Carbon Steel Self Drilling Screw-Truss Head Fast Self Tapping Screw Sheet Metal Screw

描述

1. Performance & Material Properties
   • High-Strength Alloy & Carbon Steel Construction: Machined from quenched-and-tempered C1045 carbon steel or 4140 alloy steel, delivering tensile strengths of 700–900 MPa and hardness of 38–45 HRC for exceptional shear and pull-out resistance.
   • Self-Drilling TEK-Style Point: Precision-ground flute hardened to Rc 45–50 drills through 0.5–1.5 mm mild steel or aluminum without pilot holes. Spiral flutes evacuate chips cleanly, reducing heat buildup and preventing galling on mating surfaces.
   • Self-Tapping Thread Geometry: Sharp, rolled threads form mating threads in thin sheet metal (0.8–2.0 mm) as the screw advances, ensuring high clamp load and vibration resistance without thread-locking compounds.
   • Phillips Modified Truss Head: Oversized Ø 9–12 mm low-profile head with broad, slightly domed bearing face distributes load evenly on thin substrates and resists pull-through in soft metals or composite panels.
2. Detailed Application Range
   • Roofing & Cladding: Ideal for fastening metal roofing and siding panels, soffits, fascia, gutter straps, and architectural façades in residential, commercial, and industrial buildings.
   • HVAC & Ductwork: Secure sheet-metal ducts, plenums, fittings, and grille frames where gas- and water-tight joints are critical.
   • Electrical & Data Enclosures: Mount junction boxes, control cabinets, cable‐management trays, and light fixtures in indoor and outdoor installations.
   • Light‐Gauge Framing & Equipment: Assemble steel stud tracks, purlins, signage, display fixtures, appliance housings, and automotive interior brackets where corrosion resistance and rapid assembly are essential.
3. Effortless Installation & Adjustment
   • One-Step Drill & Tap: Self-drilling tip and self-tapping thread eliminate pre-drilling and tapping operations, cutting installation time by up to 50 % and ensuring repeatable hole entry on angled or overhead surfaces.
   • Phillips #2 Drive Compatibility: Deep cruciform recess resists cam-out, engages standard Phillips bits, and delivers controlled torque up to 6 Nm with electric or pneumatic drivers.
   • Controlled Seating & Anti-Overdrive Shoulder: Built-in head shoulder prevents over-insertion and substrate distortion, yielding a clean finish that sits flush to slightly proud.
   • Clean Removal & Re-Use: Screws back out without damaging the formed hole, enabling quick rework or repositioning without thread deterioration.
4. Superior Quality & Long-Term Reliability
   • Standards & Certification: Manufactured in ISO 9001–certified facilities to ANSI B18.6.4 and DIN 7504 P tolerances (±0.1 mm on diameter, ±0.2 mm on length), ensuring global interchangeability.
   • Corrosion Resistance: Available in trivalent zinc plating (8–12 µm, ≥240 h salt-spray per ASTM B117), black-oxide for basic rust protection, or yellow-chromate for enhanced weathering.
   • Rigorous Testing: Each lot undergoes drive-torque verification, head-pull-off evaluation, and dimensional inspection to guarantee consistent performance under vibration and dynamic loads.
   • Full Traceability & Compliance: Lot-traceable from melt to finished part; RoHS- and REACH-compliant, free of hexavalent chromium and other restricted substances for environmental and regulatory peace of mind.