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¢Ã Hexagon Socket Head Cap Screws Unit : mm
Thread Size (d) M1.6 M2 M2.5 M3 M4 M5 M6 M8 M10 M12 (M14) M16 (M18) M20 M24
Thread Pitch (p) 0.35 0.4 0.45 0.5 0.7 0.8 1 1.25 1.5 1.75 2 2 2.5 2.5 3
b (ref.) 15 16 17 18 20 22 24 28 32 36 40 44 48 52 60
ds Nominal Size 1.6 2 2.5 3 4 5 6 8 10 12 14 16 18 20 24
Tolerance 0
-0.14 		0
-0.18 		0
-0.22 		0
-0.27 		0
-0.33
dk Nominal Size 3 3.8 4.5 5.6 7 8.5 10 13 16 18 21 24 27 30 36
Tolerance 1) +0.14 ¡¾0.18 ¡¾0.22 ¡¾0.27 ¡¾0.33 ¡¾0.39
k Nominal Size 1.6 2 2.5 3 4 5 6 8 10 12 14 16 18 20 24
Tolerance 0
-0.14 		0
-0.18 		0
-0.30 		0
-0.36 		0
-0.43 		0
-0.52
v Max 0.16 0.2 0.25 0.3 0.4 0.5 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2 2.4
s Nominal Size 1.5 1.5 2 2.5 3 4 5 6 8 10 12 14 14 17 19
Tolerance 5) +0.060
+0.020 		+0.080
+0.020 		+0.105
+0.030 		+0.130
+0.040 		+0.230
+0.050 		+0.275
+0.065
e Min 1.73 1.73 2.3 2.87 3.44 4.58 5.72 6.86 9.15 11.43 13.72 16.00 16.00 19.44 21.73
t Min 0.7 1 1.1 1.3 2 2.5 3 4 5 6 7 8 9 10 12
r Min 0.7 0.1 0.1 0.1 0.2 0.2 0.25 0.4 0.4 0.6 0.6 0.6 0.6 0.8 0.8
da Min 2 2.6 3.1 3.6 4.7 5.7 6.8 9.2 11.2 14.2 16.2 18.2 20.2 22.4 26.4
Z1 Approx - - - - - 0.9 1 1.2 1.5 2 2 2 0.5 2.5 3