Round Head Self Drilling TEK Screw -Pan Head Self Tapping Sheet Metal Screw

描述

1. Performance & Material Properties
   • High-Strength Carbon & Alloy Steel: Forged from quenched-and-tempered C1045 carbon steel or 4140 alloy steel, delivering tensile strengths of 750–900 MPa and Rockwell hardness of 38–48 HRC for outstanding shear and pull-out resistance in thin metals.
   • Self-Drilling TEK-Style Point: Precision-ground flute hardened to Rc 45–50 drills through 0.8–3.0 mm mild steel or aluminum without pre-drilling. Spiral chip-evacuation geometry minimizes heat buildup and prevents galling, ensuring clean hole entry every time.
   • Full-Thread Shank & Pan Head: Rolled threads extend from beneath the head to the tip, maximizing clamp load and vibration resistance. The Ø10–12 mm pan head with deep Phillips recess distributes bearing pressure evenly and resists cam-out up to 6 Nm.
   • Durable Galvanized Finish: Trivalent zinc plating (8–12 µm) with yellow or clear passivation offers ≥240 h salt-spray protection (ASTM B117), delivering long-term corrosion resistance even in humid or mildly corrosive environments.
2. Detailed Application Range
   • Metal Roofing & Cladding: Fasten corrugated, standing-seam, or composite roof and wall panels, soffits, fascia, gutter straps, and flashings in residential and commercial projects—no pilot hole needed.
   • HVAC & Ductwork: Secure spiral and rectangular ducts, plenums, fan housings, access doors, and grille frames where vibration-tight, leak-resistant joints are critical.
   • Electrical & Equipment Enclosures: Mount junction boxes, control cabinets, cable trays, light fixtures, and machinery guards in indoor or sheltered outdoor installations, ensuring reliable grounding and strain relief.
   • Light-Gauge Framing & Fabrication: Ideal for steel stud tracks, purlins, signage, display systems, appliance housings, and automotive interior brackets—enabling rapid assembly on thin-sheet metal substrates.
3. Effortless Installation & Operation
   • One-Step Drill, Tap & Fasten: Integrated TEK point and full-thread design eliminate separate pilot-drilling and thread-forming operations—cutting installation time by up to 50 % and ensuring repeatable hole alignment even on overhead or angled surfaces.
   • Phillips #2 Drive Compatibility: Deep cruciform recess resists cam-out and engages standard Phillips bits or low-torque electric/pneumatic drivers, reducing bit wear and operator fatigue.
   • Controlled Seating & Anti-Overdrive Feature: Built-in shoulder under the head prevents over-insertion and substrate deformation; screws seat flush or slightly proud for a neat finish and consistent clamp load.
   • Assortment Kit Convenience: Supplied in a 350-piece kit covering common diameters (M4–M6, #8–#10) and lengths (10–35 mm), organized in a clear, compartmentalized case for quick size selection and minimum downtime.
4. Superior Quality & Long-Term Reliability
   • ISO & ANSI/DIN Compliance: Manufactured in ISO 9001–certified plants to ANSI B18.6.4 and DIN 7504 P tolerances (±0.1 mm on diameter, ±0.2 mm on length) for global interchangeability and dimensional accuracy.
   • Rigorous Testing & Traceability: Each batch undergoes drive-torque verification, head-pull-off evaluation, and dimensional inspection. Lot-coded from melt to finished screw with material certificates, ensuring full traceability.
   • Corrosion & Finish Integrity: Zinc-plated screws pass ≥240 h salt-spray per ASTM B117 without pitting; post-plating passivation restores the chromium-oxide barrier, preventing surface staining and enhancing durability.
   • Environmental & Regulatory Assurance: RoHS- and REACH-compliant; free of hexavalent chromium and other restricted substances, providing both performance reliability and environmental peace of mind.