Hexagon Socket Countersunk Head Screw/Bolts. M8 1.25 16.00-15.57 4.4 5.0 (5.14-5.02) 3.5. Stainless Steel A4 Marine Grade. M10 1.50 20.00-19.48 5.5 6.0 (6.14-6.02).
eBay