We carefully embed our precisely inserted stainless steel thread in impact-resistant and highly resilient POM quality plastic. The Heser backplate nuts hold the wing and backplate firmly to the tanks, are easy to grip and can be mounted easily - even in winter with thick gloves! Due to the small overhang, our Heser Backplate Screws effectively protect the threaded rod from damage and the flat design also prevents pressure points in the back. The backplate is also protected from damage. The contact corrosion that occurs in salt water in connection with aluminium backplates and stainless steel screws is reliably prevented. Heser backplate screws not only provide a perfect hold - they also look really good!