Bright (uncoated)
UNF Machine Tap Spiral Flute 45°
Material ID: 5974120
Spiral flute tap with chamfer form C with a 2-3xP plug lead, for Unified National Fine thread UNF 7/8" with 14 TPI and 2B class of fit, dimensions according to DIN 2184-1 standard with 18.0mm shank and 14.5mm square drive, powder metallurgical HSS-E with bright finish and 45° helix angle for 2.5xD blind hole threading in free machining and plain carbon steel and wrought or cast aluminium
Thread Form, Unified Fine
DIN 2184-1 – Tap Standard
Internal Inch Thread Medium Class of Fit
Blind Hole Application
2.5×D Usable Tool Depth to Diameter Ratio
High Speed Cobalt Powder Metal Tool Material
Semi-Bottoming Tap Chamfer (2 – 3 Pitch Lead)
Spiral Flute Geometry
45° Helix Angle (Flute)
Right Hand Rotation / Cutting
| Product name | EX307/8 |
| Product number (SAP) | 86017731 |
| EAN number | 7320760168417 |
| Ordering code ANSI | EX307/8 |
| Thread diameter size (TDZ) | 7/8 |
| Thread diameter - millimeter (TD) | 22.225 mm |
| Threads per inch (TPI) | 14 |
| Overall length - millimeter (OAL) | 140 mm |
| Overall length - inch (OAL) | 5.5118 inch |
| Threading length - millimeter (THL) | 25 mm |
| Threading length - inch (THL) | 0.9843 inch |
| Connection diameter - inch (DCON MS) | 0.7087 inch |
| Connection diameter - millimeter (DCON MS) | 18 mm |
| Flute count (NOF) | 4 |
| Clamping width - inch (WSC) | 0.5709 inch |
| Clamping width - millimeter (WSC) | 14.5 mm |
| Clamping Length - inch (LCS) | 0.6693 inch |
| Clamping Length - millimeter (LSC) | 17 mm |
| Premachined hole diameter - inch (PHD) | 0.8031 inch |
| Premachined hole diameter - millimeter (PHD) | 20.4 mm |
| Gross weight - grams | 242.1 |
| ISO | EX307/8 |