Everbilt 1/4 in.-20 tpi x 5/8 in. Brass Expansion Nut

When light sealing and vibration dampening is required, the Brass Expansion Nut from Everbilt is the perfect fit. Comprised of 2 parts, the plug is placed into a pre-drilled hole and a bolt is inserted. When the bolt is tightened, the end of the rubber backs up toward the flange, expands and anchors itself within the hole.