Groz Heavy Duty 4 Jaw Coupler – GZ43500 | Professional Grease Gun Hydraulic Coupler

The Groz Heavy Duty 4 Jaw Coupler – GZ43500 is a professional-grade hydraulic grease coupler designed to provide a secure, leak-proof connection between your grease gun and standard grease nipples (Zerk fittings). Manufactured from hardened steel with a 4-jaw design and integrated ball check valve, this heavy-duty coupler delivers reliable performance under high-pressure greasing applications, making it ideal for automotive, agricultural, commercial and industrial maintenance. It is designed for use with hand-operated grease guns and is capable of handling pressures up to 6,000 PSI (413 Bar).

The GZ43500 features fully hardened spring steel jaws that grip grease fittings securely to minimise grease leakage and ensure efficient lubrication. Its durable construction resists wear and deformation, while the hexagonal body allows for easy tightening and removal. Whether servicing cars, HGVs, tractors, construction machinery or industrial equipment, this Groz grease coupler delivers dependable, mess-free lubrication every time.

Key Features

• Part Number: GZ43500
• Genuine Groz heavy-duty hydraulic grease coupler
• 4-jaw design for a secure, leak-proof connection
• Integrated ball check valve retains grease pressure
• Hardened steel body for long service life
• Fully hardened spring steel jaws
• Suitable for standard grease nipples (Zerk fittings)
• Hexagonal body for easy installation and removal
• For use with hand-operated grease guns
• Maximum working pressure: 6,000 PSI (413 Bar)

Specifications

Product: Heavy Duty 4 Jaw Grease Coupler

Manufacturer: Groz

Part Number: GZ43500

Design: 4 Jaw

Thread: 1/8" BSPT

Maximum Pressure: 6,000 PSI (413 Bar)

Ball Check Valve: Yes

Application: Hand-Operated Grease Guns

Ideal Applications

Suitable for:

• Grease guns
• Automotive servicing
• Agricultural machinery
• Tractors
• Construction equipment
• HGVs and commercial vehicles
• Plant machinery
• Industrial maintenance
• Workshops
• Fleet maintenance

Benefits

• Provides a secure, leak-free connection
• Minimises grease waste and mess
• Withstands high-pressure greasing applications
• Durable hardened steel construction
• Easy to fit and remove
• Improves lubrication efficiency
• Long service life in demanding environments
• Suitable for professional workshop use

Why Choose the Groz Heavy Duty 4 Jaw Coupler GZ43500?

The Groz Heavy Duty 4 Jaw Coupler – GZ43500 is engineered for professionals who demand reliable, high-pressure lubrication performance. Its hardened steel construction, precision 4-jaw grip and integrated ball check valve ensure efficient grease delivery with minimal leakage. Ideal for automotive workshops, agricultural machinery, commercial fleets and industrial maintenance, this genuine Groz coupler is built to withstand the toughest lubrication tasks while delivering consistent performance.

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