This product guide contains the specification for metric threaded socket head button screws as available from Westfield Fasteners. The basis of this specification is the DIN standard DIN 7982C.
thread diameter | 2.2 | 2.9 | 3.5 | 3.9 | 4.2 | 4.8 | 5.5 | 6.3 | ||
---|---|---|---|---|---|---|---|---|---|---|
thread pitch, p | 0.8 | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 | ||
distance to first full thread, a | max | 0.8 | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 | |
head diameter, dk | max=nom | 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 | ||
head height, k | ≈ (approx.) | 1.3 | 1.7 | 5.1 | 2.3 | 2.5 | 3 | 3.4 | 3.8 | |
radius under head, r | max | 0.8 | 1.1 | 1.4 | 1.5 | 1.6 | 1.9 | 2.1 | 2.4 | |
length of threaded end, y max | Type C | 2 | 2.6 | 3.2 | 3.5 | 3.7 | 4.3 | 5 | 6 | |
S drive | - | - | - | SQ1 | SQ2 | SQ2 | - | - |
Nominal Length | Type C | |
---|---|---|
min | max | |
4.5 | 3.7 | 5.3 |
6.5 | 5.7 | 7.3 |
9.5 | 8.7 | 10.3 |
13 | 12.2 | 13.8 |
16 | 15.2 | 16.8 |
19 | 18.2 | 19.8 |
22 | 21.2 | 22.8 |
25 | 24.2 | 25.8 |
32 | 30.7 | 33.3 |
38 | 36.7 | 39.3 |