Standard specifications for hexagon head, ISO7380 hexagon head screws

ISO7380 disc head hexagon screw belongs to a kind of hexagon screw, also known as half round head hexagon screw and mushroom head hexagon screw.

Pan head hex socket screw than other types of socket head screw head pressure face a bigger, more for the aluminum plate type framework fastening, need before use in aluminum joints tapping screw thread and process holes.
Production process: cold heading molding

Pan head hex socket screws drawings and standard

 

hexagon head screws drawing

Nominal diameter           Pitch dk k s t Length
d P max min max min max min min B
M3 0.5 5.7 5.4 1.65 1.4 2.045 2.02 1.04 6-40
M4 0.7 7.6 7.24 2.2 1.95 2.56 2.52 1.3 6-40
M5 0.8 9.5 9.14 2.75 2.5 3.071 3.02 1.56 8-60
M6 1 10.5 10.07 3.3 3 4.084 4.02 2.08 10-60
M8 1.25 14 13.57 4.4 4.1 5.084 5.02 2.6 12-100
M10 1.5 17.5 17.07 5.5 5.2 6.095 6.02 3.12 16-100
M12 1.75 21 20.48 6.6 6.24 8.115 8.025 4.16 20-100
M16 2 28 27.48 8.8 8.44 10.115 10.025 5.2 30-100

Material of hexagon head screws

 

                        Material The element name and chemical composition (%)
Carbon (C) Manganese (Mn) silicon(Si) Phosphorus (P) Sulfur (S) Nickel (Ni) Molybdenum (Mo) Chromium (Cr)
SUS304 ≤0.08 ≤2.00 ≤1.00 ≤0.045 ≤0.03 8.00-11.00 – 17.00-19.00
SUS316 ≤0.08 ≤2.00 ≤1.00 ≤0.045 ≤0.03 10.00-14.00 2.00-3.00 16.00-18.00

Performance of  Hexagon head screws

 

category performance rate diameter of thread strength of extension yield strength Mpa elongation proof stress
A2 50 ≤39 500 210 0.6d 500
A2 A4 70 ≤24 700 450 0.4d 700
A4 80 ≤24 800 600 0.3d 800

Torsion standard for hexagon screws with pan head

 

                          Thread                      Performance rate Performance rate
A2-50 A2(A4)-80 A4-80
Damage to the torsion
M1.6                                                                                                                     A2-50                       A2-70                     A4-70                       A4-80 0.15 0.2 0.24
M2 0.3 0.4 0.48
M2.5 0.6 0.9 0.96
M3 1.1 1.6 1.8
M4 2.7 3.8 4.3
M5 5.5 7.8 8.8
M6 9.3 13 15
M8 23 32 37
M10 46 65 74
M12 80 110 130
M16 210 290 330
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