1. Product Positioning

Black-colored Compression Spring is one of Dingli Spring's standard round wire/square wire compression spring product lines, utilizing domestic 65Mn spring steel, round cross-section wire, and standard length of 300mm. Black (black phosphating), blackening + oiling for rust prevention.

2. Key Selling Points (directly from main and detail images)

  • Domestic 65MN spring steel, 300mm length
  • Complete size range
  • Material guaranteed
  • Customization supported
  • Even one piece at wholesale price
  • High temperature resistance
  • Good toughness
  • Fatigue resistance

3. Applicable Scenarios

General-purpose economical compression spring / bulk replacement / hardware machinery / agricultural machinery / general industrial use compression spring.

4. Specification Quick Reference

For detailed specifications, please refer to the parameter charts on the detail page (total of 11 detail images, including the specification table).

5. Packaging and Delivery

  • Standard parts: bagged + paper box sub-packaging + moisture-proof film
  • In-stock cycle: regular specifications shipped within 24 hours
  • Customization cycle: non-standard 5–10 days
  • Minimum order quantity: no MOQ for standard parts; 200 PCS for custom parts

6. Qualification Endorsement

  • ISO 9001 quality management system certification / 30 years of spring production experience

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