Hexagon drill-tail screws (also known as self-drilling hex head screws) paired with transparent washers are integrated fasteners designed for quick, leak-proof installation on metal, aluminum, or PVC profiles. The drill-tail tip eliminates pre-drilling, while the transparent washer (typically made of EPDM or PC) provides excellent sealing, corrosion resistance, and invisible aesthetics—ideal for outdoor or moisture-prone applications. 
| item | value |
| finish | zinc plated |
| measurement system | Metric |
| application | Healthcare, Food & Beverage, General Industry, Heavy Industry |
| Head Type | hexagon head |
| place of origin | Hebei |
| tapping screws type | hexagon head tapping screws |
| Thread Direction | Right Hand |
| Fastener Grade & Class | Grade 8 |
| customized support | OEM, ODM, OBM |
| model number | M4.2 |
| Drive Style | No |
| Fastener Intended Use | Drywall |
| Fastener Features | hexagon head |
FAQ
Q1:How many coutries you already exported ?
A1:Exported to more than 50 countries mainly from America, Russia, UK, Kuwait, Egypt, Turkey,Jordan,etc.
Q2:How can l get some samples?
A2:Small samples in store and can provide the samples for free. Catalgue is available, most patternswe have ready samples in stock.Customized samples will take about 5-7days.
Q3:What is the delivery ?
A3:Sample order's delivery time is 5-7 days. Container orders are about 15-20 days