Pneumatic Quick Couplers
Pneumatic quick couplers connect and disconnect air lines in one quick motion, no tools required. This collection covers the full range of air quick couplers and plugs across every interchange, from miniature 2 Series to industrial body sizes, in steel, brass, and stainless. Filter by series, body size, thread, and material to find the exact coupler or plug your air system needs.
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Original price $ 20.39Original price $ 20.39 - Original price $ 20.39Original price $ 20.39Current price $ 16.29$ 16.29 - $ 16.29Current price $ 16.29
Foster PD13-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 13/16" OD, 4 Series, Steel
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster PD13-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-f...
View full detailsOriginal price $ 20.39Original price $ 20.39 - Original price $ 20.39Original price $ 20.39Current price $ 16.29$ 16.29 - $ 16.29Current price $ 16.29Save 20% -
Original price $ 15.69Original price $ 15.69 - Original price $ 15.69Original price $ 15.69Current price $ 12.59$ 12.59 - $ 12.59Current price $ 12.59
Foster PD11-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 3/4" OD, 4 Series, Steel
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster PD11-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-f...
View full detailsOriginal price $ 15.69Original price $ 15.69 - Original price $ 15.69Original price $ 15.69Current price $ 12.59$ 12.59 - $ 12.59Current price $ 12.59Save 20% -
Original price $ 14.39Original price $ 14.39 - Original price $ 14.39Original price $ 14.39Current price $ 11.49$ 11.49 - $ 11.49Current price $ 11.49
Foster PD9-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 11/16" OD, 4 Series, Steel
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster PD9-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-fl...
View full detailsOriginal price $ 14.39Original price $ 14.39 - Original price $ 14.39Original price $ 14.39Current price $ 11.49$ 11.49 - $ 11.49Current price $ 11.49Save 20% -
Original price $ 14.29Original price $ 14.29 - Original price $ 14.29Original price $ 14.29Current price $ 11.39$ 11.39 - $ 11.39Current price $ 11.39
Foster PD7-4, 3/8" Industrial Plug x Reusable Hose Fitting, 3/8" ID x 5/8" OD, 4 Series, Steel
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster PD7-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-fl...
View full detailsOriginal price $ 14.29Original price $ 14.29 - Original price $ 14.29Original price $ 14.29Current price $ 11.39$ 11.39 - $ 11.39Current price $ 11.39Save 20% -
Original price $ 15.79Original price $ 15.79 - Original price $ 15.79Original price $ 15.79Current price $ 12.69$ 12.69 - $ 12.69Current price $ 12.69
Foster PB7-4, 3/8" Industrial Plug x Reusable Hose Fitting, 1/4" ID x 5/8" OD, 4 Series, Steel
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster PB7-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-fl...
View full detailsOriginal price $ 15.79Original price $ 15.79 - Original price $ 15.79Original price $ 15.79Current price $ 12.69$ 12.69 - $ 12.69Current price $ 12.69Save 20% -
Original price $ 13.89Original price $ 13.89 - Original price $ 13.89Original price $ 13.89Current price $ 11.09$ 11.09 - $ 11.09Current price $ 11.09
Foster PB5-4, 3/8" Industrial Plug x Reusable Hose Fitting, 1/4" ID x 9/16" OD, 4 Series, Steel
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster PB5-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-fl...
View full detailsOriginal price $ 13.89Original price $ 13.89 - Original price $ 13.89Original price $ 13.89Current price $ 11.09$ 11.09 - $ 11.09Current price $ 11.09Save 20% -
Original price $ 14.89Original price $ 14.89 - Original price $ 14.89Original price $ 14.89Current price $ 11.89$ 11.89 - $ 11.89Current price $ 11.89
Foster PB3-4, 3/8" Industrial Plug x Reusable Hose Fitting, 1/4" ID x 1/2" OD, 4 Series, Steel
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster PB3-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-fl...
View full detailsOriginal price $ 14.89Original price $ 14.89 - Original price $ 14.89Original price $ 14.89Current price $ 11.89$ 11.89 - $ 11.89Current price $ 11.89Save 20% -
Original price $ 10.79Original price $ 10.79 - Original price $ 10.79Original price $ 10.79Current price $ 8.69$ 8.69 - $ 8.69Current price $ 8.69
Foster 81-4, 3/8" Industrial Plug x 1/2" Push-On Hose Stem, 4 Series, Steel
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster 81-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-flo...
