Csk Head Self Drilling Screw
The Csk Head Self Drilling Screw (Csk stands for “Countersunk”) is a one-step fastening solution designed to drill, tap, and secure materials in a single operation—eliminating the need for pre-drilled holes. Its signature countersunk head sits flush with the material surface after installation, delivering a smooth, unobtrusive finish ideal for applications where aesthetics and minimal protrusion matter.
Key Features:
• Head Style: Countersunk (Csk) –With its tapered design, when used in conjunction with a countersink hole on the material surface, it embeds completely without protrusion after installation. It is suitable for scenarios requiring a flat appearance (e.g., furniture panels, equipment enclosures).
• Self-Drilling Function: Equipped with a sharp, threaded drill point (often with a split or fluted tip) that penetrates materials like steel, aluminum, or wood directly—saving time and reducing assembly steps.
• Drive Type: Common options include Phillips, Pozidriv, or Torx – all engineered to prevent “cam-out” (slippage during tightening) and ensure consistent torque transfer.
• Material & Coating: Typically made of high-carbon steel (for strength) or stainless steel (for corrosion resistance); coatings like zinc plating (anti-rust for dry environments) or galvanization (for outdoor/moist settings) extend service life.
• Applications: Widely used in construction (metal framing), automotive (body panels), electronics (enclosure assembly), and furniture manufacturing—especially for thin to medium-thickness materials.
| Unit:mm | ||||||
| size | M2.9 | M3.5 | M4.2 | M4.8 | M5.5 | M6.3 |
| pitch | 1.1 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| dk | 5.5 | 7.3 | 8.4 | 9.3 | 10.3 | 11.3 |
| k | 1.7 | 2.35 | 2.6 | 2.8 | 3 | 3.15 |