DURAL Durabase Backer Board Screw and Washer Pack (80-Piece) for Shower Underlayment

The Durabase screw and washer pack is for use with the Durabase XPS Waterproof Backer Board. They are used to quickly fasten the Durabase XPS backer board to the supporting studs. Each pack contains 40 screws and 40 washers.Made for use with the Durabase XPS Backer BoardMade from galvanized steelSpacing for installation at 16 in. horizontally and 12 in. verticallyWasher should be recessed in the board slightly and covered with urethane or Durabase WP Seam Tape for a watertight installationMade in China