Hose Clamps


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Hose Clamps

Cooling System

For nearly 70 years, NORMA Group pioneered the development of worm drive hose clamps (WDHC) and remains one of the world's foremost innovators and producers for numerous OEM industries and cooling applications. Our portfolio of WDHC's include constant-tension hose clamps that offer a wide range of diameters, screw types, housings and materials to satisfy the needs and requirements of your applications.


TORRO® worm drive hose clamps are specially suitable for applications under high mechanical loads. Since we are continuously working to improve its features this clamp is still setting standards for modern hose clamp design. The distinguishing feature of the TORRO® is the asymmetrical construction which tells you at first sight whether it is a genuine TORRO® or not.
• Multi-range hose clamp
• Material: W1, W2, W3, W4, W5
• Chromium VI free: compliant with ROHS, WEEE and ELV Environmental Directives
• Clamping ranges to DIN 3017: 8–16 mm up to 140–160 mm
• Larger diameters upon request


The notch is a clever option for pre-positioning the TORRO® hose clamp on the hose. In this case the oval hole in the clamp band finds its exact counterpart on the hose surface. Thus the TORRO® is safely and accurately kept in place prior to the final assembly.

• Safe pre-assembly on the hose
• Smart weight saving option without weakening the performance of the clamp


With this accessory the TORRO® can also be pre-positioned on the hose. The two ‘teeth’ of this device keep the TORRO® hose clamp safely in place if it needs to be stocked or transported prior to its final assembly.

• Safe pre-assembly on the hose


For this version of the TORRO® the standard hose clamp is equipped with a spring insert on the inside of the clamp band. When tightening the screw the spring is loaded and stores sufficient clamping force to ensure a long-lasting automatic retensioning effect. Thus the radial clamping force achieved will be sufficient even under extremely low temperatures. Therefore, the TORRO® is an optimal solution for applications under extreme temperature changes.

• Automatic re-tensioning effect in the event of hose relaxation
• Increased sealing reliability across a wide temperature range


The PreFix System is a concept for integrated clamps and clips on hoses and pipes. The demand for complete systems that include the appropriate sealing function is increasing.

• Safe pre-assembly on the hose


The Radial® Insert clamp consists of a standard riveted clamp with a stainless steel liner. This insert in the radial acts as a spring.

• Radial integrated element located on the inside of the clamp band
• High contact pressure due to the radially corrugated design
• There are also dynamic properties
• Only available in 9 mm bandwidth


One more clamp type rounding off this range is the TX. These clamps are specially used in applications in the commercial vehicle sector where extremely high band tensile forces and high fracture torques are required. This is why TX hose clamps are only made with 12 mm band width and in W3 material quality.
• 12 mm band width
• W3 material


ABA Original clamps feature unique, one-piece housing, rolled-up band edges and a non-perforated (embossed) band that protect the hose. For added corrosion resistance the band in the 12 mm Standard is made of Aluzinc which gives three times the protection offered by conventional galvanized steel.
• Solid band
• Rolled up band edges
• Smooth inside
• House protected from pipe


The Breeze CONSTANT-TORQUE® is a breakthrough in clamping technology. A belleville spring mechanism permits the CONSTANT-TORQUE® clamp to automatically increase or decrease its own diameter due to changes in operational or environmental temperatures. This unique design eliminates “cold flow” leaks. Both the Aero-Seal and Heavy Duty construction CT clamps have an extended inner liner which protects all types of hoses from damage and helps maintain consistent sealing pressure.
• The premium hose clamp for truck/heavy equipment/bus and performance industry
• Recommended for use on turbo exhaust sleeves, heater hoses, coolant hoses, intake systems
• Virtually unlimited product life – won’t rust or corrode and is reusable
• Soft hoses – cover gear slots in band to protect all types of hoses from damage
• No special tools needed for installation
• Eliminates the sometimes necessary replacement of expensive “single use” clamps during routine or emergency maintenance
• Prevents massive and costly loss of engine coolant


