Five Star Wire Door Spring Middle (300 Pieces)
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Five Star BA661 Wire Door Spring Middle – 1/2" (300 Pieces per Carton)
Five Star BA661 Wire Door Spring Middle is a professional wire spring mechanism in 1/2" (half inch) size, providing automatic closure for light mechanical doors. Its simple and economic structure is widely preferred in office, residential, and commercial areas. This product is sold in carton units containing 300 wire door springs, ideal for bulk purchase, project-based supply, and stock renewal. The same series also includes small (BA660) and large (BA662) sizes; the correct size should be selected according to the door weight.
Technical Specifications
| Brand/Model | Five Star BA661 |
|---|---|
| Product Type | Wire Door Spring (Medium Size) |
| Size | 1/2" (Half Inch) |
| Carton Content | 300 Pieces |
| Sale Unit | 1 Carton (Bulk) |
| Material | Wire spring (carbon alloy) |
| Compatible Door Weight | Light doors (up to 15–20 kg) |
| Installation Location | Door hinge side or case side surface |
| Surface Treatment | Standard coating (corrosion protected) |
Size Selection Guide: Which Model is Suitable?
| Model | Size | Compatible Door Weight | Application |
|---|---|---|---|
| BA660 Small | 3/8" | Very light (max 10 kg) | Cabinets, pantries, light partition doors |
| BA661 Medium | 1/2" | Light (up to 15–20 kg) | Standard interior doors |
| BA662 Large | 5/8" | Medium (up to 25–30 kg) | Heavy wooden doors, exterior entrances |
What is a Wire Door Spring? Why Should It Be Chosen?
- Economic Solution: Much more cost-effective than hydraulic door closers; provides environmentally friendly automatic closure.
- Simple Installation: Simply fixed with screws; no special tools or professional installation required.
- Automatic Closure: The door closes automatically with the spring force; it closes forgotten open doors.
- Energy Saving: Reduces air conditioning/heating loss by preventing the door from staying open.
- Bulk Purchase Cost Advantage: The 300-piece carton reduces unit cost in large projects; facilitates stock management.
Application Areas
- Residential Interior: Bedroom, bathroom, pantry, and basement doors
- Office & Workplace: Light partition doors, archive and storage entrances
- School & Public Buildings: Toilets, dressing rooms, and service doors
- Hotel & Accommodation: Service rooms, laundry and rear area doors
- Commercial Areas: Store back rooms, cafe kitchen entrances
Frequently Asked Questions
Which doors are suitable for BA661 medium size?
BA661 is designed for standard interior wooden/MDF doors with a maximum weight of 15–20 kg. For heavier doors, the large size (BA662) should be chosen. Select the correct size by weighing the door weight.
What is the material of "wire"? Does it rust?
The product is made of carbon alloy wire spring. It is protected against corrosion with standard coating. Periodic inspection is recommended for long life in humid environments. For heavy humidity or outdoor use, consider stainless steel options.
How is the 300-piece carton packaged?
300 wire door springs are sent in a carton suitable for bulk shipment. Each spring is not individually packaged; bulk packaging is done. It is practical for storage and distribution.
Is the screw included for installation?
No. Wire door springs are generally not sold with screws. You need to purchase the appropriate screws separately for installation. The screw size and type vary according to the door/case material.
Can I order the small (BA660) or large (BA662) sizes as well?
Yes. The same series also includes the BA660 (3/8") and BA662 (5/8") models as separate products. Select the correct size according to your door weight. For mixed size orders in bulk purchases, please contact us.
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