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Foster 3 Series Couplers

The Foster 3 Series is the 1/4" body industrial interchange, the most popular air coupler size for shop and industrial systems. This collection includes 3 Series couplers and plugs in brass, steel, and stainless with NPT, hose barb, push-on, and reusable terminations, plus automatic, sleeve guard, ball check, and dust cap options. Filter by thread, material, and coupler or plug to match your line.

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$ 19.19
$ 19.19 - $ 19.19
$ 19.19
$ 15.29
$ 15.29 - $ 15.29
$ 15.29

Foster 2803, 3 Series, Industrial Coupler, Manual, 1/8" Female NPT, Brass, Steel

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 2803 is a Brass/Steel 1/4" industrial coupler from the Foster 3 Series — t...

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$ 19.19
$ 19.19 - $ 19.19
$ 19.19
$ 15.29
$ 15.29 - $ 15.29
$ 15.29
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$ 16.39
$ 16.39 - $ 16.39
$ 16.39
$ 13.19
$ 13.19 - $ 13.19
$ 13.19

Foster 2903, 3 Series, Industrial Coupler, Manual, 1/8" Male NPT, Brass, Steel

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 2903 is a Brass/Steel 1/4" industrial coupler from the Foster 3 Series — t...

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$ 16.39
$ 16.39 - $ 16.39
$ 16.39
$ 13.19
$ 13.19 - $ 13.19
$ 13.19
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$ 67.39
$ 67.39 - $ 67.39
$ 67.39
$ 53.89
$ 53.89 - $ 53.89
$ 53.89

Foster 3603S/S, 3 Series, Industrial Coupler, Manual, 1/4" Hose Barb, Stainless Steel

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 3603S/S is a 303 Stainless 1/4" industrial coupler from the Foster 3 Serie...

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$ 67.39
$ 67.39 - $ 67.39
$ 67.39
$ 53.89
$ 53.89 - $ 53.89
$ 53.89
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$ 21.39
$ 21.39 - $ 21.39
$ 21.39
$ 17.09
$ 17.09 - $ 17.09
$ 17.09

Foster FM1513, 3 Series, Industrial Coupler, Automatic, 1/4" Push-On Hose Barb, Brass

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster FM1513 is a Brass 1/4" industrial coupler from the Foster 3 Series — the m...

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$ 21.39
$ 21.39 - $ 21.39
$ 21.39
$ 17.09
$ 17.09 - $ 17.09
$ 17.09
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$ 22.29
$ 22.29 - $ 22.29
$ 22.29
$ 17.79
$ 17.79 - $ 17.79
$ 17.79

Foster 3303GS, 3 Series, Industrial Coupler, Automatic, 3/8" Male NPT, Brass, Steel

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 3303GS is a Steel 1/4" industrial coupler from the Foster 3 Series — the m...

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$ 22.29
$ 22.29 - $ 22.29
$ 22.29
$ 17.79
$ 17.79 - $ 17.79
$ 17.79
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$ 25.69
$ 25.69 - $ 25.69
$ 25.69
$ 20.49
$ 20.49 - $ 20.49
$ 20.49

Foster 2803GB, 3 Series, Industrial Coupler, Automatic, 1/8" Female NPT, Brass

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 2803GB is a Brass 1/4" industrial coupler from the Foster 3 Series — the m...

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$ 25.69
$ 25.69 - $ 25.69
$ 25.69
$ 20.49
$ 20.49 - $ 20.49
$ 20.49
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$ 3.39
$ 3.39 - $ 3.39
$ 3.39
$ 2.69
$ 2.69 - $ 2.69
$ 2.69

Foster 16-3, 3 Series, Industrial Plug, 1/4" Hose Barb, Steel

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 16-3 is a Steel 1/4" industrial plug from the Foster 3 Series — the most p...

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$ 3.39
$ 3.39 - $ 3.39
$ 3.39
$ 2.69
$ 2.69 - $ 2.69
$ 2.69
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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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$ 7.29
$ 7.29 - $ 7.29
$ 7.29
$ 5.79
$ 5.79 - $ 5.79
$ 5.79

Foster PB3-3, 1/4" Industrial Plug x Reusable Hose Fitting, 1/4" ID x 1/2" OD, 3 Series, Steel

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster PB3-3 is a Steel 1/4" industrial plug from the Foster 3 Series — the most ...

