Sinsun Hardware, established in 2006, is a leading manufacturer and global supplier of high-quality fasteners. Operating from a colossal 30,000 sqm integrated facility, we host advanced production zones, a 12,000 sqm smart warehouse holding an excess of 18,000 pallets, and multi-language customer support networks. Sinsun ships over 8,500 containers annually to global markets including the Middle East, Southeast Asia, South America, and Russia.
Our plant integrates precision Taiwanese technical methods with advanced German machinery, ensuring that every fastening component meets structural requirements. By controlling all phases of production—from the raw material wire drawing down to final surface passivation—we achieve exact mechanical performance for industrial, automotive, and heavy-duty engineering markets.
German-style worm drive clamps, designed in alignment with DIN 3017 standards, are engineered to deliver high radial force and leak-proof sealing under demanding operating conditions. Unlike American-style hose clamps that utilize a perforated band, the German-style clamp is designed with a completely smooth, non-perforated band interior and rolled edges. This structural difference protects soft hoses (such as silicone, polyurethane, and rubber) from shearing, slicing, or tearing under tension.
Crucially, the locking structure features a mechanically crimped worm gear housing that is cold-formed without spot welds. This mechanical lock provides superior torque tolerance and ensures structural integrity when subjected to thermal expansion, cooling cycles, or high vibrational pressure. These characteristics make German-style worm clamps a preferred choice for automotive, industrial fluid transmission, agricultural irrigation, and high-vibration heavy machinery applications.
The non-perforated band prevents soft hoses from pushing through the band holes under pressure, maintaining structural integrity and avoiding leaks over long periods.
The screw housing is interlocked mechanically with the band rather than welded. This design prevents weak points susceptible to stress-corrosion cracking or joint separation.
Calculated thread profiles match the screw perfectly to the band, maximizing radial clamping force with lower input installation torque.
| Material Grade | Band Material | Housing Material | Screw Material | Best For / Application Environment |
|---|---|---|---|---|
| W1 | Aluzinc / Zinc-Plated Carbon Steel | Aluzinc / Zinc-Plated Carbon Steel | Zinc-Plated Carbon Steel | Low-corrosion, dry environments, standard industrial piping and budget-conscious applications. |
| W2 | AISI 201 / 304 Stainless Steel | AISI 201 / 304 Stainless Steel | Zinc-Plated Carbon Steel | Automotive engines, general machinery, and passenger vehicles. Combines strength with moderate corrosion resistance. |
| W4 | AISI 304 Stainless Steel | AISI 304 Stainless Steel | AISI 304 Stainless Steel | Heavy machinery, chemical processing, food industry, and standard marine operations. Highly resistant to rust. |
| W5 | AISI 316 Stainless Steel | AISI 316 Stainless Steel | AISI 316 Stainless Steel | Marine shipbuilding, offshore drilling, petrochemical production, and highly acidic/saline environments. |
We deploy German-engineered multi-station cold heading systems and precision Taiwanese tooling to ensure band and housing tolerances remain within ±0.02mm.
Our four continuous gas-fired heat treatment lines yield target hardness levels of HRC 28-32, enabling consistent torque ratings and resisting thread deformation during installation.
Every production batch is tested for dimensional accuracy, tensile strength (1,000+ MPa), band thickness, and corrosion resistance (up to 1,000 hours in neutral salt spray tests).
Located in the heart of Northern China's metallurgy hub, we source wire rods directly from domestic steelmakers. This reduces transportation costs, limits raw material delivery delays, and insulates procurement from global steel price swings.
Our 30,000 sqm footprint and 12,000 sqm smart warehouse allow us to maintain stock levels on standard DIN 3017 bandwidths (9mm & 12mm). This inventory setup enables rapid dispatch and helps buyers maintain lean supply chains.
We are situated near deep-water ports, facilitating logistics to South America, Europe, the Middle East, and Southeast Asia. We manage port transport, export documentation, and customs compliance for global shipping.
Our W2 and W4 clamps seal coolant, intercooler, and fuel lines under high thermal loads. Their rounded edges protect rubber hoses from cracking under constant vibration and heat.
Used to secure high-pressure air and water pipes in industrial cooling and ventilation systems, resisting moisture-driven corrosion and maintaining tension over time.
Our marine-grade W5 clamps (316 Stainless Steel) are deployed in bilge pumping, fuel lines, and hydraulic networks, resisting salt air and galvanic corrosion.
Every batch of German-style worm clamps is manufactured in conformity with DIN 3017 Part 1 (hose clamps with worm gear drive). We support global engineering programs by offering full documentation, including Material Test Reports (MTR) according to EN 10204 3.1, RoHS compliance statements, REACH reports, and ISO 9001:2015 certification. Our factory is pre-configured to align with IATF 16949 requirements for automotive supplier auditing.
Sinsun was founded with a focus on self-tapping screw production, establishing our core manufacturing processes from the ground up.
Our Export Department was founded, moving our products beyond domestic borders to partners in global markets.
Added four spheroidizing furnaces and wire drawing operations, giving us complete control over raw materials.
Upgraded production with German-engineered multi-station cold heading machines to expand technical capabilities.
Annual production reached 36,000 tons, shipping more than 1,100 containers to customers worldwide.
Created a dedicated ready-stock facility within our 12,000 sqm warehouse to shorten turnaround times for standard orders.
Installed four modern continuous heat treatment lines, enhancing control over product mechanical properties and delivery times.
W1 is fully zinc-plated carbon steel, suitable for indoor, dry applications. W2 features a stainless steel band and housing but has a zinc-plated carbon steel screw. W4 is made entirely of AISI 304 stainless steel, offering excellent corrosion resistance for outdoor or industrial use. W5 is made entirely of AISI 316 stainless steel, providing high protection against sea water and chemical agents.
American-style clamps have holes cut into the band. Under high pressure, the hose material can push up into these slots, risking damage to the hose. German-style clamps have a smooth inner surface and raised edges, allowing the band to sit flat against the hose without cutting into it.
Yes. Sinsun offers custom B2B packaging and branding solutions. We can engrave your logo on the clamp bands, print customized boxes, and provide blister packaging or bulk cartons. We can also manufacture custom widths or thickness dimensions to fit your specifications.
For standard DIN 3017 sizes, we fulfill orders using our ready-stock inventory, enabling shipment within 7-14 days. Custom OEM orders require 30 to 45 days. Minimum Order Quantities depend on the size and material grade. Contact our export department to receive a quote for your project.
