20GA Galvanized Perforated Sheet – 1/8″ Holes on 3/16″ Staggered Centers
This 20-gauge galvanized perforated sheet (nominal thickness about 0.0396 in / 1.0 mm) is punched with 1/8 in (3.2 mm) round holes on 3/16 in (4.8 mm) staggered centers, giving approximately 40% open area. The fine, even hole pattern balances airflow and visibility with strength and protection, and the zinc coating resists corrosion.
Perforated metal is used where air, light, sound, liquids or fine particles need to pass through while keeping a physical barrier. It is a common choice for machine guards, speaker grilles, ventilation covers, screens, filters, decorative panels, enclosures and sieving applications.
Key Features
- Gauge: 20 (approx. 0.0396 in / 1.0 mm)
- Holes: 1/8 in (3.2 mm) round
- Pattern: 60-degree staggered, 3/16 in (4.8 mm) centers
- Open area: approximately 40%
- Zinc-coated for corrosion resistance
- Lightweight and easy to cut and form
Specifications
- Material: galvanized (zinc-coated) steel
- Gauge: 20 GA
- Hole diameter: 1/8 in (3.2 mm)
- Hole spacing: 3/16 in (4.8 mm) staggered centers
- Approximate open area: 40%
- Product type: perforated sheet cut to the size selected in the product variation
Typical Applications
- Machine guards and safety screens
- Ventilation covers, vents and air-flow panels
- Speaker grilles and equipment enclosures
- Decorative and architectural panels
- Filter and sieving supports
- Furniture, display and fixture fabrication
Working with Perforated Sheet
Perforated sheet can be sheared, bent and formed, though bend allowances should account for the hole pattern. Cut edges are sharp, so deburr and wear gloves. Galvanized steel is carbon steel protected by a zinc coating. The zinc acts as a barrier against moisture and oxygen and also protects the steel sacrificially at small scratches and cut edges, which is why galvanized material is a long-lasting choice for outdoor, damp and industrial settings. Galvanized steel can be cut, drilled, welded and fastened with standard metalworking tools. Zinc fumes are released when galvanized steel is welded, so work in a well-ventilated area, use appropriate respiratory protection and grind away the coating near the weld zone where possible. After cutting, welding or drilling, touch up exposed steel with a zinc-rich cold galvanizing compound to restore corrosion protection.
Storage and Handling
Handle and store the material off the ground, on dunnage, in a dry and ventilated area. Avoid stacking wet material tightly, as trapped moisture can cause white storage stain (harmless zinc oxide). Dimensions, weights and finish appearance (spangle) may vary slightly between production lots. Please verify critical dimensions and load requirements with your engineer before purchase; this product description is for general guidance and is not a substitute for engineering design.
Frequently Asked Questions
What does 40% open area mean?
About 40% of the sheet surface is holes, which affects airflow, visibility and strength.
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FAQ
A What types of metal materials do you offer?
We provide a comprehensive selection of high-quality metal construction materials including structural steel, aluminum profiles, stainless steel sheets and tubing, carbon steel products, copper and brass materials, iron fittings, and hardware components. Our inventory is regularly updated to meet the demands of construction professionals, manufacturers, and DIY enthusiasts across North America.
A Do you offer bulk discounts for large orders?
Absolutely! We offer competitive bulk pricing for contractors, construction companies, and businesses. The more you order, the better your price per unit. For orders exceeding $5,000, we recommend contacting our sales team directly for a customized quote. We can also arrange special pricing for recurring orders and long-term partnerships.
A What are your shipping options and delivery times?
We offer standard ground shipping throughout the continental United States, with typical delivery times of 5-10 business days. Expedited 2-3 day shipping is available for orders in major metropolitan areas. For heavy or bulk items, we work with specialized freight carriers to ensure safe delivery. Shipping costs vary based on weight, destination, and product type. International shipping to Canada and Mexico can be arranged upon request.
A Can I request a custom cut or specification for materials?
Yes, we offer custom cutting and fabrication services for many of our products. Whether you need specific lengths, widths, or custom shapes, our team can accommodate your requirements. Custom orders typically require 7-14 business days for completion, depending on complexity. Contact our customer service team with your specifications for a detailed quote and timeline.
A Are your materials certified and what quality standards do you meet?
All our metal materials meet or exceed North American standards including ASTM, ASME, and CSA certifications. Our products undergo rigorous quality control testing and come with certified test reports upon request. We maintain compliance with industry regulations and environmental standards. All materials come with documentation verifying composition, strength, and other key specifications to ensure they meet your project requirements.
A What is your return or warranty policy?
We stand behind the quality of our products with a 30-day return guarantee on unused, unopened items in original packaging. All materials are warranted to be free from defects in manufacturing for one year from purchase. If you receive damaged materials or discover defects, notify us immediately. We’ll arrange replacement or refund at no charge. Custom cut or fabricated items are non-returnable unless defective.
A Do you provide technical advice or project consultation?
Our experienced team is happy to provide technical guidance on material selection, specifications, and best practices for your project. Whether you need help choosing the right type of steel, calculating load capacity, or understanding coating options, we’re here to help. Contact us via email, phone, or live chat to discuss your specific needs. For complex projects, we can arrange a consultation call with our technical specialists.
A How can I place an order and what payment methods do you accept?
Ordering is easy through our website using your preferred payment method. We accept all major credit cards (Visa, MasterCard, American Express), bank transfers, and digital payment platforms. For business accounts and bulk orders, we offer net 30 terms upon approval. You can also place orders by phone or email if you prefer personalized service. All transactions are secure and encrypted to protect your information.
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