Description
Overview:
The Ball Spring for DeWalt DCF787, DCF887, and DCF888 Impact Drivers (N437890) is a small but critical OEM component that maintains positive bit retention and smooth operation in the driver's quick-release/retention mechanism. As a genuine DeWalt/Black & Decker part, it is manufactured to the correct dimensions and spring rate for reliable performance under repeated load. The spring works with the detent ball in the hex chuck to hold bits securely and release them cleanly when required, helping to restore performance if the original spring has weakened or failed. Built from tough spring steel for long service life, it is a direct replacement that fits precisely into the existing assembly on compatible impact drivers, including the DCF887 and DCF888, and supports consistent, safe, and efficient use on site or in the workshop.
Key Features:
- Genuine DeWalt/Black & Decker OEM part for assured compatibility and fit
- Correct spring tension helps maintain firm bit retention and smooth release
- Precision-made to match the original specification on DCF787, DCF887, DCF888
- Durable spring steel construction for repeated impact and high-cycle use
- Helps restore chuck/bit holder function and reduce unplanned downtime
- Direct replacement with no modifications required
- Supports consistent performance in heavy-duty tasks
- Compact component for cost-effective maintenance
Typical Applications:
Used in the bit retention mechanism of compatible DeWalt impact drivers for everyday fixing and assembly work. Suitable for construction, carpentry, joinery, electrical and plumbing installs, automotive fastening, plant maintenance, and workshop use where secure hex bit holding and reliable release are essential.
Also known as:
Bit holder spring, detent spring, ball detent spring, chuck retention spring, quick-release spring, impact driver retention spring.
Fits Models:
DCF787, DCF887, DCF888
Alternate Part Numbers:
N437890
Product Specifications
| L&S Part No. | N437890 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | DeWalt/Black and Decker |
| OEM No. | 437890 |
| Unit of Sale | Each |
| Applications | DCF787, DCF887, DCF888 |
| Machine Type | Impact Driver |
| Fits Brands | Black & Decker, DeWalt |
