This product guide contains the specification for metric threaded pozi countersunk thread rolling screws, a series of standard parts available from Westfield Fasteners. The basis of this specification is the DIN standard DIN 7500.
Thread, d | M2.5 | M3 | M3.5 | M4 | M5 | M6 | M8 | |
---|---|---|---|---|---|---|---|---|
head diameter, dk | Max. | 4.7 | 5.5 | 7.3 | 8.4 | 9.3 | 11.3 | 15.8 |
head height, k | Max. | 1.5 | 1.65 | 2.35 | 2.7 | 2.7 | 3.3 | 4.65 |
recess depth, t | Min. | 1.22 | 1.48 | 1.61 | 2.06 | 2.27 | 2.73 | 3.87 |
Max. | 1.47 | 1.73 | 2.05 | 2.51 | 2.72 | 3.18 | 4.32 | |
drive, z | 1 | 1 | 2 | 2 | 2 | 3 | 4 |
Thread Size, d | M2.5 | M3 | M3.5 | M4 | M5 | M6 | M8 | M10 | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Length of Engagement | Hole Diameter dh | |||||||||||||||
St | Al | St | Al | St | Al | St | Al | St | Al | St | Al | St | Al | St | Al | |
2 | 2.25 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
2.5 | 2.25 | - | 2.75 | - | - | - | - | - | - | - | - | - | - | - | - | - |
3 | 2.30 | - | 2.75 | - | 3.20 | - | - | - | - | - | - | - | - | - | - | - |
3.5 | 2.30 | - | 2.75 | - | 3.20 | - | 3.65 | - | - | - | - | - | - | - | - | - |
4 | 2.30 | - | 2.75 | - | 3.20 | - | 3.65 | - | 4.60 | - | - | - | - | - | - | - |
5 | 2.30 | - | 2.75 | - | 3.20 | - | 3.70 | - | 4.60 | - | 5.50 | - | - | - | - | - |
6 | - | 2.30 | 2.75 | 3.20 | - | 3.70 | - | 4.60 | - | 5.50 | - | - | - | - | - | |
6.5 | - | 2.30 | - | 2.75 | 3.20 | - | 3.70 | - | 4.60 | - | 5.50 | - | 7.45 | - | - | - |
7 | - | 2.30 | - | 2.75 | 3.20 | 3.70 | - | 4.65 | - | 5.55 | - | 7.45 | - | - | - | |
7.5 | - | 2.30 | - | 2.75 | - | 3.20 | 3.70 | - | 4.65 | - | 5.55 | - | 7.45 | - | - | - |
8 | - | - | - | 2.75 | - | 3.20 | 3.70 | 4.65 | - | 5.55 | - | 7.45 | - | 9.35 | - | |
9 | - | - | - | 2.75 | - | 3.20 | - | 3.70 | 4.65 | - | 5.55 | - | 7.45 | - | 9.35 | - |
10 | - | - | - | - | - | - | - | 3.70 | 4.65 | 5.55 | - | 7.45 | - | 9.35 | - | |
10.5 | - | - | - | - | - | - | - | - | - | 4.65 | 5.55 | - | 7.45 | - | 9.35 | - |
12 | - | - | - | - | - | - | - | - | - | 4.65 | 5.60 | 7.45 | - | 9.35 | - | |
>12 to ≤15 | - | - | - | - | - | - | - | - | - | - | - | 5.60 | 7.45 | - | 9.35 | - |
>15 to ≤16 | - | - | - | - | - | - | - | - | - | - | - | 5.60 | 7.50 | 9.35 | - | |
>16 to ≤18 | - | - | - | - | - | - | - | - | - | - | - | 5.60 | - | 7.50 | 9.35 | - |
>18 to ≤20 | - | - | - | - | - | - | - | - | - | - | - | - | - | 7.50 | 9.35 | |
>20 to ≤24 | - | - | - | - | - | - | - | - | - | - | - | - | - | 7.50 | - | 9.35 |
>24 to ≤30 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 9.40 |