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Dangerous threaded rods
The invention of the Chinese to make threaded rods cheaper. According the norm DIN976-1 the top angle should be 60 degrees. What happend when you reduce the thread angle? The core diameter become smaller, outer diameter remains the same. A huge reduction of weight of steel! In europe this was a big problem just after the economic crisis. Still you see a lot of inferior thread angles in Europe, Africa, USA, Middle East and Far East. The more price sensitive the market, the bigger risks are take into quality.
But have you ever thought about the consequences this makes to the standard DIN976-1? The change of the topangle is a very dangerous decision. We have received various collapsed constructions over the years, mainly due to the inferior thread angle. Simply the nut is ripped of the core of the rod. So weak!
Watch this video to learn more about the difference this makes in the strenght of the threaded rod!
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