Customized 4-Ring D-Shape Metal Binder Mechanism for A4 Files - 292mm Length, 65mm Ring Diameter
Customized 4-ring D-shape binder mechanism designed for A4 file folders, featuring a 3-inch (65mm) ring diameter for large-capacity document organization.
| Parameter | Available Options |
|---|---|
| Material | Cold Rolled Steel (Environmental) |
| Standards | DIN, IFI, ASTM, ISO, JIS, BS and non-standard |
| Overall Length | 90-315mm (multiple sizes available) |
| Base Width | 15-45mm |
| Ring Inside Diameter | 15-76mm |
| Ring Number | 2-30 rings |
| Ring Shape | O, D, Q shapes available |
| Surface Treatment | Zn-plating, Ni-plating, Cr-plating, Tin-plating, copper-plating, resin spraying, heat treatment, hot-dip galvanizing, black oxide coating, painting, baking paint, color zinc-plated, blue black zincplated, rust preventive oil, titanium alloy galvanized, silver plating, plastic, electroplating, anodizing |
Multiple sizes available with inner diameters ranging from 2.5 inches to 3 inches. Custom colors available upon request.
| Item No | Overall Length (mm) | Base Width (mm) | Overall Height (mm) | Inside Height (mm) | Ring Center Distance | Rivet Hole Center Distance |
|---|---|---|---|---|---|---|
| PR292-4-25/26 | 292 | 26 | 31 | 25 | 80*80*80 | 282 |
| PR292-4-30/26 | 292 | 26 | 36 | 30 | 80*80*80 | 282 |
| PR292-4-38/26 | 292 | 26 | 44 | 38 | 80*80*80 | 282 |
| PR2924-50/26 | 292 | 26 | 54 | 50 | 80*80*80 | 282 |
| PD292-4-25/26 | 292 | 26 | 36 | 25 | 80*80*80 | 282 |
| PD292-4-30/26 | 292 | 26 | 42 | 30 | 80*80*80 | 282 |
| PD292-4-38/26 | 292 | 26 | 51 | 38 | 80*80*80 | 282 |
| PD292-4-50/26 | 292 | 26 | 60 | 50 | 80*80*80 | 282 |
| PD292-4-65/36 | 292 | 36 | 81 | 65 | 80*80*80 | 282 |
Note: Not all available items are listed on this page. Contact us directly for custom specifications and additional size options.
We are a professional hardware stationery binder clip manufacturer with 15 years of production experience. Our team of over 100 members operates across two factory areas totaling 15,000 square meters.
Metal binders are widely used in notebooks, data books, file boxes, and other document organization systems as essential metal accessories.
- OEM / ODM services available
- Free samples provided
- Lead time: 10-15 working days (depending on order quantity)
- Secure packaging with moisture protection
- Multiple payment options including Alipay, PayPal, Western Union, and Credit Card
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.