This is the standard historical version focused on electroplated coatings.
The standard specifies the maximum coating thickness allowed before the thread exceeds its tolerance limit.
The mechanical properties of the fasteners shall meet the requirements of the relevant strength class, as specified in DIN 267 Part 2.
The passivation or chromating finish (e.g., bright, yellow, olive, or black). Status of the Standard: DIN 267 Part 9 vs. ISO 4042 din 267 part 9 pdf
: Older versions of these processes often used Hexavalent Chromium (the yellow/gold tint). Today, most industries avoid this due to toxicity, opting for "Clear" or "Blue" passivations. 🛡️ The Plating "Secret Code"
: Providing a bright, uniform metallic finish (such as zinc, nickel, or chromium). Key Technical Specifications in DIN 267 Part 9
Applies primarily to threaded fasteners (M1.6 to M36) and other mechanical parts receiving electrolytic metallic layers. Layer Thickness: This is the standard historical version focused on
: For purchasing the current international counterpart, ISO 4042.
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, you can often find technical summaries or older archived versions on platforms like Din 926 | PDF - Scribd The passivation or chromating finish (e
These tolerance limitations were prioritized for electroplated coatings—coatings could not exceed the dimensional tolerance limits of bolts and screws.
In practice, these requirements meant that for high-strength fasteners (property classes such as 10.9 and 12.9) and hardened parts exceeding 390 HV, the risk of hydrogen embrittlement could not be entirely ruled out. Consequently, such parts were electroplated only on express customer order and at the customer's responsibility.
What is the of your fastener (e.g., 8.8, 10.9)? What is the thread size and pitch you are working with?
Salt spray testing according to ISO 9227 to verify the duration of resistance to white rust (corrosion of the coating) and red rust (corrosion of the base steel).