5/16-18 x 1/2 Unslotted Indent Hex Washer Thread Cutting Screw Type F Full Thread Black Oxide NWP22 These screws have a flat

These screws have a flat head with a Phillips drive

The square recess drive provides a secure fit for your drill bit

The M3 x 16W7 JIS B1188 Phil Pan Split Washer Flat Washer Sems M/S Zinc Yellow is a type of washer that is used to distribute the load of a screw or bolt

The screw has a serrated hex head that provides a good grip for driving

5/16-18 x 1/2 Unslotted Indent Hex Washer Thread Cutting Screw Type F Full Thread Black Oxide NWP22 These screws have a flat5 16 18 x 1 2 Unslotted Indent Hex Washer Thread Cutting Screw Type F Full Thread Black Oxide: Size: 5 16" diameter, 18 threads per inch, 1 2" length Type F: Full thread Head: Hex washer head with un slotted indent Material: Steel Finish: Black oxide Thread cutting: Designed to cut threads into the material as it is installed, providing a secure hold in thin or soft materials Indent hex washer head: Provides a large bearing surface and high torque