Simpson Strong-Tie 1-1/4" x 36" PAB Pre-Assembled Anchor Bolt - Hot Dip Galvanized Deck Screws this screw features underhead nibs

this screw features underhead nibs and a Type 17 fast-start point that drive easily and countersink smoothly into wood deck boards

The anchor also includes an integrated coupler head engineered to accept standard threaded rod

QDPRO300SG2

the FPHSD features a self-drilling point that eliminates predrilling and a coarse-threaded shank for strong engagement into wood

Although these are labeled as drywall screws

Simpson Strong-Tie 1-1/4" x 36" PAB Pre-Assembled Anchor Bolt - Hot Dip Galvanized Deck Screws this screw features underhead nibsSimpson Strong Tie PAB Pre Assembled Anchor Bolts provide a convenient, code recognized solution for securing wood sill plates and structural members to concrete foundations. Each pre assembled anchor bolt includes the nut and washer already installed, helping simplify installation while reducing the chance of misplaced hardware on the jobsite. Designed for installation in wet concrete, these headed anchor bolts feature a forged anchor head that