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The 304 Countersunk Cross Drill Tail Screw is a superior fastening solution crafted from high-grade 304 stainless steel, known for its exceptional corrosion resistance and durability. This screw features a self-drilling tail that allows for quick and efficient installation without the need for pre-drilling, saving time and labor costs. The countersunk head design ensures that the screw sits flush with the surface of the material, providing a neat and clean appearance ideal for decorative and structural applications alike. Its cross-shaped drive offers improved torque control and ease of driving.
Thread size (d) | |||
P | Pitch | ||
a | Maximum | ||
dk | theory | Maximum | |
Actual value | Maximum | ||
Minimum | |||
k | Maximum | ||
r | Maximum | ||
Slot number | |||
M1 | Reference | ||
depth | H-Type | Maximum | |
Minimum | |||
M2 | Reference | ||
depth | Z-Type | Maximum | |
Minimum | |||
Drilling range (plate thickness) | ≥ | ||
≤ | |||
Lg (minimum) | |||
Thousand pieces of steel weigh ≈ kg | |||
ST2.9 | ST3.5 | ST4.2 | ST4.8 | ST5.5 | ST6.3 |
1.1 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
1.1 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
6.3 | 8.2 | 9.4 | 10.4 | 11.5 | 12.6 |
5.5 | 7.3 | 8.4 | 9.3 | 10.3 | 11.3 |
5.2 | 6.9 | 8 | 8.9 | 9.9 | 10.9 |
1.7 | 2.35 | 2.6 | 2.8 | 3 | 3.15 |
1.2 | 1.4 | 1.6 | 2 | 2.2 | 2.4 |
1 | 2 | 2 | 2 | 3 | 3 |
3.2 | 4.4 | 4.6 | 5.2 | 6.6 | 6.8 |
2.1 | 2.4 | 2.6 | 3.2 | 3.3 | 3.5 |
1.7 | 1.9 | 2.1 | 2.7 | 2.8 | 3 |
3.2 | 4.3 | 4.6 | 5.1 | 6.5 | 6.8 |
2 | 2.2 | 2.5 | 3.05 | 3.2 | 3.45 |
1.6 | 1.75 | 2.05 | 2.6 | 2.75 | 3 |
0.7 | 0.7 | 1.75 | 1.75 | 1.75 | 2 |
1.9 | 2.25 | 3 | 4.4 | 5.25 | 6 |
- | - | - | - | - | - |
- | - | - | - | - | - |
①, The working performance of the drill bit (diameter dp) shall be in accordance with GB/T 3098.11. |