An integral extension of the band as an inner liner protects soft-surface hose (silicone and others) from damage caused by extrusion or shearing through the band slots. Liner clamps afford maximum protection to soft hoses while providing a true concentric seal.
• Protects soft silicone hose with an integral inner liner
• Alternative to embossed, non-perforated band clamps
• Full range of sizes available for all applications
• Heavy duty four piece Quadra-Lock construction
• Available in 1/2" (12.7 mm), 9/16" (14.2 mm) and 5/8" (15.8 mm) band widths


These BREEZE worm-gear clamps with heavy duty four-piece Quadra-lock construction are designed for use in general-purpose and industrial applications. The BREEZE Quadra-lock clamp is a significant upgrade from common three-piece SAE worm-gear designs, delivering the ultimate in both quality and value.
BREEZE Power-Seal Mini offers a compact streamlined design for fuel, air and transmission hose lines. Breeze Power-Seal Full size Quadra-Lock has a design featuring heavy duty four-piece, industrial aircraft construction. Here, the housing is clinched at four points for extra strength and stability, enabling the clamp to resist twist and housing tilt; a common factor during installation.
• Excellent clamp load
• Smooth housing underside ensures more even distribution of sealing pressure
• Exceeds SAE J 1508 specifications


The original perforated stainless steel worm-gear clamp. Heavy duty four-piece Quadra-Lock construction enables far more tightening torque to be delivered to the band perforations. Used for aircraft and heavy duty industrial applications.
• Original patented worm-gear clamp
• Heavy duty four piece Quadra-Lock construction
• Used for heavy-truck, industrial and aircraft applications
• Features wider 9/16" (14.2 mm) stainless steel band
• Available in a wide variety of materials and screw styles
• NAS 1924 Specification


The BREEZE Super-Seal is the latest breakthrough in clamping technology for EPDM rubber or silicone hose connections in fluid applications. Available with Belleville springs (Heavy Duty HD) or without, this next-generation clamp features a worm-drive closure mechanism with a high dynamic compensation range, as well as a high-pressure, double-bead profile designed to prevent leaks and secure hose connections.
As engine temperature and pressure requirements increase, customers in various industries require a clamp that will resist leaks in harsher environments. The Super-Seal clamp is equipped with two high-pressure sealing lines around the entire perimeter and a recessed hardware attachment that provides a 360-degree seal.
• High-performance compensating clamp allows use of lower cost hose material (EPDM)
• Increased blow-off strength
• Modular design allows for additional compensation when required
• Requires no special tools for installation – quick and easy assembly
• Provides a high degree of security in critical applications


T-Bolt hose clamps are intended for use where other hose clamps do not work. Typical applications include air intake systems, cold side charge air hose connections and a variety of hose, pipe and ducting joints.
• Available in diameters 1.75" (44.5 mm) and larger, T-Bolt hose clamps can be configured to suit almost any application and operating environment
• Also available: different materials and Quick Connect or Quick Release latch styles


FLEX SEAL™ hose clamps incorporate a compression spring to accommodate joint diameter changes resulting from hose set and thermal effects. They are accepted industry wide for use on charge air and coolant system hose connections.
• Heavy Duty T-Bolt and FLEX SEAL™ hose clamps usually have a diameter take up range of 5/16" (7.9 mm)
• Also available: different materials and Quick Connect or Quick Release latch styles


Because of their design, FBS springband hose clamps are particularly suitable for use with hose-spigot connections which are submitted to extreme temperature changes. Once assembled FBS provide a continuously readjusting dynamic tightening effect.
Also at low temperatures the radially acting tightening force is sufficient to assure a reliable tightness of the system. Even hoses when FBS are used.
• Single-part hose clamps without screw
• Uniform distribution of clamping forces
• Optimal roundness
• Temperature resistance from –40°C up to 200°C
• Unmistakable tracing due to batch numbering
• Visual control of nominal diameters by color codes
• Corrosion resistance in salt spray – testing – 720 h on mandrel


is a space-saving clamp. It was designed with the aim of realizing the technical minimum overall height to allow its use in difficult assembly situations.


is a pre-opened version secured by a plastic retaining clip. After slipping the clamp onto the hose, this clamp can be easily removed by hand.


is a pre-opened (and, if desired, pre-positioned) clamp secured by a small metal clip. The retaining clip for this version is removed by using pliers.


is a pre-opened clamp which is pre-positioned on the hose. The retaining mechanism for this version is an integral part of the clamp band.


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