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Help CenterNon-Sparking Double Open End Wrench 5.5*7 mm Length 90 mm Aluminum Bronze Anti-Corrosion
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Cangzhou Dean Safety & Special Tools Co., Ltd, a trusted manufacturer since 2001, proudly presents our Non-Sparking Double Open End Wrench in the size 5.5*7 mm with a compact length of 90 mm. Crafted from high-grade Aluminum Bronze, this wrench offers exceptional anti-corrosion properties, making it an ideal choice for environments where moisture, chemicals, or flammable substances are present. As a leading exporter with annual export value exceeding USD 100 million, we ensure every tool meets rigorous safety and quality standards, providing our global clients with reliable performance and long service life.
This double open end wrench features two different-sized openings on opposite ends: 5.5 mm and 7 mm, allowing you to work on two common fastener sizes without switching tools. The overall length of 90 mm offers excellent maneuverability in tight spaces while still providing sufficient torque for light to medium duty fastening tasks. The non-sparking property is derived from the unique composition of aluminum bronze, which reduces the risk of ignition in hazardous environments such as oil refineries, chemical plants, mines, and gas pipelines. Additionally, the alloy's natural resistance to corrosion extends the tool's lifespan even in humid or marine conditions.
Key Features & Technical Specifications
- Material: Aluminum Bronze (Al-Cu-Fe alloy) – provides non-sparking and anti-corrosion characteristics.
- Dimensions: Opening sizes 5.5 mm and 7 mm; overall length 90 mm.
- Weight: Lightweight design for reduced user fatigue during prolonged use.
- Surface Finish: Smooth, polished finish without burrs for comfortable grip and easy cleaning.
- Standards: Manufactured in compliance with common industry specifications for non-sparking tools (e.g., ASTM or similar – available upon request).
- Application: Suitable for environments classified as Zone 1, Zone 2 (gas), and Zone 21, Zone 22 (dust) according to ATEX/IECEx guidelines.
- Testing: Each tool undergoes hardness and spark resistance tests during production to ensure consistency.
Technical Parameters (Table)
| Parameter | Value |
|---|---|
| Opening 1 | 5.5 mm |
| Opening 2 | 7 mm |
| Overall Length | 90 mm |
| Material Hardness | HRB 80–95 (typical) |
| Anti-Corrosion Grade | Excellent (suitable for marine environments) |
| Non-Sparking Property | Pass friction/spark test per ASTM F2624 or equivalent |
Advantages for Your Operations: By choosing this non-sparking wrench, you significantly reduce workplace fire and explosion risks. The anti-corrosion finish ensures the tool remains functional even after exposure to chemicals, salt spray, or extreme humidity. The compact length (90 mm) and dual-size openings improve productivity as you can handle two fastener sizes without changing tools. Moreover, the ergonomic design minimizes hand strain, and the aluminum bronze alloy is non-magnetic, making it safe for use near sensitive electronic equipment.
Trust and Credibility
Cangzhou Dean Safety & Special Tools Co., Ltd has been a dedicated manufacturer of safety tools for over two decades. With an annual export value exceeding USD 100 million, our products are shipped to major ports including Tianjin, Shanghai, and Ningbo, reaching clients across North America, South America, Europe, the Middle East, Africa, Oceania, and Southeast Asia. Our manufacturing facility in Cangzhou, Hebei, employs advanced production techniques and strict quality control procedures. Many of our customers are industry leaders in oil & gas, petrochemical, mining, and marine sectors who rely on our non-sparking tools for daily operations. We offer customizable packaging and can provide third-party testing reports upon request. Your safety is our priority—contact us today for a quote or to request additional technical documentation.
Frequently Asked Questions
Q1: Can this wrench be used in underwater or wet environments?
A: Yes, the aluminum bronze material provides excellent corrosion resistance, making it suitable for wet and marine environments. However, after use in saltwater, rinse with fresh water and dry to prolong tool life.
Q2: Does the 5.5*7 mm size refer to metric or imperial measurements?
A: Both openings are in millimeters (metric). The 5.5 mm opening fits M3.5 or M4 fasteners typically, and 7 mm fits M4 or M5 fasteners. Please confirm your bolt sizes before purchase.
Q3: How does non-sparking performance compare to steel tools?
A: Non-sparking tools like this aluminum bronze wrench produce significantly fewer sparks when struck against hard surfaces, reducing ignition risk in flammable environments. They are not 100% spark-free, but they meet international safety standards for ATEX and NEC hazardous locations.
Q4: What is the maximum torque I can apply with this 90 mm wrench?
A: For light to medium duty applications, typical maximum torque is around 15–20 Nm. For higher torque requirements, we recommend using a longer wrench or a torque tool. Avoid using pipe extensions that could exceed the tool's capacity.
Q5: Is this wrench certified by any international body?
A: Our non-sparking tools are manufactured according to common industry standards. We can provide a certificate of compliance or test reports upon request. Certifications from third-party labs (e.g., SGS, TÜV) are available as an optional service.
Q6: Can I order this wrench with custom markings or branding?
A: Yes, we offer customization including laser engraving of company logos, part numbers, or safety warnings. Minimum order quantities may apply; please inquire with our sales team.
Q7: How should I clean and maintain this wrench?
A: Clean with mild soap and water, then dry thoroughly. Avoid abrasive cleaners. Store in a dry environment. The natural patina that develops on aluminum bronze is normal and does not affect performance.
Q8: What is the typical lead time for this product?
A: For standard quantities (100–500 pieces), lead time is 15–25 working days. Larger orders or custom specifications may require 30–45 days. We can prioritize urgent orders based on stock availability.
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