A coupling claw is a quick-connect hose coupling commonly used for compressed air and water transfer in industrial, construction, and agricultural applications. In the U.S. market, coupling claw systems are widely recognized for their simple connection method, durability, and interchangeability.
Claw couplings consist of two identical halves—there is no distinction between a coupler and an adapter. Each half features two claws (lugs) that engage with the opposite side. Connection is achieved by simply pushing the two parts together and rotating them, making installation fast and tool-free.
However, only coupling claw products of the same type and the same claw distance can be interconnected.
Claw Couplings – General Information
Coupling claw products are broadly used for:
- Compressed air systems
- Water transfer systems
- Pneumatic tools and equipment
They are commonly applied in:
- Industrial facilities
- Construction sites
- Workshops
- Agriculture and horticulture
Common Claw Distances
Coupling claw systems are divided into the following standards:
- 42 mm claw distance – industrial compressed air couplings
- 41 mm claw distance – U.S. compressed air standard (Chicago / Air King type)
- 40 mm claw distance – water couplings, also known as GEKA type
Coupling claw products are typically manufactured from:
- Zinc-plated cast iron
- Brass
- Stainless steel
All couplings are equipped with oil-resistant NBR rubber seals as standard. For stainless steel coupling claw products, Viton (FKM) seals are commonly used.
Jizhong Coupling Claw Manufacturing Capability
Jizhong is an experienced manufacturer of coupling claw products for global B2B markets. With export-oriented production and standardized dimensional control, Jizhong supplies coupling claw solutions suitable for distributors, OEM customers, and project-based procurement.
Jizhong coupling claw products are designed to meet common international and U.S. standards, with stable sealing performance and consistent material quality. The product range supports compressed air and water applications across industrial and construction environments.
Product Range of Coupling Claw
Jizhong coupling claw product range includes:
- Coupling claw with hose tail (hose size from 10 mm to 38 mm)
- Coupling claw with male or female thread
- Blank caps
- Y fittings fitted with coupling claw
Coupling claw products are assembled to hoses using malleable iron hose clamps or other industrial-grade clamps.
Applications of Coupling Claw Systems
Coupling claw products are commonly used for:
- Compressed air transfer
- Connecting pneumatic tools and pneumatic systems
- Industrial water systems
- Construction sites
- Agriculture and horticulture
1. Coupling Claw 42 mm
The 42 mm coupling claw is mainly designed for compressed air applications.
Available versions include:
- Zinc-plated cast iron coupling claw, working pressure 10 bar, with oil-resistant NBR seal
- Zinc-plated cast iron coupling claw with brass sealing ring and flexible rubber backing for easier connection
- Zinc-plated cast iron coupling claw, working pressure 16 bar, with oil-resistant NBR seal and safety locking ring to prevent accidental disconnection
- Brass coupling claw, working pressure 10 bar, with NBR seal
- Stainless steel coupling claw, working pressure 16 bar, with Viton seal
Available configurations:
- Hose tail coupling claw (including versions with retaining collar)
- Male or female threaded coupling claw
- Y fittings with coupling claw
- Blank caps
- Replacement seals
The 42 mm coupling claw is widely used for compressed air systems in industrial plants, workshops, and construction sites.
2. Coupling Claw 41 mm – U.S. Standard
The 41 mm coupling claw is the standard type used in the United States and is commonly referred to as Chicago or Air King type.
Features
- Zinc-plated cast iron construction
- Oil-resistant rubber seal
- Pin holes for safety pins
- Working pressure: 10 bar (145 psi)
Available coupling claw types:
- Hose tail coupling claw with safety lock collar
- NPT female thread coupling claw
- NPT male thread coupling claw
- Blank caps
This coupling claw type is commonly used in U.S. construction and industrial compressed air systems.
3. Coupling Claw 40 mm – GEKA Type
The 40 mm coupling claw, also known as GEKA type, is primarily used for water transfer.
Applications
- Industrial water systems
- Construction sites
- Agriculture and irrigation
- Gardening
Specifications
- Standard material: forged brass
- Optional material: stainless steel
- Working pressure: up to 16 bar (10 bar for certain types)
- Seal: NBR (Viton for stainless steel)
Available products include:
- Hose tail coupling claw (including safety locking ring and 360° swivel versions)
- Male or female threaded coupling claw
- Y fittings with coupling claw
- Water nozzles
- Blank caps
- Replacement seals
FAQ About Coupling Claw
Is the claw distance important for coupling claw products?
Yes. Claw distance is a key factor. Only coupling claw products with the same claw distance can be connected. The most common standards are 42 mm, 41 mm, and 40 mm (GEKA type). Couplings with different claw distances must never be connected.
Does the material of the coupling claw matter?
Yes. The coupling claw material should be selected based on the working medium and environment. Zinc-plated cast iron, brass, and stainless steel are the most common materials. Seal selection (NBR or Viton) is also important for reliable performance.
How are coupling claw products connected?
Coupling claw products with the same standard are connected by pressing the two halves together and rotating them until the claws engage securely. No tools are required.
