M12 M16 M20 High Tensile 10.9 Countersunk Flat Head Allen Bolts Socket Cap Screw RM 4.69 to RM 913.35
Imperial 1/8 5/32 3/16 1/4~3/8 Flat Head Allen Hex Socket Screw Bolt, 10.9 Steel RM 8.01 to RM 137.22