1,000.00
$ 1,000.00
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 1,258.00
$ 1,258.00 - $ 1,258.00
$ 1,258.00
$ 1,005.00
$ 1,005.00 - $ 1,005.00
$ 1,005.00

Foster 38FSS-101, 3/8" Straight-Thru Coupler x 3/8" 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 38FSS-101 is a 303 stainless 3/8" straigh...

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$ 1,258.00
$ 1,258.00 - $ 1,258.00
$ 1,258.00
$ 1,005.00
$ 1,005.00 - $ 1,005.00
$ 1,005.00
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 1,249.00
$ 1,249.00 - $ 1,249.00
$ 1,249.00
$ 998.00
$ 998.00 - $ 998.00
$ 998.00

Foster 38FSS, 3/8" Straight-Thru Coupler x 3/8" 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 38FSS is a 303 stainless 3/8" straight-th...

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$ 1,249.00
$ 1,249.00 - $ 1,249.00
$ 1,249.00
$ 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
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$ 325.00
$ 325.00 - $ 325.00
$ 325.00
$ 260.00
$ 260.00 - $ 260.00
$ 260.00

Foster 38FS-103, 3/8" Straight-Thru Coupler x 3/8" 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 38FS-103 is a brass 3/8" straight-thru co...

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$ 325.00
$ 325.00 - $ 325.00
$ 325.00
$ 260.00
$ 260.00 - $ 260.00
$ 260.00
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 339.00
$ 339.00 - $ 339.00
$ 339.00
$ 270.00
$ 270.00 - $ 270.00
$ 270.00

Foster 38FS-101, 3/8" Straight-Thru Coupler x 3/8" 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 38FS-101 is a brass 3/8" straight-thru co...

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$ 339.00
$ 339.00 - $ 339.00
$ 339.00
$ 270.00
$ 270.00 - $ 270.00
$ 270.00
Save 20% Save %
Foster BLH1B, 1/8" ISO-B Hydraulic Coupler x 1/8" Female NPT, ISO-B Series, Ball Lock, Brass
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$ 279.00
$ 279.00 - $ 279.00
$ 279.00
$ 224.00
$ 224.00 - $ 224.00
$ 224.00

Foster 38FS, 3/8" Straight-Thru Coupler x 3/8" Female NPT, FST Series, Brass

Maximum flow with no restriction, for air and fluid lines where shut-off is handled elsewhere. The Foster 38FS is a brass 3/8" straight-thru couple...

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$ 279.00
$ 279.00 - $ 279.00
$ 279.00
$ 224.00
$ 224.00 - $ 224.00
$ 224.00
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