Hex Flange Nut

Hex Flange Nut Description

A flange nut is a nut that has a wide flange at one end that acts as an integrated washer. This serves to distribute the pressure of the nut over the part being secured, reducing the chance of damage to the part and making it less likely to loosen as a result of an uneven fastening surface.

flange nut is a nut that has a wide flange at one end that acts as an integrated washer. This serves to distribute the pressure of the nut over the part being secured, reducing the chance of damage to the part and making it less likely to loosen as a result of an uneven fastening surface. These nuts are mostly hexagonal in shape and are made up of hardened steel and often coated with zinc.

The flange may be serrated to provide a locking action. On a serrated flange nut, the serrations are angled such that they keep the nut from rotating in the direction that would loosen the nut. Because of the serrations they cannot be used with a washer or on surfaces that must not be scratched. The serrations help in preventing the vibration of the nut from moving the fastener, thus maintaining the holding power of nut.

Flange nuts are sometimes provided with a swivel flange which helps in creating a more stable structure without affecting finished product like a serrated flange nut. Swivel flange nuts are mostly used in joining wood and plastic.

A self-aligning nut, also known as a spherical nut or leveling nut, is a type of nut that is used in applications where the fastener is not perpendicular to the surface the nut anchors to. It achieves this action by using a flange nut inside a specially shaped dished-out washer. They are commonly used in the aerospace industry. If this nut were not used the object would have to be spot faced perpendicular to the fastener.

Hex Flange Nuts are hex nuts with a wide flanged portion near one end that acts as an integrated non-spinning washer. Flange nuts are used to spread the load placed on the nut over a wider surface area to prevent the installation material from damage. The flange acts as a washer which allows the nut to fasten evenly to the surface of the installation material.

Hex flange nuts are very common and used widely in softer installation materials. These nuts come with either a serrated or non-serrated flange. The non-serrated flange gives some of the benefits of a standard flat washer. The serrated version of a flange nut comes with serrations on the bottom of the flange to create a locking effect. The serrations bite into the material it is installed into. This makes the nut less likely to loosen over time due to vibrations. Hex flange nuts also save time and money by removing the need for a washer to be added to each fastener assembly during installation.

The following specifications define flange nuts: DIN 6923 (superseded by DIN EN 1661) DIN EN 1661 ISO 4161