Sinsun Hardware, established in 2006, is a premier manufacturer and global exporter of industrial-grade fasteners. Spanning a massive 30,000 sqm state-of-the-art facility, we leverage German multi-station cold heading systems and precision Taiwanese processing lines. As Northern China's dominant production hub for high-strength fastening elements, our output reaches over 8,500 shipping containers per annum, servicing structural developers, automotive brands, and heavy industry plants across the Middle East, Southeast Asia, South America, and Europe.
By controlling every stage from Xingtai Steel raw material acquisition, spherodizing wire drawing, to advanced proprietary heat treatments, Sinsun ensures dimensional accuracy of ±0.02mm, tensile strengths exceeding 1,000 MPa, and anti-corrosion properties exceeding 1,000+ hours in salt spray testing.
Get a Quick QuoteDouble ear clamps, also known as 2-ear clamps or pinch clamps, are highly robust fluid sealing fasteners designed to offer permanent protection against leaks. Unlike traditional worm-drive screws, which apply asymmetrical radial pressure and can loosen under high vibration, the dual-ear configuration is engineered for absolute dynamic performance. When crimped, the two ears deform plastically to absorb mechanical stress and maintain uniform, constant tension around the entire circumference of the hose or tubing.
This dynamic tension properties make double ear clamps optimal for systems undergoing high thermal fluctuation, as the mechanical "spring action" of the deformed metal offsets the expansion and contraction of rubber or silicone tubing. Ideal for OEM applications in gas delivery, air lines, beverage dispensing, and automotive cooling, these clamps provide high tamper resistance and an airtight seal without damaging delicate hose materials.
| Feature Spec | Double Ear Clamps | Single Ear Clamps | Worm Gear Clamps |
|---|---|---|---|
| Sealing Force Style | Dual-point uniform contraction | Single-point pinch action | Asymmetric radial tension |
| Thermal Deflection | Excellent (absorbs expansion) | Moderate | Poor (susceptible to backing out) |
| Tamper Resistance | High (permanent deformation) | High (permanent deformation) | Low (easily opened with driver) |
| Typical Applications | Air lines, fluids, OEM assemblies | Lightweight hose connections | Automotive aftermarket, DIY |
Automobile fuel lines, vacuum lines, and HVAC circuits require durable connections. Our double ear clamps resist extreme thermal cycles without losing clamping force, ensuring zero leakage in demanding engine compartments.
Compressed air distribution systems are subject to constant vibration and sudden pressure surges. The two-ear configuration maintains a 360-degree leak-proof seal even under high fluid velocity and dynamic pulsations.
Food, chemical processing, and beverage lines demand clean, corrosion-resistant components. Our SS316 and SS304 ear clamps prevent crevice corrosion while providing clean, food-safe connections.
Sinsun was founded with a state-of-the-art self-tapping screw manufacturing center in Northern China, defining our quality standards early on.
Established the Sinsun Export Department, expanding heavy-industry fastening products to the Middle East, Russia, and Southeast Asia.
Commissioned four spheroidizing furnaces and in-house drawing lines, enabling total grain-structure control of incoming raw wire steel.
Integrated multi-station cold heading systems from Germany alongside precision production lines from Taiwan to expand sizing capabilities.
Annual production volume surged to 36,000 metric tons, satisfying large contracts via 1,100+ export ocean containers.
Transitioned logistics into a high-capacity smart facility storing 18,000+ pallets for rapid fulfillment of bulk industrial contracts.
Activated 4 high-capacity continuous atmosphere furnace heat treatment lines, securing high-hardness specifications on-site.
Sinsun Hardware controls the structural resilience of every double ear clamp by processing premium carbon and stainless steels sourced directly from Xingtai Steel. Spheroidizing annealing guarantees a consistent pearlitic structure, eliminating inner stress concentrations during the multi-stage cold heading and stamping procedures.
For high-corrosion configurations, our SS304 and SS316 stainless steels receive passivated, high-clean finishes. This treatment achieves surface roughness averages (Ra) ≤ 0.4μm, preventing micro-crevice fluid retention and microbial build-ups. Salt spray performance tests achieve standard benchmarks over 1,000+ hours in marine salinity simulations.
Additionally, our structural steel options go through carburizing gas-fired lines to secure a ductile core combined with a wear-resistant surface shell (HRC 28-32), ensuring no ear fractures occur during high-torque mechanical crimping.
As a leading Chinese supplier of industrial hardware, Sinsun hosts foreign trade delegations monthly. Procurement representatives audit our smart warehouse, tracking our Kanban distribution lines and real-time inventory management. This structure ensures accurate packing and safe shipping for large international orders.
Participating in key industrial trade expos globally allows us to connect directly with regional engineering consultants. Our direct communication channels help fast-track custom engineering projects, translating custom drawings into 3D prototypes and pilot runs in under two weeks.
