Steam Tempered (Steam Oxide) Surface Treatment
UNF Machine Tap Spiral Flute 45°
Material ID: 5973908
Spiral flute tap with chamfer form C with a 2-3xP plug lead, for Unified National Fine thread UNF 1" with 12 TPI and 2B class of fit, dimensions according to ISO 529 standard with 18.0mm shank and 14.0mm square drive, powder metallurgical HSS-E with steam tempered surface finish and 45° helix angle for 2.5xD blind hole threading in general purpose applications
Thread Form, Unified Fine
ISO 529 – 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 | E0331 |
| Product number (SAP) | 86015124 |
| EAN number | 7320760570197 |
| Ordering code ANSI | E0331 |
| Thread diameter size (TDZ) | 1" |
| Thread diameter - millimeter (TD) | 25.4 mm |
| Threads per inch (TPI) | 12 |
| Overall length - millimeter (OAL) | 130 mm |
| Overall length - inch (OAL) | 5.1181 inch |
| Threading length - millimeter (THL) | 35 mm |
| Threading length - inch (THL) | 1.378 inch |
| Connection diameter - inch (DCON MS) | 0.7087 inch |
| Connection diameter - millimeter (DCON MS) | 18 mm |
| Flute count (NOF) | 4 |
| Clamping width - inch (WSC) | 0.5512 inch |
| Clamping width - millimeter (WSC) | 14 mm |
| Clamping Length - inch (LCS) | 0.7087 inch |
| Clamping Length - millimeter (LSC) | 18 mm |
| Premachined hole diameter - inch (PHD) | 0.9154 inch |
| Premachined hole diameter - millimeter (PHD) | 23.25 mm |
| Gross weight - grams | 260 |
| ISO | E0331 |