Quick view 5/16"-18 X 1-3/4" Hex Cap Screws, Stainless Steel Hex cap screws are manufactured to tighter tolerances as compared to hex bolts. 18-8 stainless steel is functionally interchangeable with type 304 stainless steel. Stainless steel significantly improves resistance to tarnishing or corrosion. The washer... $115.35 Select Quantity Compare