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The OK505 stackable plastic conference chair is a versatile, commercial-grade seating solution engineered to meet the rigorous demands of high-usage public and private spaces. Developed as a universal seating option for educational institutions, corporate conference centers, religious venues, event rental companies and government facilities, this chair balances exceptional durability, user comfort, space efficiency and customizable functionality to adapt to diverse application scenarios.
At the core of the OK505’s design is its integrated injection-molded polypropylene (PP) seat-and-back shell, a one-piece construction that delivers superior impact resistance, long-term structural stability and effortless daily maintenance. The smooth, non-porous PP surface is easy to wipe clean and sanitize, making it ideal for high-traffic environments where hygiene and quick turnaround between events are critical. The ergonomic contour of the seat and backrest provides optimal support for extended periods of sitting, reducing user fatigue during long training sessions, conferences or events.
Complementing the durable PP shell is a robust four-leg frame, available in two high-quality material options: heavy-gauge steel or genuine stainless steel. The steel frame can be finished with electrostatic powder coating in black or gray, or polished chrome plating for a sleek, modern aesthetic, while the stainless steel option offers exceptional corrosion resistance for outdoor use or humid indoor environments such as aquatic centers or coastal venues. The frame is available in two steel tube specifications – Ø22×1.1mm standard tube or Ø19×1.0mm optional tube – allowing customers to select the perfect balance of weight, strength and cost for their specific project needs.
Specification | Details | English Notes |
|---|---|---|
Overall Width | 49 cm | Overall chair width |
Overall Depth | 51 cm | Overall chair depth |
Overall Height | 80 cm | Overall chair height |
Seat Height | 44 cm | Height from floor to seat |
Seat Depth | 38 cm | Seat depth |
Backrest Height | 39 cm | Effective backrest height |
Net Weight | 2.7 kg | Net weight per chair |
Recommended Maximum Stack | 15 pcs | Recommended maximum vertical stack quantity |
Standard Steel Tube | Ø22 × 1.1 mm | 22 mm diameter, 1.1 mm wall thickness |
Optional Steel Tube | Ø19 × 1.0 mm | 19 mm diameter, 1.0 mm wall thickness |
Static Load Test | 600 lbs / ≈272 kg | SGS certified static load test |
Seat & Back Material | Integrated injection-molded polypropylene (PP) | One-piece PP shell for durability and easy cleaning |
Frame Material | Steel or genuine stainless steel | Multiple frame options for indoor and outdoor use |
Surface Finish | Electrostatic powder coating, chrome plating | Stainless steel option available for humid/outdoor environments |
Armrests | No, armless design | Space-saving armless structure for high-density seating |
One of the OK505’s most valuable features is its space-saving stackable design, which supports vertical stacking of up to 15 chairs. This capability drastically reduces the storage footprint required when the chairs are not in use, and simplifies rapid setup, breakdown and transportation for event rental companies, multi-purpose venues and training facilities that frequently reconfigure their seating layouts. For venues requiring fixed, orderly row seating, the OK505 offers two optional interlocking connection systems: a welded frame-mounted built-in connector, or a detachable external row connector. Both options allow chairs to be securely linked together in straight or curved rows, preventing movement and ensuring a uniform, professional appearance in auditoriums, churches, conference halls and performance venues.
To further enhance its versatility for educational and training environments, the OK505 is compatible with a range of optional accessories. These include a clip-on writing tablet, perfect for note-taking during training sessions, seminars or exams, as well as fixed, hanging or removable book baskets for storing textbooks, notebooks and personal items. These accessories transform the basic conference chair into a fully functional training chair, making it an ideal all-in-one solution for schools, universities, corporate training centers and tutoring facilities.
The OK505 is not only designed for performance and functionality, but also for compliance with global safety and quality standards. It has passed rigorous SGS static load testing of up to 600 lbs (approximately 272 kg), demonstrating its exceptional structural integrity and ability to withstand heavy, continuous use. Additional compliance certifications are available upon request, including CE, ISO 9001, EN 16139, EN 12520, REACH SVHC, California Proposition 65, and BS 5852 fire retardant testing, ensuring the product meets the regulatory requirements of markets worldwide.
Available in a wide range of frame colors and customizable PP shell finishes, the OK505 can be tailored to match the aesthetic of any venue, from modern corporate conference rooms to traditional church sanctuaries, educational campuses and outdoor event spaces. Custom logo printing is also available on the back or underside of the PP shell, allowing brands, venues and educational institutions to personalize the chairs with their own branding and messaging.
Whether you are furnishing a 1000-seat auditorium, a 50-person training room, a church sanctuary, a corporate conference center or an event rental fleet, the OK505 stackable plastic conference chair offers a reliable, cost-effective and versatile seating solution that combines commercial-grade durability, user comfort, space efficiency and customizable functionality to meet the unique needs of your project.
