M8 Hexagon Hex Head Screw Bolts A2- 70 / 1.75 in. ( 44mm)  Stainless Steel / Metric.  Hex head width is 13mm ( flat to flat.) Course thread, 1.25 pitch. Listing is for 1 pack of 10 bolts, with 10 nylon insert locking nuts . Threaded length is 44 mm.