Comparison : Item # Z450040, Phillips Pan Head Machine Screws, National Coarse, Zinc Plated Steel (3-48)
Item # Z450045, Phillips Pan Head Machine Screws, National Coarse, Zinc Plated Steel (3-48)
Item # Z450050, Phillips Pan Head Machine Screws, National Coarse, Zinc Plated Steel (3-48)
Item # Z450055, Phillips Pan Head Machine Screws, National Coarse, Zinc Plated Steel (3-48)