DIN 7973 – 1990 SLOTTED RAISED COUNTERSUNK HEAD TAPPING SCREW SIZE SPECIFICATION
Screw Threadd |
ST2.2 |
ST2.9 |
ST3.5 |
(ST3.9) |
ST4.2 |
ST4.8 |
ST5.5 |
ST6.3 |
P |
Pitch |
0.8 |
1.1 |
1.3 |
1.3 |
1.4 |
1.6 |
1.8 |
1.8 |
a |
max |
0.8 |
1.1 |
1.3 |
1.3 |
1.4 |
1.6 |
1.8 |
1.8 |
dk |
max=nominal size |
4.3 |
5.5 |
6.8 |
7.5 |
8.1 |
9.5 |
10.8 |
12.4 |
min |
4 |
5.2 |
6.44 |
7.14 |
7.74 |
9.14 |
10.37 |
11.97 |
f |
≈ |
0.7 |
0.9 |
1.2 |
1.3 |
1.4 |
1.5 |
1.7 |
2 |
k |
≈ |
1.3 |
1.7 |
2.1 |
2.3 |
2.5 |
3 |
3.4 |
3.8 |
n |
Nominal Size |
0.6 |
0.8 |
1 |
1 |
1.2 |
1.2 |
1.6 |
1.6 |
max |
0.8 |
1 |
1.2 |
1.2 |
1.51 |
1.51 |
1.91 |
1.91 |
min |
0.66 |
0.86 |
1.06 |
1.06 |
1.26 |
1.26 |
1.66 |
1.66 |
r |
max |
0.8 |
1.1 |
1.4 |
1.5 |
1.6 |
1.9 |
2.1 |
2.4 |
t |
max |
1.15 |
1.5 |
1.9 |
2.05 |
2.25 |
2.6 |
2.95 |
3.45 |
min |
0.95 |
1.25 |
1.55 |
1.7 |
1.85 |
2.15 |
2.45 |
2.85 |
y |
max |
Type C |
2 |
2.6 |
3.2 |
3.5 |
3.7 |
4.3 |
5 |
6 |
Type F |
1.6 |
2.1 |
2.5 |
2.7 |
您好!Please Login