For fasteners over 7/8" in diameter. High lubricity allows proper clamp load to be achieved. Heat required to remove.LOCTITE 2047 High Lubricity, Large Bolt, High Strength BlackThreadlocker locks and seals threaded fasteners over 7/8" in diameter. This increased lubricity threadlocker reduces friction and allows proper clamp load to be achieved.The high strength properties ensure clamp load is maintained when exposed to vibration.