These co-molded nylon and elastomer parts function as Liquid Tight Plugs with an IP 67/68 rating, yet can be pierced by round wire, cable or tubing to function as Liquid Tight Bushings with the same resulting IP 67/68 rating. Certified by UL under UL 635 For use in panels as thin as .020" (0,5 mm) and as thick as .250" (6,4 mm). Provide liquid tight closure when used as a plug. When pierced, function as a liquid tight bushing that convert raw edged holes to smooth, neat, insulated holes. Used as a liquid tight bushing, HEYCo-molded Liquid Tight Break-Thru Plugs insulate and mechanically protect electrical and telecommunications cable, tubing, hose, rope, and utility lines. Locking fingers snap into holes with fingertip pressure. Locking fingers in fractional increments up to the maximum panel thickness. Available in multiple sizes for use in .500˝ (12,7 mm) to 1.500˝ (38,1 mm) diameter holes.