Product Description
UNC HSS Spiral Point Ground Hand & Machine Taps
UK made high speed steel taps for cutting Unified National Coarse (UNC) internal threads. Suitable for hand or machine tapping, these ground taps feature straight flutes with an angular spiral point that directs swarf ahead of the cutting action.
Available Sizes
| Thread Size | Threads Per Inch |
|---|---|
| No.4 UNC | 40 TPI |
| No.6 UNC | 32 TPI |
| No.8 UNC | 32 TPI |
| No.10 UNC | 24 TPI |
| 1/4 inch UNC | 20 TPI |
| 5/16 inch UNC | 18 TPI |
| 3/8 inch UNC | 16 TPI |
| 7/16 inch UNC | 14 TPI |
| 1/2 inch UNC | 13 TPI |
| 9/16 inch UNC | 12 TPI |
| 5/8 inch UNC | 11 TPI |
| 3/4 inch UNC | 10 TPI |
| 7/8 inch UNC | 9 TPI |
| 1 inch UNC | 8 TPI |
Key Features
- High speed steel (HSS) construction
- Ground UNC cutting threads
- Spiral point design for through-hole tapping
- Straight flutes allow coolant access
- Suitable for hand tapping without a separate lead tap
- UK made
BS 1580-1 covers Unified screw threads of 1/4 inch diameter and larger. BS 1580-3 covers numbered Unified threads below 1/4 inch. These references relate to the thread system. Please contact us before ordering to confirm compliance certification availability.
Use the correct tapping drill and a suitable cutting lubricant for the workpiece material. Keep the tap aligned with the hole and allow clearance for swarf to exit ahead of the cutting point.
Related Products
- Adjustable Tap Holder Wrenches
- Metric Coarse HSS Spiral Point Ground Hand & Machine Taps
- BA HSS Spiral Point Ground Hand & Machine Taps
- Metric and Imperial Thread Data Guide
Specifications are intended as a guide. Confirm the required UNC thread size, TPI and suitability for your workpiece before ordering.
