Metric hex socket button head screw dimensions are shown in the following chart according to ISO 7380-1:2011 standard.
ISO 7380-1 specifies the properties of hex socket button screws with thread from M3 up to and including M16.
Some important notes from ISO 7380-1 standard:
- Thread: 5g6g for Grade 12.9, 6g for other classes
- Mechanical Properties: For steel socket button screws, property classes are 8.8, 10.9 and 12.9.
For stainless steel socket button screws, property classes are A2-70, A3-70, A4-70 and A5-70, A2-80, A3-80, A4-80 and A5-80.
- Finish: For steel screws, electroplating per ISO 4042 and zinc flake coatings per ISO 10683. For stainless steel screws, plain finish.
- Designation: Hexagon socket button head screw ISO 7380-1 - M12 x 40 - 10.9 (M12 thread with 40 mm length and property class 10.9)