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For solid wooden floorboards as well as wall and ceiling profiles with tongue and groove, so no further clips or clamps required Spax cut point precision placement, allows screwing in without pre-drilling (wood-dependent), effectively reduces splitting of the torque Small 60° milling head: clean, the flush sinking of the screw head SPAX typical ground serrations at start of the screw for quick and secure fastening Partial thread for firm tightening of the upper wood layer SPAX T-STAR plus: secure bit grip, no cam-out effect, optimal force transmission
Flooring screws can help to prevent squeaky boards and eliminate the need for glues and nails. Floor screws also remove the need for any pre-drilling allowing you to complete the job quickly without fuss.
You'll want the screw to go about an inch past the plywood into the joist or underlying layer beneath it. So if your subfloor is 3/4 of an inch thick, any screw about 1 3/4 inches long will do the trick. If the plywood subfloor you're placing is 5/8 of an inch thick, you need a screw about 1 5/8 inches long.