Techniques for verifying coating quality and thickness.
A bolt is only as good as its surface. Without the specifications in DIN 267-9, a simple zinc coating could make a bolt too thick to fit its nut or leave it vulnerable to "white rust" in weeks.
Specifying how plating thickness affects the dimensional limits of metric threads.
Note: Many supply chains, particularly in the automotive and heavy machinery industries, still reference legacy DIN 267-9 blueprints. Accessing the historical PDF is often required for retrofitting, repairing, or manufacturing spare parts for older machinery. 7. How to Interpret Legacy DIN 267-9 Codes din 267 part 9 pdf
DIN 267-9 defined the requirements for fasteners that undergo . Its primary focus included:
Modern document versions often align these designations with international standards like ISO 4042. Current Status: DIN 267 Part 9 vs. ISO 4042
Fasteners must be baked in an oven shortly after plating (usually within 4 hours). Techniques for verifying coating quality and thickness
The standard had a long history, with early versions published as early as 1966. However, the most recognized version remains the release, which superseded the 1968 edition. The 1979 edition was 20 pages long and served as a crucial reference for manufacturers and engineers for over a decade. Its primary focus was to standardize electroplated coatings on threaded fasteners, ensuring consistent quality, durability, and performance across different industries, particularly in automotive, machinery, and construction.
Applying a layer of metal onto a threaded fastener increases its physical dimensions. If the coating is too thick, the bolt may not fit into the corresponding nut or tapped hole.
The official publisher of German national standards. ISO Store: For purchasing the updated ISO 4042 equivalent. ensuring consistent quality
Reduces the risk of stress corrosion cracking due to properly implemented hydrogen embrittlement relief. Where to Find DIN 267 Part 9 PDF
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