Facom
Facom Countersink Drill Bit Set, 10.4 mm, 15.5 mm, 20.5 mm, 25 mm Head, 90°, 4 Piece(s)
Part No.
229.TTJ4
Procurement Intelligence
The Facom TTJ4 is a 4-piece 90° countersink drill bit set with stepped diameters (10.4–25 mm) designed for creating conical recesses in metal fabrication and assembly workflows. Installation context includes fastener counterboring in sheet metal, structural assemblies, and precision machining. Critical verification: confirm 90° angle compatibility with your fastener specifications (ISO 2919 or equivalent standard).
Metal fastener countersink operations
Before ordering — verify:
| ☐ | 90° angle specification |
| ☐ | Four-piece graduated sizing |
| ☐ | Fastener compatibility verification |