CSK
CSK Screws (Countersunk Head)
Our Countersunk (CSK) Socket Head Screws are designed to sit flush with the mating surface, providing a smooth, streamlined finish. Engineered with a conical head and an internal hex drive, these fasteners are perfect for applications where protruding bolt heads would interfere with moving parts or compromise aesthetics. Widely used in machinery assembly, architectural fittings, and high-precision equipment.
Technical Specifications
| Head Style | Flat Countersunk (Conical profile) |
|---|---|
| Drive Type | Hex Socket (Allen Key), Slotted, or Phillips |
| Countersink Angle | 90° (Metric Standard) or 82° (Imperial Standard) |
| Size Range | M3 to M24 | 1/8” to 1” |
| Length | 6 mm to 150 mm (Measured including the head) |
| Standards | DIN 7991, ISO 10642, ASME B18.3, BS 2470 |
| Materials | High Tensile Steel (10.9, 12.9), Stainless Steel (304, 316), Brass |
| Finish | Self-Color (Black), Zinc Plated, Nickel Plated, Passivated |
Key Features & Applications
- Flush / Surface-Level Fit
- Aerodynamic & Streamlined
- High Torque Transmission
- Prevents Snagging on Moving Parts
- Tool & Die Making
- Automotive Body Panels
- Architectural Glazing
- Conveyor Belt Systems
