Simpson #10 x 1-5/8" Collated Fiber-Cement Board Screw, Coarse Thread, C-3 Galvanized 1500PkModel No. CB3BLG158S Coating Material Mechanically Galvanized, C 3 Screw Size #10 Length (in.) 1 5 8 Head Diameter (in.) 0. 383 Drive Type #3 Square, Undersized Head Type Ribbed Wafer Head Thread Type Coarse Threads Point Type Type 17 Point Compatible Tools. Quik Drive PROLDHG2 Packaging Qty. 1500 The CB3BLG is designed for dense fiber cement to wood applications. This collated screw is used with the Quik Drive PROLDHG2 underlayment backerboard