Attributes . Explosionproof, dust-ignitionproof; Smooth, rounded integral bushing in each hub protects conductor insulation; Accurately tapped, tapered threads for tight, rigid joints and ground continuity; Allows up to 25 PCT conduit fill in compliance with the National Electrical Code; Can be used as a male thread enlarger or conduit hub in an ordinary location; UL listed for use with Kwiko A sealing compound, also listed with certain competitors sealing cement, contact factory for details; Kwiko A cement required: 1 OZ/GM; Used to seal vertical conduit risers at switch gear and motor control centers, sheet metal structures or cast boxes and enclosures . Names