Comparison : Item # Z300535, Hex Head Cap Screws, Grade 5, National Coarse, Zinc Plated Steel (1/2"-13)
Item # Z300540, Hex Head Cap Screws, Grade 5, National Coarse, Zinc Plated Steel (1/2"-13)
Item # Z300545, Hex Head Cap Screws, Grade 5, National Coarse, Zinc Plated Steel (1/2"-13)
Item # Z300550, Hex Head Cap Screws, Grade 5, National Coarse, Zinc Plated Steel (1/2"-13)
Item # Z300555, Hex Head Cap Screws, Grade 5, National Coarse, Zinc Plated Steel (1/2"-13)