Length 16mm Excluding Head Hex Socket Flange Head Screw at Jade Warburton blog Allen Screws Hardware Specialty | M4 X 6mm Long Flanged Button Head Socket Cap Screw, Stainless Steel, ISO7380 M4 X 16mm Hex Socket Screw Socket Flanged Button Screws are available from in A2 and A4 Grade Stainless Steel, in natural finish. High Tensile Steel (10.9) variants are also available as standard, in either natural or Zinc Plated finish, depending on the size of screw required 4mm Metric Thread, M4 - 0., 7mm Pitch M4 x 4mm Flanged Socket Button Head Screw A2 Stainless ISO 7380-2 M4 x 16 Flanged Button Head- ISO 7380 With Flange, A2/70 Stainless Steel, Threaded Full Length, Thread Diameter- 4mm, Thread Pitch- 0., 7mm, Length- 16mm, Head Diameter- 9., 4mm, Head Height- 2., 2mm, Allen Key Size- 2., 5mm, Screw Length Does Not Include Head