Dust Caps are not designed for pressure applications.
Items
Cam and Groove - Dust Cap Coupler

Cam and Groove - Dust Cap Coupler

Cam and Groove - Dust Cap Coupler

Cam and Groove - Dust Cap Coupler

Cam and Groove - Dust Cap Coupler

Cam and Groove - Dust Cap Coupler

Cam and Groove - Dust Cap Coupler

Cam and Groove - Dust Cap Coupler

Cam and Groove - Dust Cap Coupler

Cam and Groove - Dust Cap Coupler
Size (in.) N/A 3/4 N/A 1 N/A 1 1/4 N/A 1 1/2 N/A 2
Material N/A 356 T6 Aluminum
Handles N/A Brass
Pins N/A 304 Stainless
Gasket N/A Buna-N
Manufacturer N/A Seal Fast, Inc.