Full Technical Description: Blank, Screw, Wedge Nut Type; Sheet Steel (Body), Stainless Steel (Screw) Material; UL 514B, CSA C22.2 Approval; 2-1/2 Inch or 3 Inch Trade Size; Form 7 Form Type; Includes Urethane Integral Gasket; Application Non-Hazardous Location; Applicable Standard Federal Specification WC-586D, Nec/Cec