Our full-line American type constant torque hose clamps are designed to deliver stable, uniform sealing force across diverse tubing applications. With three bandwidth configurations and three material grades available, this series adapts seamlessly from light-duty general plumbing to heavy-duty high-pressure fluid systems, allowing you to match clamp specifications precisely to your working environment, pressure level and project budget.
Unlike ordinary worm drive clamps, the constant torque structure automatically compensates for hose thermal expansion, contraction and gradual gasket settlement, maintaining a tight, consistent seal over long service cycles without periodic re-tightening. The precision-machined worm screw mechanism enables smooth, incremental adjustment during installation, ensuring a secure fit without cutting or damaging the hose outer surface.
We offer three standard bandwidth profiles to match different hose diameters and load requirements:
The standard-duty, cost-effective option for small to medium diameter hoses. Ideal for automotive auxiliary lines, residential plumbing, agricultural irrigation and light industrial fluid transfer, delivering reliable clamping performance in low to medium pressure scenarios.
The medium-duty reinforced option, balancing clamping surface area and installation flexibility. Recommended for medium-pressure industrial pipelines, commercial HVAC systems and general equipment piping, providing upgraded holding force without excess material bulk.
The heavy-duty wide-band option engineered for large diameter hoses and high-torque, high-pressure conditions. The wider steel band distributes clamping force over a larger contact area, reducing hose damage risk and improving sealing reliability for hydraulic lines, heavy equipment and large-scale industrial piping.
Product Specifications
All clamps are manufactured to strict dimensional and performance tolerances, with consistent torque behavior across each size and material grade.
| Range (mm) |
Range (in) |
Bandwidth (mm) |
Material |
| 11-20 | 7/16"-25/32" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 13-23 | 1/2"-29/32" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 14-27 | 9/16"-1 1/16" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 18-32 | 11/16"-1 1/4" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 21-38 | 13/16"-1 1/2" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 21-44 | 13/16"-1 3/4" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 25-45 | 1"1/3/4" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 27-51 | 1 1/16"-2" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 32-54 | 1 1/4"-2 1/8" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 33-57 | 1 5/16"-2 1/4" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 40-64 | 1 9/16"-2 1/2" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 44-67 | 1 3/4"-2 5/8" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 46-70 | 1 13/16"-2 3/4" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 52-76 | 2 1/16"-3" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 57-79 | 2 1/4"-3 1/8" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 59-83 | 2 5/16"-3 1/4" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 65-89 | 2 9/16"-3 1/2" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 70-92 | 2 3/4"-3 5/8" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 71-95 | 2 13/16"-3 3/4" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 78-102 | 3 1/16"-4" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 83-105 | 3 1/4"-4 1/8" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 84-108 | 3 5/16"-4 1/4" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 90-114 | 3 9/16"-4 1/2" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 95-117 | 3 3/4"-4 5/8" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 103-127 | 4 1/16"-5" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 108-130 | 4 1/4"-5 1/8" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 117-140 | 4 5/8"-5 1/2" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 121-143 | 4 3/4"-5 5/8" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 130-152 | 5 1/8"-6" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 133-156 | 5 1/4"-6 1/8" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 141-165 | 5 9/16"-6 1/2" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 146-168 | 5 3/4"-6 5/8" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 157-178 | 6 3/16"-7" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 159-181 | 6 1/4"-7 1/8" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 171-194 | 6 3/4"-7 5/8" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 184-206 | 7 1/4"-8 1/8" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 197-219 | 7 3/4"-8 5/8" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
| 210-232 | 8 1/4"-9 1/8" | 12.7/14.2/15.8 | SS201/SS304/SS316 |
Our standard catalog covers 38+ diameter ranges with both metric and imperial markings for easy global cross-reference. All diameter sizes are compatible with each bandwidth and material option for flexible, mixed ordering.
