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EX311/4EX311/4

UNF Machine Tap Spiral Flute 45°
Ordering number: 5974146

Spiral flute tap with chamfer form C with a 2-3xP plug lead, for Unified National Fine thread UNF 1/4" with 28 TPI and 2B class of fit, dimensions according to DIN 2184-1 standard with 7.0mm shank and 5.5mm square drive, powder metallurgical HSS-E with steam tempered surface finish and 45° helix angle for 2.5xD blind hole threading in alloy steel

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Product Feature

Steam Tempered (Steam Oxide) Surface Treatment

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 Detail
DescriptionValue
EAN number7320760168455
Thread diameter size (TDZ)1/4
Product number (SAP)86017735
Ordering code ANSIEX311/4
Threading length - millimeter (THL)10 mm
Gross weight - grams20.3
Threads per inch (TPI)28
Connection diameter - millimeter (DCON MS)7 mm
Usable Length - millimeter (LU)30 mm
Thread diameter - millimeter (TD)6.35 mm
Overall length - millimeter (OAL)80 mm
Flute count (NOF)3
Clamping width - millimeter (WSC)5.5 mm
Clamping Length - millimeter (LSC)8 mm
Premachined hole diameter - millimeter (PHD)5.5 mm
Cutting Conditions