The one-piece injection-molded polypropylene seat-and-back shell is the foundation of the OK505’s performance. This unified construction eliminates weak points and seams that can fail over time, delivering superior impact resistance and long-term structural stability, even in high-frequency commercial environments. The smooth, non-porous PP surface is inherently resistant to stains, spills and scratches, and can be quickly wiped clean with a damp cloth or sanitizer, making it perfect for high-traffic venues where quick cleanup and hygiene are essential. Unlike fabric-upholstered chairs, the PP shell does not absorb liquids or odors, ensuring the chairs remain fresh and presentable even after years of heavy use.
The OK505 has undergone rigorous SGS static load testing, withstanding a maximum load of 600 lbs (approximately 272 kg) without structural failure. This exceptional load capacity is a testament to the chair’s robust engineering, from the reinforced PP shell to the heavy-gauge steel frame. Unlike many competing plastic conference chairs that are only tested for loads of 200-300 lbs, the OK505’s 600 lbs rating ensures it can safely accommodate users of all sizes, and withstand the rigors of continuous use in commercial settings without bending, cracking or collapsing. This makes it an ideal choice for venues that prioritize safety, durability and long-term reliability.
One of the OK505’s most significant advantages over traditional fixed seating is its space-saving vertical stackable design, which supports stacking of up to 15 chairs. This capability drastically reduces the storage space required when the chairs are not in use, allowing venues to maximize their usable floor space for other activities. For event rental companies, training facilities and multi-purpose venues that frequently set up and break down seating, the stackable design simplifies transportation, handling and storage, reducing labor time and costs associated with chair setup and teardown. The chairs are designed to stack securely without wobbling or tipping, ensuring safe storage and easy movement, even when fully stacked.
For venues that require fixed, uniform row seating, the OK505 offers two versatile interlocking connection systems, allowing customers to choose the perfect solution for their specific needs. The first option is a welded frame-mounted built-in connector, which is permanently attached to the chair frame for a seamless, integrated look and maximum stability. The second option is a detachable external row connector, which can be easily added or removed as needed, offering maximum flexibility for venues that alternate between row seating and free-standing chair layouts. Both interlocking systems securely link chairs together in straight or curved rows, preventing individual chairs from shifting or moving during use, and ensuring a neat, professional appearance in auditoriums, churches, conference halls, performance venues and lecture rooms.
The OK505 is designed to be a truly versatile seating solution, with a range of optional accessories that allow it to be customized for a wide variety of applications. For educational and training environments, the chair can be equipped with a clip-on writing tablet, which provides a stable surface for note-taking, exam-taking or using a laptop during training sessions, seminars or lectures. Additionally, fixed, hanging or removable book baskets can be added to the chair, providing convenient storage for textbooks, notebooks, personal items and water bottles, eliminating the need for separate desks or tables in training rooms and classrooms. These accessories transform the basic conference chair into a fully functional training chair, making it an ideal all-in-one solution for schools, universities, corporate training centers and tutoring facilities.
The OK505 offers unparalleled flexibility in frame selection, with multiple material and finish options to suit any environment and aesthetic preference. The standard frame is constructed from heavy-gauge steel, which can be finished with durable electrostatic powder coating in black or gray for a classic, understated look, or polished chrome plating for a sleek, modern aesthetic that complements contemporary venue designs. For outdoor use or humid indoor environments such as aquatic centers, coastal venues or poolside areas, a genuine stainless steel frame option is available, which offers exceptional corrosion resistance and long-term durability in harsh conditions. This wide range of frame options ensures the OK505 can be tailored to perfectly match the needs and style of any project, from indoor corporate conference rooms to outdoor concert venues and beachside event spaces.
The OK505 is fully customizable to meet the unique aesthetic and branding needs of our customers. In addition to the standard frame finishes, we offer a wide range of custom PP shell colors and finishes, allowing the chairs to be matched to the color scheme of any venue, brand or event. Custom logo printing is also available on the back or underside of the PP shell, using high-quality, durable printing techniques that ensure the logo remains sharp and vibrant even after years of use and cleaning. This customization capability makes the OK505 the perfect choice for educational institutions, corporate brands, event venues and rental companies that want to create a cohesive, branded look across their seating fleet, and reinforce their brand identity with every guest, student or attendee.
The OK505 is engineered and manufactured to meet the most stringent global safety, quality and environmental standards, making it suitable for sale and use in markets worldwide. The chair has passed SGS 600 lbs static load testing, and additional compliance certifications are available upon request, including CE marking for the European Union, ISO 9001 quality management certification, EN 16139 and EN 12520 European furniture safety standards, REACH SVHC compliance for chemical safety, California Proposition 65 compliance for the US market, and BS 5852 fire retardant testing for the UK market. This comprehensive compliance portfolio ensures that the OK505 meets all regulatory requirements for commercial furniture in major global markets, providing our customers with peace of mind and simplifying the import and sales process for international projects.
Standard Bulk Packaging: Assembled chairs stacked on pallets for full container loads, ideal for large project orders and event rental fleets.
