KORREX® hexagon nut caps

For hexagonal nuts

KORREX® nut caps for hexagonal nuts are an effective yet simple solution. Although very easy to attach, they offer significant protection. These nut caps can be used in any location and industry.

Insulate the bolt connection

KORREX® nut caps with KORREX® insulation bushes and Dubo® retaining washers completely insulate the bolt connection.

Sealing and protection

Pressing the nut cap onto the nut turns a hexagonal nut into a cap nut. The original connection of the nut remains intact, while the thread is sealed and the nut and bolt are protected against corrosion and other negative effects. This both improves the security of the construction and gives a more attractive finish.

Advantages of KORREX® Hexagon nut caps

Dubo - KORREX hexagon nuts
Part.No.Ref No.MetricWidth accross flatsHhTtDS1S2packing


  • Seal the thread
  • Insulate nut and bolt
  • Can be used without modifying existing construction or connection

Protect nut and bolt against corrosion

  • Easy to apply
  • Reuse possible

Can be used in combination with:

Dubo - Retaining Washers

Dubo® retaining washers

Dubo® retaining washers are effective and easy to use. Dubo® retaining washers have a unique design which forces the nylon to encase the screw thread and the bolt hole when the connection is tightened. It offers an effective and cost-effective solution for manufacturers and installers who need permanent, durable locking.

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More info?

If you have any questions about the original Dubo® or KORREX® products, check out the FAQs on our site or contact us. We’ll be happy to hear from you!

Disclaimer: All descriptions, technical information, drawings and dimensions on this website have been compiled by Dubo Dorned B.V. with the greatest care. Nevertheless, Dubo Dorned B.V. cannot accept any liability for type-setting and typographical errors, technical changes to the products or for any incidental or consequential damage in connection with our technical statements or our ability to deliver. All drawings and descriptions on this website are in no way of an agreed quality. The information herein concerns typical values intended for reference and comparison purposes only. It should NOT be used as a basis for design specifications or quality control. Contact us for full material property datasheets from manufacturers. Understandably, the application of the products listed assumes expertise on their use and assembly as well as standards. All our offers and any subsequent orders and agreements resulting thereof are exclusively subject to the General Terms and Conditions of Dubo Dorned BV.