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Materials & Applications
Compatibility
Materials & Applications
Recommended use cases for this product across common industrial materials and jobsite applications.
Mild and medium steel, Aluminum, Brass, Copper, Plastics, Non-ferrous metals
Precision countersinking
Flat-head fastener seating
Deburring pre-drilled holes
Assembly and finishing operations
Fabrication and maintenance work
Product details
Technical Description
Essential product information, specifications, and recommended use before ordering.
Champion CSK12-1 82° HSS Piloted Zero-Flute Countersink | 3/8" Screw x 3/8" Pilot — Weldon-Style Piloted Countersink
The CSK12-1 is an exact 82° HSS piloted zero-flute countersink for 3/8" flat-head screws. Its fixed 3/8" pilot follows the existing hole while the single cutting edge creates a concentric, chatter-resistant countersink for clean fastener seating.
This Champion CSK-PILOTED configuration has a 49/64" body diameter, 1/2" shank and 2-5/8 overall length. The Weldon-style zero-flute design supports controlled material removal, smooth finishes and repeatable alignment in pre-drilled holes.
Technical Specifications
| Manufacturer part number | CSK12-1 |
|---|---|
| Exact screw size | 3/8" flat-head screw |
| Included angle | 82° |
| Tool style | Piloted zero-flute, Weldon-style countersink |
| Body diameter | 49/64" |
| Pilot diameter | 3/8" |
| Shank diameter | 1/2" |
| Overall tool length | 2-5/8 |
| Material | High-speed steel (HSS) |
| Source variant configuration | For screws 3/8" | Shank 1/2" | Pilot 3/8" |
Applications
Use this Champion CSK12-1 for precision countersinking, deburring pre-drilled holes, edge finishing and flat-head screw seating in steel, aluminum, brass, copper, plastics and other suitable non-ferrous materials. It is designed for portable power drills and drill presses where the pilot can engage an existing hole.
Piloted Countersinking Accuracy
The 3/8" pilot helps keep the 49/64" cutting body centered in the pre-drilled hole, reducing wandering and supporting a uniform 82° chamfer. Match the pilot to the hole and the cutter to the exact 3/8" screw size before operation.
Confirm the pilot fits the existing hole, secure the workpiece, use moderate RPM and apply light pressure for a clean finish. Cutting tools may shatter if misused; wear appropriate PPE and follow the machine and tool manufacturer's instructions.
Most Interesting Product Feature
Product highlight
Most Interesting Product Feature
- Piloted Zero-Flute Accuracy — The integrated pilot follows the existing hole to keep the countersink perfectly centered, producing uniform, professional chamfers with zero chatter and exceptional surface finish.
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