The slots are designed for a cotter pin to pass through the nut and a pre-drilled hole in a shaft or bolt, preventing the nut from rotating or loosening.

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. DIN 935 / ISO 7035 / PN 82148 crown nuts - eurobolt

The strength profiles and material requirements outlined in the standard dictates how these castle nuts perform under varying load limits:

If you’ve been searching for “,” you’ve likely encountered some confusion—and for good reason. The term “ISO 7035” actually refers to two completely unrelated things: a technical report series for ductile iron water pipelines on one hand, and a mechanical fastener standard on the other. This article provides a clear, comprehensive guide to help you understand exactly what ISO 7035 is, where to find its PDF, and why knowing the difference matters.

These machines use thousands of threaded connections. Standardizing to ISO 7035 reduces leakage points.

If the bolt hole does not align perfectly with a slot in the castle nut upon reaching target torque, slightly tighten the nut further until the nearest slot clears the hole. Never back off or loosen the nut to achieve alignment, as this compromises preload tension.

– Many engineering firms subscribe to ISO via IHS, Techstreet, or Perinorm. Search your internal document portal first.

This is critical for engineers selecting materials for chemical plants or industrial cooling systems.