5/16"-18 x 1-1/2" UNC Type F Floorboard Thread Cutting Phillips Dr Flat Head Screw Zinc Plated - R. E. Glover Ltd.
5/16"-18 x 1-1/2" Floorboard Thrd Cut (Phil. Dr) Flat HD F Screw PLTD
5/16"-18 x 1-1/2" UNC Type F Floorboard Thread Cutting Phillips Dr Flat Head Screw Zinc Plated