View full detailsOriginal price $ 10.79Original price $ 10.79 - Original price $ 10.79Original price $ 10.79Current price $ 8.69$ 8.69 - $ 8.69Current price $ 8.69Save 19% -
Original price $ 26.89Original price $ 26.89 - Original price $ 26.89Original price $ 26.89Current price $ 21.49$ 21.49 - $ 21.49Current price $ 21.49
Foster 71-4B, 3/8" Industrial Plug x 3/8" Push-On Hose Stem, 4 Series, Brass
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster 71-4B is a Brass 3/8" industrial plug from the Foster 4 Series — a high-fl...
View full detailsOriginal price $ 26.89Original price $ 26.89 - Original price $ 26.89Original price $ 26.89Current price $ 21.49$ 21.49 - $ 21.49Current price $ 21.49Save 20% -
Original price $ 6.39Original price $ 6.39 - Original price $ 6.39Original price $ 6.39Current price $ 5.09$ 5.09 - $ 5.09Current price $ 5.09
Foster 71-4, 3/8" Industrial Plug x 3/8" Push-On Hose Stem, 4 Series, Steel
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster 71-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-flo...
View full detailsOriginal price $ 6.39Original price $ 6.39 - Original price $ 6.39Original price $ 6.39Current price $ 5.09$ 5.09 - $ 5.09Current price $ 5.09Save 20% -
Original price $ 7.39Original price $ 7.39 - Original price $ 7.39Original price $ 7.39Current price $ 5.99$ 5.99 - $ 5.99Current price $ 5.99
Foster 51-4, 3/8" Industrial Plug x 1/4" Push-On Hose Stem, 4 Series, Steel
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster 51-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-flo...
View full detailsOriginal price $ 7.39Original price $ 7.39 - Original price $ 7.39Original price $ 7.39Current price $ 5.99$ 5.99 - $ 5.99Current price $ 5.99Save 19% -
Original price $ 6.99Original price $ 6.99 - Original price $ 6.99Original price $ 6.99Current price $ 5.59$ 5.59 - $ 5.59Current price $ 5.59
Foster 49-4, 3/8" Industrial Plug x 1/2" Hose ID, 4 Series, Steel
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster 49-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-flo...
View full detailsOriginal price $ 6.99Original price $ 6.99 - Original price $ 6.99Original price $ 6.99Current price $ 5.59$ 5.59 - $ 5.59Current price $ 5.59Save 20% -
Original price $ 9.89Original price $ 9.89 - Original price $ 9.89Original price $ 9.89Current price $ 7.99$ 7.99 - $ 7.99Current price $ 7.99
Foster 48-4B, 3/8" Industrial Plug x 3/8" Hose ID, 4 Series, Brass
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster 48-4B is a Brass 3/8" industrial plug from the Foster 4 Series — a high-fl...
View full detailsOriginal price $ 9.89Original price $ 9.89 - Original price $ 9.89Original price $ 9.89Current price $ 7.99$ 7.99 - $ 7.99Current price $ 7.99Save 19% -
Original price $ 6.29Original price $ 6.29 - Original price $ 6.29Original price $ 6.29Current price $ 4.99$ 4.99 - $ 4.99Current price $ 4.99
Foster 48-4, 3/8" Industrial Plug x 3/8" Hose ID, 4 Series, Steel
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster 48-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-flo...
View full detailsOriginal price $ 6.29Original price $ 6.29 - Original price $ 6.29Original price $ 6.29Current price $ 4.99$ 4.99 - $ 4.99Current price $ 4.99Save 21% -
Original price $ 10.39Original price $ 10.39 - Original price $ 10.39Original price $ 10.39Current price $ 8.29$ 8.29 - $ 8.29Current price $ 8.29
Foster 47-4, 3/8" Industrial Plug x 5/16" Hose ID, 4 Series, Steel
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster 47-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-flo...
View full detailsOriginal price $ 10.39Original price $ 10.39 - Original price $ 10.39Original price $ 10.39Current price $ 8.29$ 8.29 - $ 8.29Current price $ 8.29Save 20% -
Original price $ 8.79Original price $ 8.79 - Original price $ 8.79Original price $ 8.79Current price $ 6.99$ 6.99 - $ 6.99Current price $ 6.99
Foster 46-4, 3/8" Industrial Plug x 1/4" Hose ID, 4 Series, Steel
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster 46-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-flo...
View full detailsOriginal price $ 8.79Original price $ 8.79 - Original price $ 8.79Original price $ 8.79Current price $ 6.99$ 6.99 - $ 6.99Current price $ 6.99Save 20% -
Original price $ 17.19Original price $ 17.19 - Original price $ 17.19Original price $ 17.19Current price $ 13.69$ 13.69 - $ 13.69Current price $ 13.69
Foster 44S-4, 3/8" Industrial Plug x 1/2" Male NPT, 4 Series, Free Swivel, Brass/Steel
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster 44S-4 is a Brass/Steel 3/8" industrial plug from the Foster 4 Series — a h...
