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24 January 2015
Frequently Asked Questions (FAQ) BS EN 14399 High-strength structural bolting assemblies for preloading Do I need Bolt Face Washer or Nut Face Washer (EN 14399-9) with DTI's? Can Preload bolt assemblies (HSFG) be used on painted or galvanised surfaces? What is the minimum thread length on preload bolts? Are two threads protruding through a preload fastener enough? Can Preload (HSFG) assemblies be de-assembled once they have been assembled? Should higher grade nuts be specified for use with galvanized or sherardized set screws and bolts on CE (UKCA) approved assemblies?
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