ASUDA FASTENER
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 |
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