Gypsum Screw - (6 x 3-inch)

Cavalry gypsum screws in gauge 6, three inches long - far longer than board fixing normally needs, which tells you what they are for. Three inches reaches through a build-up: two or three layers of board, board over a service void or packing, boarding fixed through an existing finish into the framing behind, and dropped ceilings brought down over old soffits. On a straightforward single-layer job this length is wrong and will find pipes and cables in the void. Bugle head that sets flush and dimples the paper for filling, coarse self-starting thread. Buy them for the specific build-up rather than as a general stock item, and keep them separate from your standard lengths so nobody grabs the wrong box.