Hex Washer Head Screws
Hex Washer Head Screws are a versatile, high-performance fastening solution engineered to combine strong clamping force with enhanced surface protection. Its signature hex washer head integrates two key functions: the hexagonal shape enables secure grip with wrenches or socket tools (preventing slippage during tightening), while the built-in washer distributes pressure evenly across the substrate—avoiding surface dents, cracks, or damage, and eliminating the need for separate washers.
Available in both self-drilling and machine screw variants, this fastener adapts to diverse installation needs. Self-drilling models feature a sharp, heat-treated drill point that penetrates thin-gauge metals, wood, or composites without pre-drilling, slashing installation time. Machine screw versions, paired with pre-tapped holes, deliver reliable holding power for precision applications. The threads are precision-rolled or cut to ensure tight engagement, resisting loosening from vibration (ideal for mechanical or automotive use).
Constructed from durable materials to suit harsh environments:
• High-carbon steel: Offers exceptional tensile strength for heavy-duty loads (e.g., construction, machinery).
• 304/316 stainless steel: Provides superior corrosion resistance for outdoor, marine, or humid settings (e.g., outdoor furniture, electrical enclosures).
• Common surface treatments (zinc plating, hot-dip galvanizing, or Dacromet) further boost rust resistance and extend service life.
This screw excels across industries, including construction (metal framing), mechanical engineering (equipment assembly), electronics (appliance mounting), and furniture manufacturing (wood-to-metal connections). It complies with global standards such as ANSI/ASME B18.6.3 (U.S.) and DIN 934 (Europe), ensuring consistent dimensions and compatibility with standard tools (e.g., hex keys, socket wrenches). Suitable for both professional tradespeople and DIY projects, it balances ease of use with long-term reliability.

| Unit : mm | ||||||
| Size (d) | #4 | #6 | #8 | #10 | #12 | #14 |
| P | 1.1 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| k max | 2.8 | 3.4 | 4.1 | 4.3 | 5.4 | 5.9 |
| dk max | 6.3 | 8.3 | 8.8 | 10.5 | 11.0 | 13.5 |
| Smax | 4 | 5.5 | 7.0 | 8.0 | 8.0 | 10.0 |