BIG TIMBER® 316 Stainless T-30 Lag Screw, 25-Count Bucket, SCTX154-25, #15 x 4 IN

The SCTX screw is 316 marine grade stainless steel for superior interior/exterior corrosion resistance. The star drive handles 2X the torque as Phillips or Square Drive while extending the life of the bit. It has a built-in washer head for increased pull through strength. It has an aggressive knurl that enlarges the hole to reduce splitting and drag to help draw lumber together. The type 17 tip helps give it faster precise starts which eliminates "walking" and allows for easy insertion without pre-drilling. This product is backed by certified independent testing (TER 1911-02).