View full detailsOriginal price $ 17.19Original price $ 17.19 - Original price $ 17.19Original price $ 17.19Current price $ 13.69$ 13.69 - $ 13.69Current price $ 13.69Save 20% -
Original price $ 12.99Original price $ 12.99 - Original price $ 12.99Original price $ 12.99Current price $ 10.39$ 10.39 - $ 10.39Current price $ 10.39
Foster 42S-4, 3/8" Industrial Plug x 3/8" Male NPT, 4 Series, Free Swivel, Brass/Steel
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster 42S-4 is a Brass/Steel 3/8" industrial plug from the Foster 4 Series — a h...
View full detailsOriginal price $ 12.99Original price $ 12.99 - Original price $ 12.99Original price $ 12.99Current price $ 10.39$ 10.39 - $ 10.39Current price $ 10.39Save 20% -
Original price $ 20.09Original price $ 20.09 - Original price $ 20.09Original price $ 20.09Current price $ 16.09$ 16.09 - $ 16.09Current price $ 16.09
Foster 40S-4, 3/8" Industrial Plug x 1/4" Male NPT, 4 Series, Free Swivel, Brass/Steel
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster 40S-4 is a Brass/Steel 3/8" industrial plug from the Foster 4 Series — a h...
View full detailsOriginal price $ 20.09Original price $ 20.09 - Original price $ 20.09Original price $ 20.09Current price $ 16.09$ 16.09 - $ 16.09Current price $ 16.09Save 20% -
Original price $ 6.99Original price $ 6.99 - Original price $ 6.99Original price $ 6.99Current price $ 5.59$ 5.59 - $ 5.59Current price $ 5.59
Foster 44-4, 3/8" Industrial Plug x 1/2" Male NPT, 4 Series, Steel
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster 44-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-flo...
View full detailsOriginal price $ 6.99Original price $ 6.99 - Original price $ 6.99Original price $ 6.99Current price $ 5.59$ 5.59 - $ 5.59Current price $ 5.59Save 20% -
Original price $ 14.49Original price $ 14.49 - Original price $ 14.49Original price $ 14.49Current price $ 11.59$ 11.59 - $ 11.59Current price $ 11.59
Foster 42-4S/S, 3/8" Industrial Plug x 3/8" Male NPT, 4 Series, 303 Stainless
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster 42-4S/S is a 303 Stainless 3/8" industrial plug from the Foster 4 Series —...
View full detailsOriginal price $ 14.49Original price $ 14.49 - Original price $ 14.49Original price $ 14.49Current price $ 11.59$ 11.59 - $ 11.59Current price $ 11.59Save 20% -
Original price $ 8.99Original price $ 8.99 - Original price $ 8.99Original price $ 8.99Current price $ 7.19$ 7.19 - $ 7.19Current price $ 7.19
Foster 42-4B, 3/8" Industrial Plug x 3/8" Male NPT, 4 Series, Brass
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster 42-4B is a Brass 3/8" industrial plug from the Foster 4 Series — a high-fl...
View full detailsOriginal price $ 8.99Original price $ 8.99 - Original price $ 8.99Original price $ 8.99Current price $ 7.19$ 7.19 - $ 7.19Current price $ 7.19Save 20% -
Original price $ 4.99Original price $ 4.99 - Original price $ 4.99Original price $ 4.99Current price $ 3.99$ 3.99 - $ 3.99Current price $ 3.99
Foster 42-4, 3/8" Industrial Plug x 3/8" Male NPT, 4 Series, Steel
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster 42-4 is a Steel 3/8" industrial plug from the Foster 4 Series — a high-flo...
View full detailsOriginal price $ 4.99Original price $ 4.99 - Original price $ 4.99Original price $ 4.99Current price $ 3.99$ 3.99 - $ 3.99Current price $ 3.99Save 20% -
Original price $ 10.49Original price $ 10.49 - Original price $ 10.49Original price $ 10.49Current price $ 8.39$ 8.39 - $ 8.39Current price $ 8.39
Foster 40-4S/S, 3/8" Industrial Plug x 1/4" Male NPT, 4 Series, 303 Stainless
In stockReliable, leak-free 3/8" connections for air and fluid lines. The Foster 40-4S/S is a 303 Stainless 3/8" industrial plug from the Foster 4 Series —...
View full detailsOriginal price $ 10.49Original price $ 10.49 - Original price $ 10.49Original price $ 10.49Current price $ 8.39$ 8.39 - $ 8.39Current price $ 8.39Save 20%
