Comparison : Item # Z430025, Phillips Flat Head Machine Screws, National Coarse, Zinc Plated Steel (4-40)
Item # Z430030, Phillips Flat Head Machine Screws, National Coarse, Zinc Plated Steel (4-40)
Item # Z430035, Phillips Flat Head Machine Screws, National Coarse, Zinc Plated Steel (4-40)
Item # Z430040, Phillips Flat Head Machine Screws, National Coarse, Zinc Plated Steel (4-40)
Item # Z430045, Phillips Flat Head Machine Screws, National Coarse, Zinc Plated Steel (4-40)