Hose Clamp Norma 50–70 mm, stainless steel worm-drive, model 73571

Norma worm-drive hose clamp model 73571 is a stainless steel adjustable clamp with a clamping range of 50–70 mm designed for secure fastening of hoses, pipes and ducts to fittings. The clamp uses a worm gear mechanism to provide gradual, reliable tightening and corrosion-resistant performance from stainless steel construction. It is intended for automotive, plumbing and light industrial applications where a durable, adjustable solution is required to prevent leaks and maintain tight connections.

Advantages

The stainless steel construction offers corrosion resistance and long service life in wet or humid environments. The worm-drive mechanism enables precise adjustment and even distribution of clamping force around the hose or pipe, reducing the risk of damage to flexible materials. Its 50–70 mm range covers a variety of common hose diameters, allowing one clamp to be used across multiple installation sizes and reducing the need for multiple spare parts.

Suitable for

• Securing coolant, fuel and vacuum hoses in automotive maintenance and repair
• Connecting flexible hoses to fittings in plumbing and sanitary systems
• Attaching air ducts, ventilation hoses and small industrial tubing
• Temporary or semi-permanent hose connections during equipment servicing

Key specifications

• Clamping range: 50–70 mm
• Material: stainless steel
• Drive type: worm gear (screw-tightened)
• Application types: automotive, plumbing, light industrial
• Adjustment: continuous within range for precise tightening

How to use

Position the clamp around the hose or duct so the band sits evenly over the fitting or barb. Ensure the hose is fully seated on the fitting before tightening. Use an appropriate screwdriver or nut driver to turn the worm-drive screw clockwise until the desired compression and seal are achieved, avoiding over-tightening that could cut into the hose material. To remove or reposition, turn the screw counterclockwise to loosen the band and slide the clamp off.

Usage recommendations

Inspect the hose and fitting surfaces for damage or debris before installation. Select the correct position on the hose to achieve even compression and check the tightened connection periodically for signs of loosening or corrosion, particularly in automotive cooling or fuel systems. Replace the clamp if threads or band integrity are compromised.