Washer Head Self-Drilling Screws
Washer head self-drilling screws feature an enlarged washer head that increases contact area for more stable connections. Their unique drilling tail design enables one-step drilling, tapping and locking, ensuring efficient construction. Available in a wide range of specifications, with diameters from ST2.9 to ST6.3 and lengths from 6mm to 185mm, they are suitable for steel structures, metal curtain walls, aluminum doors and windows, etc.
Core Features
Integrated Self-Drilling Point
Self-Drilling Capability: Features a drill-bit-like tip (dual-threaded or notched) that eliminates pre-drilling. Directly penetrates thin metal sheets (e.g., steel, aluminum), plastic, or wood, completing drilling, tapping, and fastening in one step.
Time & Labor Savings: Significantly boosts installation efficiency and reduces tool dependency (operable with standard electric drills).
Washer Head Design
Expanded Bearing Surface: Integrates a flat washer into the head, providing a larger load-bearing area than standard pan heads.
Anti-Sink & Anti-Loosening:
Distributes pressure to prevent surface crushing in soft materials (e.g., plastics, fiberboard);
Creates a gasket-like seal to reduce loosening risk.
Drive Types
Common Drives: Hex Washer Head (HW), Phillips (PH), Torx (T-Star), etc., balancing high-torque transmission and slip resistance.
Tool Compatibility: Compatible with impact drivers and screwdrivers. HW heads suit automated high-volume installation.
Thread & Material
Dual-Lead Threads: Coarse threads at the tip for fast drilling; fine threads behind for enhanced grip (e.g., Type 17 point).
High-Strength Materials:
Carbon steel (zinc-plated or Dacromet®-coated for rust resistance);
Stainless steel (A2/A4 grade for corrosion resistance);
Heat-treated to HRC 45+ hardness for reliable drilling performance.
Key Applications:
Steel Construction Fixing color steel roofing/wall panels, connecting C-purlins, metal partitions
Outdoor Structures Metal fencing, solar mounting frames, billboard frameworks
Wood/Composite Hybrid steel-wood connections (e.g., timber frame metal joints)
SERIVCE
Reliable After-Sales Support
Swift resolution for all technical issues & product inquiries.
20+ Years of Global Export Expertise
Proven experience in international logistics & compliance.
Detailed Product Specifications On Request
Customizable spec sheets for informed purchasing decisions.
Instant Quote Response
Submit inquiries for prompt pricing & solution proposals.
Certified Export Documentation & Timely Shipment
Hassle-free logistics with professionally prepared export papers.
Custom Packaging with Pre-Shipment Visual Verification
Branded/secure packaging with photo confirmation before dispatch.
Premium Quality at Competitive Pricing
Industry-leading products optimized for value & performance.
CONTACT US
HANDAN BOEN FASTENERS MANUFACTURING CO.,LTD
Email:shaun@boenfasteners.com
Wechat/WhatsApp/Skype/zalo:+86 13293070568 / +86 15630072814
