Comparison : Item # Z41C0180, Round Head Combo Machine Screws, National Coarse, Zinc Plated Steel (1/4"-20)
Item # Z41C0185, Round Head Combo Machine Screws, National Coarse, Zinc Plated Steel (1/4"-20)
Item # Z41C0190, Round Head Combo Machine Screws, National Coarse, Zinc Plated Steel (1/4"-20)
Item # Z41C0195, Round Head Combo Machine Screws, National Coarse, Zinc Plated Steel (1/4"-20)
Item # Z41C0200, Round Head Combo Machine Screws, National Coarse, Zinc Plated Steel (1/4"-20)