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Tornillos de rosca, cabeza plana ranurada

Dibujos dimensionales y diagramas técnicos

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Dimensiones clave y parámetros técnicos

Dimensions in mm - source UNI 6951Withdrawn

Publication date: 11-1978

Ø
P
dk max
dk min
k max
k min
t max
t min
n max
n min Y form C Y form F
ST 2.2
  1. 0.8
4.2
3.9
1.35
1.15
0.8
0.55
0.8
0.66 2 1.6
ST 2.9
1.1
5.6
5.3
1.75
1.5
1
0.75
1
0.86 2.6 2.1
ST 3.5
1.3
6.9
6.54
2.1
1.85
1.25
0.95
1.2
1.06 3.2 2.5
ST 3.9
1.3
7.5
7.14
2.25
2
1.4
1.05
1.2
1.06 3.5 2.7
ST 4.2
1.4
8.2
7.84
2.45
2.15
1.5
1.15 1.51 1.26 3.7 2.8
ST 4.8
1.6
9.5
9.14
2.8
2.5
1.7
1.35 1.51 1.26 4.3 3.2
ST 5.5
1.8
10.8
10.37
3.2
2.85
1.95
1.55 1.91 1.66 5 3.6
ST 6.3
1.8
12.5
12.07
3.65
3.3
2.2
1.8 1.91 1.66 6 3.6

UNI 6951 - ≈ weigth, in kg x1000 pcs, (ρ=7,85 kg/dm3) - commercial lengths

thread size ST 2 ST 2.9 ST 3.5 ST 3.9 ST 4.2 ST 4.8 ST 5.5 ST 6.3
nominal length l
4.5 0.174
6.5 0.214 0.424
9.5 0.274 0.532 0.84 1.07 1.26 1.85
13 0.404 0.658 1.02 1.29 1.5 2.18 3.24 4.32
16 0.766 1.17 1.48 1.71 2.48 3.62 4.86
19 0.874 1.32 1.67 1.92 2.74 4 5.4
22 1.47 1.86 2.13 3.02 4.38 5.94
25 1.62 2.05 2.34 3.3 4.76 6.48
32 2.83 3.96 5.67 7.74
38 4.52 6.45 8.82