Grk Fasteners Deck Screw,5/16",Steel,3 1/8"L,PK100 GRK12221

Built in Washer Head W-Cut Thread design cuts through any fibrous material with ease and reduces the amount of torque required to install the screw. Zip-Tip™ is designed for fast starts in any fibrous materials. CEE Thread enlarges the screw hole for the non-threaded portion of the fastener allowing the wood to settle easily.