Material Formulations
To accommodate varying corrosion resistance needs and price points, this clamp series is available in three stainless steel formulations:
An economical grade for dry indoor environments and non-corrosive media. Suitable for general indoor drainage, signage mounting and low-demand applications with minimal moisture or chemical exposure.
The universal industrial grade with balanced corrosion resistance and mechanical strength. It performs reliably in outdoor atmospheric environments, water-based systems and mild chemical exposure, making it the standard choice for automotive, food processing auxiliary lines and most general industrial installations.
The premium corrosion-resistant grade with added molybdenum for enhanced resistance to saltwater, harsh chemicals and high-corrosion environments. It is the preferred option for marine equipment, chemical processing, pharmaceutical production and coastal outdoor applications.
Key Design Advantages
✓
360° Uniform Clamping
The constant torque structure applies even pressure around the full circumference of the hose, eliminating pressure gaps that cause leaks and preventing premature hose wear from localized stress points.
✓
Vibration & Thermal Cycle Resistance
The self-compensating design retains consistent clamping force under continuous equipment vibration and temperature fluctuations, reducing maintenance needs for hard-to-access installations.
✓
Smooth, Precise Installation
The precision-threaded worm screw delivers smooth, jamming-free adjustment for fine-tuned tightening, reducing assembly time and minimizing installation errors.
✓
Flexible Specification Matching
Customers can freely combine bandwidth and material grades per project requirements, with no minimum order limit for standard catalog sizes.
Applications & Industries
This multi-spec constant torque clamp series serves a wide range of industries and installation cases:
Automotive: Air intake systems, coolant hoses, fuel auxiliary lines, exhaust connections
Marine & Offshore: Ship piping systems, coastal fluid lines, desalination piping
Industrial Manufacturing: Chemical transfer, process equipment, industrial drainage
HVAC & Refrigeration: Heating/cooling hoses, chiller piping, ventilation ducts
Food & Beverage: Auxiliary lines, clean water piping (SS316 for sanitary zones)
Agriculture: Sprinkler systems, farm equipment fluid lines, greenhouse piping
Infrastructure: Traffic signage mounting, street pole fixation, outdoor billboards
Customization Services
Beyond our standard size catalog, we provide full customization services for non-standard project requirements:
- Custom clamping diameters to fit unique hose outer dimensions
- Special surface treatments and custom laser marking options
- Custom packaging and private labeling for distribution partners
- Dedicated bulk production with strict quality control for large-scale engineering projects
Our products are widely applied in automotive systems, military equipment, air intake & engine exhaust systems, cooling and heating infrastructure, irrigation networks and industrial drainage systems.
Frequently Asked Questions
What makes a constant torque hose clamp different from a standard worm drive clamp?
Unlike standard clamps, constant torque clamps feature a self-compensating design that automatically adjusts to thermal expansion, contraction, and gasket set. This maintains a consistent sealing force over time without the need for manual re-tightening.
How do I choose the correct bandwidth configuration?
The 12.7mm bandwidth is ideal for standard, light-duty applications. The 14.2mm option provides balanced holding force for medium-pressure industrial systems. The 15.8mm wide-band version is designed for large diameter hoses and heavy-duty, high-torque conditions.
Which stainless steel material grade is right for my application?
SS201 is cost-effective for dry, indoor settings. SS304 is the universal industrial grade with standard corrosion resistance, perfect for outdoor and automotive use. SS316 offers premium protection with added molybdenum, suitable for marine, chemical, and highly corrosive areas.
Will these clamps damage the outer surface of my hoses?
No. The precision-machined worm screw mechanism and smooth band edges allow for incremental adjustment during installation, ensuring a tight seal without cutting or wearing down the outer surface of the hose.
Can you customize sizes and designs for non-standard projects?
Yes, we offer comprehensive customization services, including custom clamping diameters, custom laser markings, special packaging, and bulk manufacturing designed for large-scale engineering requirements.
Mika Clamp