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$ 7.29
$ 7.29 - $ 7.29
$ 7.29
$ 5.79
$ 5.79 - $ 5.79
$ 5.79
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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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$ 19.79
$ 19.79 - $ 19.79
$ 19.79
$ 15.89
$ 15.89 - $ 15.89
$ 15.89

Foster SB3-3, 1/4" Industrial Coupler x Reusable Hose Fitting, 1/4" ID x 1/2" OD, 3 Series, Brass/Steel

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster SB3-3 is a Brass/Steel 1/4" industrial coupler from the Foster 3 Series — ...

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$ 19.79
$ 19.79 - $ 19.79
$ 19.79
$ 15.89
$ 15.89 - $ 15.89
$ 15.89
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$ 28.79
$ 28.79 - $ 28.79
$ 28.79
$ 23.09
$ 23.09 - $ 23.09
$ 23.09

Foster 3603GB, 3 Series, Industrial Coupler, Automatic, 1/4" Hose Barb, Brass

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 3603GB is a Brass 1/4" industrial coupler from the Foster 3 Series — the m...

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$ 28.79
$ 28.79 - $ 28.79
$ 28.79
$ 23.09
$ 23.09 - $ 23.09
$ 23.09
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$ 14.89
$ 14.89 - $ 14.89
$ 14.89
$ 11.89
$ 11.89 - $ 11.89
$ 11.89

Foster SG1513, 3 Series, Industrial Coupler, Manual, Sleeve Guard, 1/4" Push-On Hose Barb, Brass

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster SG1513 is a Brass 1/4" industrial coupler from the Foster 3 Series — the m...

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$ 14.89
$ 14.89 - $ 14.89
$ 14.89
$ 11.89
$ 11.89 - $ 11.89
$ 11.89
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$ 21.49
$ 21.49 - $ 21.49
$ 21.49
$ 17.19
$ 17.19 - $ 17.19
$ 17.19

Foster SG2803, 3 Series, Industrial Coupler, Manual, Sleeve Guard, 1/8" Female NPT, Brass

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster SG2803 is a Brass 1/4" industrial coupler from the Foster 3 Series — the m...

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$ 21.49
$ 21.49 - $ 21.49
$ 21.49
$ 17.19
$ 17.19 - $ 17.19
$ 17.19
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$ 17.69
$ 17.69 - $ 17.69
$ 17.69
$ 14.09
$ 14.09 - $ 14.09
$ 14.09

Foster SG2903, 3 Series, Industrial Coupler, Manual, Sleeve Guard, 1/8" Male NPT, Brass

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster SG2903 is a Brass 1/4" industrial coupler from the Foster 3 Series — the m...

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$ 17.69
$ 17.69 - $ 17.69
$ 17.69
$ 14.09
$ 14.09 - $ 14.09
$ 14.09
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$ 15.99
$ 15.99 - $ 15.99
$ 15.99
$ 12.79
$ 12.79 - $ 12.79
$ 12.79

Foster 1513, 3 Series, Industrial Coupler, Manual, 1/4" Hose Barb (Push-On), Brass, Steel

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 1513 is a Brass/Steel 1/4" industrial coupler from the Foster 3 Series — t...

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$ 15.99
$ 15.99 - $ 15.99
$ 15.99
$ 12.79
$ 12.79 - $ 12.79
$ 12.79
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$ 17.09
$ 17.09 - $ 17.09
$ 17.09
$ 13.69
$ 13.69 - $ 13.69
$ 13.69

Foster 3653, 3 Series, Industrial Coupler, Manual, 5/16" Hose Barb, Brass, Steel

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 3653 is a Brass/Steel 1/4" industrial coupler from the Foster 3 Series — t...

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$ 17.09
$ 17.09 - $ 17.09
$ 17.09
$ 13.69
$ 13.69 - $ 13.69
$ 13.69
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$ 44.99
$ 44.99 - $ 44.99
$ 44.99
$ 35.99
$ 35.99 - $ 35.99
$ 35.99

Foster 3103S/S, 3 Series, Industrial Coupler, Manual, 1/4" Male NPT, Stainless Steel

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 3103S/S is a 303 Stainless 1/4" industrial coupler from the Foster 3 Serie...

