E6531/2

HSS Drill-Tap Combination Tool with 27° Spiral Flute, NPT, ANSI Standard
Ordering number: 5978392

Combination drill-tap with a 27° spiral flute, for National Pipe Taper thread NPT 1/2" with 14 TPI and Normal class of fit, dimensions according to ANSI standard with 0.6870" shank and 0.6870" square drive, HSS with bright finish and 27° helix angle for 1.5xD through or blind hole threading in free machining steel

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Product Feature

Bright (uncoated)

Thread Form, American National Pipe Taper

ANSI – Tap Standards

Normal Fit Class for Pipe Thread

Through or Blind Hole Application

1.5×D Usable Tool Depth to Diameter Ratio

High Speed Steel Tool Material

Spiral Flute Geometry

27° Helix Angle (Flute)

Right Hand Rotation / Cutting

Product Detail

Description	Value
EAN number	7320760297261
EDP number	0297261
Product name	E6531/2
Ordering code ANSI	E6531/2
Gross weight - grams	155.3
Thread diameter size (TDZ)	1/2
Threads per inch (TPI)	14
Thread diameter - inch (TD)	0.7087 inch
Overall length - fractional inch (OAL)	4.3/8
Usable Length - fractional inch (LU)	1.3/8
Connection diameter - inch (DCON MS)	0.687 inch
Clamping width - inch (WSC)	0.515 inch
Flute count (NOF)	4
ANSI	E6531/2
ISO	E6531/2

Cutting Conditions

P - Steel and cast steel (steels with alloy content ≤ 10% and a hardness of < 45HRC)

P1

P1 - Free machining steel (carbon steels with increased machinability)

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	Suitability	v_c
P1.1 - Free machining sulfurized carbon steel with a hardness of < 240HB	help_outline Primary use	59 ft/min
P1.2 - Free machining sulfurized and phosphorized carbon steel with a hardness of < 180HB	help_outline Primary use	66 ft/min
P1.3 - Free machining sulfurized/phosphorized and leaded carbon steel with a hardness of < 180HB	help_outline Primary use	72 ft/min

P2

P2 - Plain carbon steel (steels comprised of mainly iron and carbon)

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	Suitability	v_c	f
P2.1 - Plain low carbon steel containing < 0.25%C with a hardness of < 180HB	help_outline Primary use	66 ft/min
P2.2 - Plain medium carbon steel containing < 0.55%C with a hardness of < 240HB	help_outline Possible use	59 ft/min

P3

P3 - Alloy steel (carbon steels with an alloying content ≤ 10%)

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	Suitability	v_c	f
P3.1 - Alloy steel with a hardness of < 180HB	help_outline Possible use	49 ft/min
P3.2 - Alloy steel with a hardness of 180 - 260HB	help_outline Possible use	39 ft/min

N - Non-ferrous metals (metals including alloys without an appreciable amount of iron)

N1

N1 - Wrought aluminium

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	Suitability	v_c	f
N1.2 - Wrought aluminium alloys with a hardness of 60 - 100HB	help_outline Possible use	46 ft/min
N1.3 - Wrought aluminium alloys with a hardness of 100 - 150HB	help_outline Possible use	30 ft/min

N3

N3 - Copper or copper alloys

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	Suitability	v_c	f
N3.1 - Free-cutting copper-alloys materials with excellent machining properties	help_outline Possible use	66 ft/min
N3.2 - Short-chip copper-alloys with good to moderate machining properties	help_outline Possible use	49 ft/min

N4

N4 - Polymers(synthetic or semi-synthetic materials)

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	Suitability	v_c	f
N4.1 - Thermoplastic polymers	help_outline Possible use	82 ft/min