Carton Packaging: Knock-down (disassembled) chairs packed 4 units per 60×60×60 cm carton, perfect for small orders, retail distribution and e-commerce fulfillment.
Custom Packaging: Custom packaging solutions available upon request to meet specific shipping, branding or storage requirements.
Standard MOQ: 300 chairs per color for bulk orders
20GP Container Order: Minimum 800 chairs for full 20GP container loads
Mixed Color Orders: Multiple colors can be mixed in a single container, subject to confirmation of quantity per color and total order volume
Sample Orders: Small sample orders available for quality testing and venue layout evaluation, contact us for sample pricing and availability
Container Type | Loading Quantity | Packaging Method |
|---|---|---|
40HQ Container | 1,440 chairs | Palletized packaging |
40HQ Container | 2,200 chairs | Assembled chairs stacked upright in bulk |
40HQ Container | 2,650 chairs | Assembled chairs stacked horizontally in bulk |
20GP Container | 800+ chairs | Standard bulk palletized packaging |
Standard Production Lead Time: 3-4 weeks after receipt of deposit payment and final confirmation of all order details, including color, finish, accessories and custom requirements
Rush Orders: Expedited production available for urgent projects, contact us to confirm rush lead time and pricing
Sample Lead Time: 7-10 working days for standard sample orders
We offer flexible shipping options to meet the needs of our worldwide customers, including:
EXW Factory: Ex-works shipping from our manufacturing facility, ideal for customers with their own freight forwarders
FOB Port: Free on board shipping from the nearest Chinese port, including all local port handling and documentation fees
CIF Destination Port: Cost, insurance and freight included shipping to the customer’s destination port
DDP Delivery: Delivered duty paid shipping directly to the customer’s warehouse or project site, including all customs clearance, duties and taxes
We work with reputable global freight forwarders to ensure timely, safe and cost-effective delivery of your order, and provide full tracking information for all shipments.
We offer comprehensive OEM and ODM services to meet the unique needs of our customers, including:
Custom product design and development based on your specific requirements
Custom color matching for PP shells and frame finishes
Custom logo printing and branding on the chair shell
Custom accessory development and integration
Custom packaging and labeling solutions
Our experienced engineering and design team will work closely with you from concept to production to ensure your custom project is completed to your exact specifications, on time and on budget.
What material is the OK505 chair made of?
It uses an integrated injection-molded polypropylene PP seat-and-back shell combined with a steel or genuine stainless steel four-leg frame.
Is the OK505 a stackable conference chair?
Yes. The recommended maximum stack is approximately 15 chairs.
Can the chairs be connected into rows?
Yes. Welded frame-mounted interlocking devices or detachable external row connectors are available.
Is the chair suitable for schools and training rooms?
Yes. It can be equipped with a writing tablet and book basket for classrooms and training spaces.
Can a writing tablet be added?
Yes. An optional writing tablet is available for education, training and conference applications.
Can a book basket be added?
Yes. Fixed, hanging and removable book basket options are available.
What steel tube sizes are available?
The frame is available with Ø22 × 1.1 mm or Ø19 × 1.0 mm steel tubes.
What frame finishes are available?
Black or gray powder coating, silver chrome-plated steel and genuine stainless steel are available.
What is the difference between chrome-plated and stainless steel frames?
Chrome-plated steel is recommended mainly for indoor use, while genuine stainless steel provides better corrosion resistance for outdoor or humid environments.
What is the load capacity?
The chair has been tested by SGS for a static load of up to 600 lbs, approximately 272 kg.
Is a fire-retardant plastic shell available?
Yes. A fire-retardant PP shell configuration tested according to applicable BS 5852 requirements is available.
What certifications are available?
Applicable documentation can include CE, ISO 9001, EN 16139, EN 12520, REACH SVHC, California Proposition 65, BS 5852 and SGS load testing.
What are the chair dimensions?
The overall dimensions are approximately 49 W × 51 D × 80 H cm, with a seat height of 44 cm.
What is the net weight?
The net weight is approximately 2.7 kg per chair.
What is the MOQ?
The standard MOQ is 300 chairs per color. A normal 20GP order starts from approximately 800 chairs.
Can different colors be mixed in one container?
Yes. Mixed colors are available, subject to confirmation of quantity per color and total order quantity.
What is the production lead time?
Normal production lead time is approximately 3-4 weeks after payment and final confirmation of all order details.
How many chairs fit in a 40HQ container?
Approximately 1,440 chairs with pallet packaging, 2,200 assembled chairs stacked upright in bulk or 2,650 assembled chairs stacked horizontally in bulk.
Is carton packaging available?
Yes. Four knock-down chairs can be packed in one 60 × 60 × 60 cm carton.
Can a customer logo be printed?
Yes. A custom logo can be printed on the back or underside of the PP shell.
Is the chair suitable for church and auditorium use?
Yes. The interlocking row connection feature keeps seats aligned and orderly, making it ideal for church, auditorium, concert and performance venue seating.
