Most sizes available in both Plain finish and Black Oxide; Black Phosphate is the finish of the item at the bottom in the image above.
The 1-1/2" length and most of the 12" length bolts have smooth heads. Soon, the new 2" length will also have smooth heads. The rest of them have some form of head markings.
Please select the desired length and quantity from the table below.
Head size is 3/4". Yes, we have Rub Washers and 8-point sockets for these, too.