These custom class 10.9 socket head bolts were manufactured for our gun accessory manufacturing customer with commercial black oxide finish.  The rolled #6-48 thread length was set to 3.5MM +/-0.3MM and the head height to 2.28MM +/-0.2MM.  Head diameter measured at 5.05MM +/-0.12MM with a cold formed 2.38-2.41MM hex socket drive.  Full certs were available with the parts.