The Hillman Group 220139 3/8-16X2-1/2 Cap Screw Product Description Coarse thread. Grade 8. Heat-treated yellow dichromate. Less nuts. From the Manufacturer Hex cap screws can be used when looking for outdoor applications or a stronger bolt. The name hex cap screw and hex bolt are commonly interchanged. A hex cap screw is actually manufactured with tighter tolerances and can be used anywhere a hex bolt is used. Features Coarse Thread, Grade 8, Heat-Treated Yellow Dichromate, Less Nuts An Alternative For Using Them Without Nuts Is To Install Them Directly Into A Compatible Internally Threaded Hole Grade 8 Screw From The Brand: The Hillman Group USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.