304 Stainless & Galvanized Heavy Duty Worm Drive Handle Hose Clamp 8-170mm
Germany Type Hose Clamp with Butterfly Handle Overview
This handle-type hose clamp is a rugged industrial fastener designed for connecting flexible and rigid hoses in demanding environments. Featuring an open-type inner and outer ring bolting structure, it uses external hex-head bolts that are tightened through a steel band perforation process, delivering strong, even locking force.
Constructed from either 304 stainless steel or zinc-plated/galvanized steel, these clamps offer excellent corrosion resistance and long-term durability. They are available in metric dimensions with two bandwidth options (9mm and 12mm) and cover a broad clamping range from 8mm to 170mm, making them suitable for a wide variety of pipe and hose diameters.
Whether you're securing fuel lines on a tractor, oil pipes on a ship, or water hoses in a fire protection system, this clamp provides a dependable, leak-proof seal that stands up to vibration, pressure, and harsh weather.
German-Style Worm Gear Hose Clamp Benefits
Dual Material Choice – Choose 304 stainless for maximum rust resistance in wet or chemical environments, or galvanized steel for cost-effective performance in general industrial use.
Open-Type Bolt Fastening – The external hex-head design allows for easy tightening with standard wrenches, and the perforated band ensures the locking force is uniformly distributed around the hose.
Metric Precision – All dimensions are in metric units, simplifying selection and installation for most global engineering standards.
Versatile Size Range – Available in two bandwidths (9mm and 12mm) and covering diameters from 8–12mm up to 150–170mm, you can find the right fit for almost any hose or pipe.
Corrosion-Protected Finish – Both the stainless and galvanized options undergo surface treatment to resist oxidation and extend service life, even in outdoor or high-humidity settings.
Thumb Screw Hose Clamp Material Selection
| Material | Features | Suitable Environments |
| 201 Partially Stainless Steel | Economical, with average rust resistance | Dry environments, short-term use |
| 201 Fully Stainless Steel | High strength, with better rust resistance than semi-stainless steel | General industrial applications, mild outdoor conditions |
| 304 Fully Stainless Steel | Resistant to acids and alkalis, with high-temperature resistance (-50°C to 200°C) | Food, medical, chemical, and marine environments |
| Galvanized Iron | Low cost, with average rust resistance | Short-term rust protection, dry environments |
Worm Drive Hose Clamp with Butterfly Handle Specifications
All clamps have a thickness of 0.6 mm. The table below lists the complete size availability for both bandwidth options:
| Size (mm) | Bandwidth | Size (mm) | Bandwidth | Thickness (mm) |
| 8-12 | 9mm | 10-16 | 12mm | 0.6 |
| 10-16 | 9mm | 12-20 | 12mm | 0.6 |
| 12-20 | 9mm | 16-25 | 12mm | 0.6 |
| 16-27 | 9mm | 20-32 | 12mm | 0.6 |
| 20-32 | 9mm | 25-40 | 12mm | 0.6 |
| 25-40 | 9mm | 32-50 | 12mm | 0.6 |
| 32-50 | 9mm | 40-60 | 12mm | 0.6 |
| 40-60 | 9mm | 50-70 | 12mm | 0.6 |
| 50-70 | 9mm | 60-80 | 12mm | 0.6 |
| 60-80 | 9mm | 70-90 | 12mm | 0.6 |
| 70-90 | 9mm | 80-100 | 12mm | 0.6 |
| 80-100 | 9mm | 90-110 | 12mm | 0.6 |
| 90-110 | 9mm | 100-120 | 12mm | 0.6 |
| 100-120 | 9mm | 110-130 | 12mm | 0.6 |
| 110-130 | 9mm | 120-140 | 12mm | 0.6 |
| 120-140 | 9mm | 130-150 | 12mm | 0.6 |
| 130-150 | 9mm | 140-160 | 12mm | 0.6 |
| 140-160 | 9mm | 150-170 | 12mm | 0.6 |
(Note: The 9mm band is available in more sizes, while the 12mm band covers the larger diameters, providing extra strength for heavy-duty applications.)
Thumb Screw Hose Clamp Showcase
German type hose clamp with handle Applications
Automotive & Agriculture – Fuel lines, oil return hoses, coolant pipes on tractors, combines, and trucks.
Marine – Engine cooling systems, bilge pump hoses, and deck wash connections on ships and boats.
Fire Protection – Securing fire hoses to hydrants and sprinkler system piping.
Construction – Temporary or permanent connections for air, water, and slurry lines on job sites.
General Industry – Pneumatic tubes, dust extraction ducts, and chemical transfer hoses.
Installation Tips
Slide the clamp over the hose end before attaching it to the fitting.
Position the band over the hose overlap area (typically 5–10mm from the end).
Tighten the bolt by hand until the hose is snug against the fitting. Avoid overtightening to prevent damage to the hose.
For high-vibration applications, re-tighten after the first hour of operation.
Worm Drive Hose Clamp with Butterfly Handle Package
About Us
Mika (Tianjin) Pipeline Technology Co., Ltd. is a professional manufacturer of high-performance pipe clamps, located in Tianjin, a key port city and strategic hub on the Maritime Silk Road. We serve industries ranging from automotive and military to HVAC and irrigation, providing reliable, leak-proof sealing solutions. Our team of nearly 100 includes a dedicated technical staff of 8 (with 5 senior engineers) and a responsive sales and after-sales team of 15. We combine rigorous quality control with a collaborative, forward-thinking work ethic to deliver products that perform under pressure.
FAQ
A: 304 stainless offers superior corrosion resistance, making it ideal for marine, chemical, or outdoor use. Galvanized steel is more affordable and still provides good rust protection for indoor or light-duty applications.
A: Measure the outer diameter of your hose (or pipe) when it's installed. Then pick a clamp whose range covers that measurement. For example, a 20mm hose would use the 20–32mm clamp.
A: Yes, they are reusable. However, inspect the band and threads for wear before reinstallation, especially if they've been under high torque.
A: Yes, but we recommend using the 12mm bandwidth for softer materials, as it distributes pressure more evenly and reduces the risk of cutting or pinching.
A: Yes. We provide various packaging options (poly bags, boxes, blister packs) and can apply stencil or laser marking upon request.
