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Foster Products

ZSi Products



ISO A Series (Conforms with ISO 7241-1, Series A)
Sizes and Pricing

Sizes and Pricing

Sizes and Pricing

Dust Plug, Dust Cap
Dust Plug/Cap Combination
Material: Rubber


  • ISO A Series couplings feature poppet valves with solid metal perch that maintains valve alignment and prevents flow checking. Both the sleeves of the socket and plug are case hardened to make the couplings resistant to damage from brinelling and mechanical shock.

  • The durable ball-locking mechanism ensures a reliable connection every time.

  • These couplings have female pipe and straight thread end configurations as standard. The dimensional requirements of Series A in ISO 7241-1. Socket and plug are interchangeable with other parts compatible with ISO 7241-1.

Applications:The versatile ISO A Series couplings are used in a wide range of hydraulic applications including construction equipment, manufacturing machinery, and in-plant systems. They can be found anywhere the fluid transfer lines need to be connected and disconnected for operation or maintenance of equipment. Rugged construction makes it a good choice for mobile applications including dump trucks, snow plows, refuse hauling, mining, asphalt paving, truck trailer connections and many more. In-plant machinery applications include hydraulic fluid, chemicals and gas lines for paper mills, steel production, and many varieties of plant maintenance and production equipment.

Note: Foster approved components (May be imported)


Rated Pressure (PSI) / Working Pressure:

  • 1/4"- 5,000

  • 3/8", 1/2", 3/4", 1" - 4,000

Temperature Range (std seals): -40° to +250° F.