These Machine Screws Feature A Phillips Flathead And Sizes Ranging From 8-32 To 5/16"-18. They Are Made From Grade 316 Stainless Steel For Maximum Corrosion Resistance And Durability. These Screws Are Available In Small Packs And Bulk 1 Lb. Packs. Matching Washers, Nuts And Stainless Phillips Head Driver Bits Are Available.