Based on this product's specifications, here are some alternatives and similar models
Lapp Skindicht BL PG16 Brass Blanking Plug with Sealing Ring IP68
Summary description:
The Lapp Skindicht BL PG16 is a high-quality brass blanking plug designed to seal unused threaded holes in enclosures and housings. Featuring an IP68 protection rating, it ensures reliable resistance against dust and water ingress. Equipped with a durable sealing ring, this component provides a secure and tight fit for industrial electrical installations, maintaining the integrity of your equipment in demanding environments.