Comparison : Item # Z721220, Flat Head Socket Cap Screws, National Coarse (1"-8)
Item # Z721225, Flat Head Socket Cap Screws, National Coarse (1"-8)
Item # Z721230, Flat Head Socket Cap Screws, National Coarse (1"-8)
Item # Z721235, Flat Head Socket Cap Screws, National Coarse (1"-8)
Item # Z721240, Flat Head Socket Cap Screws, National Coarse (1"-8)