Comparison : Item # Z430515, Phillips Flat Head Machine Screws, National Coarse, Zinc Plated Steel (5/16"-18)
Item # Z430520, Phillips Flat Head Machine Screws, National Coarse, Zinc Plated Steel (5/16"-18)
Item # Z430525, Phillips Flat Head Machine Screws, National Coarse, Zinc Plated Steel (5/16"-18)
Item # Z430530, Phillips Flat Head Machine Screws, National Coarse, Zinc Plated Steel (5/16"-18)
Item # Z430535, Phillips Flat Head Machine Screws, National Coarse, Zinc Plated Steel (5/16"-18)