Button Head Socket (ISO 7380)

Nominal Screw Diameter and Thread Pitch A H S J T Head Diameter Head Height Head Side Height Hexagon Socket Size Key Engagement Min. Max. Min. Max. Ref. Nom. Min. M3 x 0.5 5.40 5.70 1.43 1.65 0.38 2.0 1.04 M4 x 0.7 7.24 7.60 1.95 2.20 0.38 2.5 1.30 M5 x 0.8 9.14 9.50 2.50 2.75 0.50 3.0 1.56 M6 x 1 10.07 10.50 3.00 3.30 0.80 4.0 2.08 M8 x 1.25 13.57 14.00 4.05 4.40 0.80 5.0 2.60 M10 x 1.5 17.07 17.50 5.20 5.50 0.80 6.0 3.12 M12 x 1.75 20.48 21.00 6.24 660 0.80 8.0 4.16 M16 x 2 27.48 28.00 8.44 8.80 1.5 10.0 5.20 Nominal Screw Diameter and Thread Pitch G B E F L Wall Thickness Under Head Fillet Maximum Standard Length Transition Diameter Transition Length Juncture Radius Min. Min. Max. Max. Min. Nom M3 x 0.5 0.20 3.2 3.6 0.51 0.10 12 M4 x 0.7 0.30 4.4 4.7 0.60 0.20 20 M5 x 0.8 0.38 5.4 5.7 0.60 0.20 30 M6 x 1 0.74 6.5 6.8 0.68 0.25 30 M8 x 1.25 1.05 8.8 9.2 1.02 0.40 40 M10 x 1.5 1.45 10.8 11.2 1.02 0.40 40 M12 x 1.75 1.63 13.2 14.2 1.87 0.60 60 M16 x 2 2.25 17.2 18.2 1.87 0.60 60