The Professional Choice for Premium Outerwear & Leather!
The YKK No. 5 Silver Metal Open-Ended Zip (RAO56) is the gold standard for garments requiring maximum strength and a high-end finish. Featuring polished aluminium teeth on a durable polyester tape, this zipper combines a rugged, industrial feel with a sleek, modern aesthetic.
Designed specifically for heavy-weight fabrics, the RAO56 is the preferred fastener for leather jackets, heavy wool coats, and designer outerwear. Unlike plastic alternatives, these metal teeth provide superior structural integrity, ensuring your garment remains secure and functional for years to come.
Key Features & Benefits
- High-Strength Metal Teeth: The Number 5 gauge aluminium teeth are built to withstand high tension, making them perfect for heavy-duty applications.
- Open-Ended / Separating Design: Engineered for garments that need to open completely, such as jackets, cardigans, and coats.
- Premium Silver Finish: The bright silver/aluminium finish adds a high-quality, professional look to any fashion or repair project.
- Auto-Lock Slider: Comes equipped with an automatic locking mechanism, preventing the zipper from sliding down unintentionally during movement.
- Built to Last: YKK metal zippers are famous for their “break-in” period—the more they are used, the smoother the action becomes.
Ideal Applications
- Leathercraft: Biker jackets, leather vests, and heavy-duty bags.
- Heavy Outerwear: Parkas, pea coats, and denim jackets.
- Workwear: Utility jackets and heavy-duty overalls.
- Fashion Repairs: Replacing broken zippers in premium high-street or designer coats.
Specifications
- Brand: YKK®
- Model: RAO56 (Silver/Aluminium)
- Type: Open-Ended / Separating
- Teeth Material: Aluminium
- Tape Material: Durable Polyester
- Slider: Auto-Lock
- Lengths Available: 31cm (12″) up to 76cm (30″)
Outerwear Size Guide
Match the length of your jacket or coat accurately with our conversion chart:
| CM | 31 | 36 | 41 | 46 | 51 | 56 | 61 | 66 | 71 | 76 |
| Inches | 12″ | 14″ | 16″ | 18″ | 20″ | 22″ | 24″ | 26″ | 28″ | 30″ |
Also referred to as MAOR-56 (MAOR56) and RAOR-56 (RAOR56) silver zippers.




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