KORREX® protective caps for socket screws

Prevent corrosion and accumulation of dirt in hex sockets

KORREX® protective caps for socket screws are the ideal protection for common socket screws. Dirt and dust tend to accumulate in the hex socket, which makes unscrewing increasingly difficult. The bolt can also suffer from corrosion. A protective cap is a simple and effective solution for this.

Unique design

These KORREX® protective caps for socket screws are specially designed for DIN 912 socket screws and DIN 7991 countersunk socket screws. Placing protective caps for socket screws over the bolt and hex socket keeps the fasteners clean, functional and looking like new for a considerable time.

Multifunctional, simple, and economical

Pipe ends or drill holes can also be sealed easily and quickly with multifunctional KORREX® protective caps for socket screws. Another advantage of these caps is that they save on maintenance costs: hex bolts sealed with these protective caps for socket screws do not suffer from dust, dirt or moisture. Even after a longer period of time, screws do not come loose.

Advantages of KORREX® protective caps for socket screws

Dubo - KORREX protective caps for socket screws
Part.No.Ref No.Metric


  • Protect hex socket at the top against corrosion and accumulation of dirt.
  • Designed for DIN 912 socket screws and DIN 7991 countersunk socket screws.
  • Can also be used as a seal for other holes
  • Easy to apply
  • Improve the appearance of structures
  • Save on maintenance costs

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.
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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.