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| Customization: | Available |
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| Material: | Stainless Steel |
| Shape of Head: | Hexagon |
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
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| Stainless Steel Flange Hex Head Self Drilling Tapping Screw | |
| Material: | Carbon Steel, Stainless Steel, Brass etc. |
| Standards: | DIN7504, GB/T 16824.1, ISO 7085, etc. |
| Size: | ST3.5, ST3.9, ST4.2, ST4.8, ST5.5, ST6.3 |
| Class: | HV 420-530, HRC 41-50 |
| Finish: | Plain, Black, Zinc, Yellow Zinc, HDG, Dacromet, etc. |
| Screw Driver: | Hexagonal |
| Thread Size | ST2.9 | ST3.5 | (ST3.9) | ST4.2 | ST4.8 | (ST5.5) | ST6.3 | |
| P | Pitch | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| a | max | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| c | min | 0.4 | 0.6 | 0.6 | 0.8 | 0.9 | 1 | 1 |
| dc | max | 6.3 | 8.3 | 8.3 | 8.8 | 10.5 | 11 | 13.5 |
| min | 5.8 | 7.6 | 7.6 | 8.1 | 9.8 | 10 | 12.2 | |
| e | min | 4.28 | 5.96 | 5.96 | 7.59 | 8.71 | 8.71 | 10.95 |
| k | max | 2.8 | 3.4 | 3.4 | 4.1 | 4.3 | 5.4 | 5.9 |
| min | 2.5 | 3 | 3 | 3.6 | 3.8 | 4.8 | 5.3 | |
| kw | min | 1.3 | 1.5 | 1.5 | 1.8 | 2.2 | 2.7 | 3.1 |
| r | max | 0.4 | 0.5 | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 |
| s | max | 4 | 5.5 | 5.5 | 7 | 8 | 8 | 10 |
| min | 3.82 | 5.32 | 5.32 | 6.78 | 7.78 | 7.78 | 9.78 | |
| dp | 2.3 | 2.8 | 3.1 | 3.6 | 4.1 | 4.8 | 5.8 | |
| Drilling range (thickness) | 0.7~1.9 | 0.7~2.25 | 0.7~2.4 | 1.75~3 | 1.75~4.4 | 1.75~5.25 | 2~6 | |
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| Q1: What thread standards do you follow? |
| A1: Our screws comply with DIN, ISO, ANSI, and JIS standards, and can also be customized according to customer drawings. |
| Q2: How do you pack the screws for export? |
| A2: Standard packing includes bulk cartons with inner boxes or small polybags, placed on pallets for container shipping. Custom boxes or barcoded packaging are available. |
| Q3: What thread types do you supply? |
| A3: We offer fine thread, coarse thread, and special thread profiles optimized for sheet metal, steel structures, and roofing applications. |
| Q4: How do you control product quality? |
| A4: Every batch is tested for torque, hardness, thread precision, and salt spray corrosion resistance, following ISO 9001 quality system standards. |
| Q5: Do you offer OEM or customized production? |
| A5: Yes. We can produce screws according to samples, technical drawings, or specific drive/head combinations, and offer custom packaging and labeling. |
| Q6: What industries do your self-tapping screws serve? |
| A6: Our screws are widely used in automotive, electronics, construction, furniture, and machinery assembly industries. |
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