can you switch screws from factory and still get fire rating

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The Von Duprin 33A/35A rim narrow style exit device is only for non rated openings and fire rating is not available with this device. The Falcon F24-R is a narrow style fire rated exit device T...
Yes.  A fire rating was approved in 2016.Please see the 33A/35A catalog here for more information:http://us.allegion.com/content/dam/allegion-us-2/web-documents-2/Catalog/Von_Duprin_33A.35A_Se...