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$ 44.99
$ 44.99 - $ 44.99
$ 44.99
$ 35.99
$ 35.99 - $ 35.99
$ 35.99
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$ 44.59
$ 44.59 - $ 44.59
$ 44.59
$ 35.69
$ 35.69 - $ 35.69
$ 35.69

Foster 17-3S/S, 3 Series, Industrial Plug, 3/8" Hose Barb, Stainless Steel

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 17-3S/S is a 303 Stainless 1/4" industrial plug from the Foster 3 Series —...

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$ 44.59
$ 44.59 - $ 44.59
$ 44.59
$ 35.69
$ 35.69 - $ 35.69
$ 35.69
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$ 9.79
$ 9.79 - $ 9.79
$ 9.79
$ 7.79
$ 7.79 - $ 7.79
$ 7.79

Foster 12S-3, 3 Series, Industrial Swivel Plug, 1/8" Male NPT, Steel, Brass

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 12S-3 is a Brass/Steel 1/4" industrial plug from the Foster 3 Series — the...

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$ 9.79
$ 9.79 - $ 9.79
$ 9.79
$ 7.79
$ 7.79 - $ 7.79
$ 7.79
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$ 27.49
$ 27.49 - $ 27.49
$ 27.49
$ 21.99
$ 21.99 - $ 21.99
$ 21.99

Foster 14S-3, 3 Series, Industrial Swivel Plug, 3/8" Male NPT, Steel, Brass

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 14S-3 is a Brass/Steel 1/4" industrial plug from the Foster 3 Series — the...

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$ 27.49
$ 27.49 - $ 27.49
$ 27.49
$ 21.99
$ 21.99 - $ 21.99
$ 21.99
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$ 66.39
$ 66.39 - $ 66.39
$ 66.39
$ 53.09
$ 53.09 - $ 53.09
$ 53.09

Foster 3203S/S, 3 Series, Industrial Coupler, Manual, 3/8" Female NPT, Stainless Steel

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 3203S/S is a 303 Stainless 1/4" industrial coupler from the Foster 3 Serie...

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$ 66.39
$ 66.39 - $ 66.39
$ 66.39
$ 53.09
$ 53.09 - $ 53.09
$ 53.09
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$ 68.79
$ 68.79 - $ 68.79
$ 68.79
$ 55.09
$ 55.09 - $ 55.09
$ 55.09

Foster 3703S/S, 3 Series, Industrial Coupler, Manual, 3/8" Hose Barb, Stainless Steel

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 3703S/S is a 303 Stainless 1/4" industrial coupler from the Foster 3 Serie...

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$ 68.79
$ 68.79 - $ 68.79
$ 68.79
$ 55.09
$ 55.09 - $ 55.09
$ 55.09
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$ 23.19
$ 23.19 - $ 23.19
$ 23.19
$ 18.59
$ 18.59 - $ 18.59
$ 18.59

Foster FM3653, 3 Series, Industrial Coupler, Automatic, 5/16" Hose Barb, Brass

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster FM3653 is a Brass 1/4" industrial coupler from the Foster 3 Series — the m...

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$ 23.19
$ 23.19 - $ 23.19
$ 23.19
$ 18.59
$ 18.59 - $ 18.59
$ 18.59
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$ 29.69
$ 29.69 - $ 29.69
$ 29.69
$ 23.79
$ 23.79 - $ 23.79
$ 23.79

Foster 2803GS, 3 Series, Industrial Coupler, Automatic, 1/8" Female NPT, Brass, Steel

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 2803GS is a Steel 1/4" industrial coupler from the Foster 3 Series — the m...

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$ 29.69
$ 29.69 - $ 29.69
$ 29.69
$ 23.79
$ 23.79 - $ 23.79
$ 23.79
Save 20% Save %
Save 20% Save %
$ 16.39
$ 16.39 - $ 16.39
$ 16.39
$ 13.19
$ 13.19 - $ 13.19
$ 13.19

Foster 2903GS, 3 Series, Industrial Coupler, Automatic, 1/8" Male NPT, Brass, Steel

Reliable, leak-free 1/4" connections for air and fluid lines. The Foster 2903 is a Brass/Steel 1/4" industrial coupler from the Foster 3 Series — t...

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$ 16.39
$ 16.39 - $ 16.39
$ 16.39
$ 13.19
$ 13.19 - $ 13.19
$ 13.19
Save 20% Save %

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