Detailed Explanation of Installation Direction
1. Flange face inward: During installation, the wide flange face of the flange nut should be tightly against the surface of the connected parts. If the flange face has serrations (anti-loosening teeth), it must be in contact with the connected parts to prevent loosening through mechanical engagement.
2. Threaded end outward: The threaded portion of the nut should face outward for easy tightening with wrenches, sockets, and other tools, and for later maintenance.
3. Marking face outward: For double-sided nuts with performance grades or manufacturer markings, it is recommended to have the marking face outward for easy inspection and identification later.
Why must it be installed this way?
1. To achieve anti-loosening function: The toothed flange face needs to be embedded in the surface of the connected parts to form a mechanical engagement, preventing the nut from loosening due to vibration. If it faces outward, the anti-loosening function will fail.
2. To distribute pressure and prevent crushing: The flange face increases the contact area, effectively distributing the pressure during tightening and preventing damage to soft materials (such as aluminum alloys and plastics).
3. Ensure Sealing Performance: In pipelines, pressure vessels, and other applications, the flange face facing inwards works in conjunction with the gasket to ensure a reliable seal at the connection and prevent leakage.
4. Facilitate Tool Operation: The threaded end must face outwards for proper tightening with a wrench or power tool. Reverse installation will result in inoperability or insufficient torque.
Consequences of Incorrect Installation:
1. Flange face outwards → Anti-loosening failure, loose connection, crushing of connected parts
2. Threaded end inwards → Inability to tighten, insufficient thread engagement, high risk of disengagement
3. Damage to the sealing surface → Leading to media leakage and posing safety hazards.
