What material are cable glands made of? How should they be stored? What standards are there and what should be observed? Answers to these and many other technical questions about cable glands can be found here.
Certificates are the be-all and end-all for electromechanical components. Whether explosion protection, IP protection classes or export approvals - no components may be used, assembled or exported without the necessary approvals.
Here you can download important documents. These include operating instructions for EMC, hygienic and Ex cable glands as well as an interesting guide to product selection.