M8 x 40 mm Cap Head Screw Allen Key Bolt Socket Screw Black Steel Grade 12.9
M8x40mm Cap Head Allen Key Screw Socket Screw. Allen Key Size (S) 6 mm. Socket Depth (SD) 4 mm. Pitch(P) 1.25 mm. Thread Length [Min] (TL) 28 mm. Head Thickness (T) 8 mm. Length(L) 40 mm. Steel Grade 12.9.