They are Stainless Cap screw bolts and SS washer I got from McMaster. I have seen some other members here do it to clean up the engine bay a bit.
OEM VC bolts are M6 with a shoulder that has a 10 mm diameter to fit snugly inside the VC grommets. I did not find any that had the right dimensions as the stock ones however. The ones you see in those pictures are plain M6 bolts.