Woodhead 5527 Cable Strain Relief Grip, Locknut, Max-Loc Cord Seal, Right Angle Male, 1/2" NPT Thread Size, Gray Grommet Color, .312&ndash;.375" Cable Diameter Rugged construction suitable for boxes, cabinets, pushbutton and general use enclosures Nylon body is resistant to impact and corrosion Rubber grommet provides a liquid-tight seal and reduces cord pull-out Grommets are color-coded for easy identification Rubber grommet is best material to resist chemicals and handles a wide temperature range