AT-5 Large White Nylon Tie Mount – Qty. 500 The AT-5 tie mount is designed to be set into wet resin during the hull lay up or bonded with our acrylic adhesives. It’s designed for a #5 wire tie and has an average pull strength of 150 lbs. It’s approved for submerged bilge applications. Stop putting plywood in your hull just to have a place to drive wire tie screws. Saves material and labor costs!