20251X8

2025 UNC Dienut
Ordering number: 6009093

Hexagon die nut, for Unified National Coarse thread UNC 1" with 8 TPI, dimensions according to ANSI standard with 1.13/16" width across flat and 1" thickness, made from chromium tool steel with bright finish for repairing damaged thread in free machining and plain carbon steel and gray, malleable, ductile and compacted graphite cast-iron

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Product Feature

Bright (uncoated)

Thread Form, Unified Coarse

ANSI – Tap Standards

Chromium Steel Tool Material

Right Hand Rotation / Cutting

Product Detail

Description	Value
EAN number	698464039041
Product name	20251X8
Thread diameter size (TDZ)	1"
EDP number	1410259
Threads per inch (TPI)	8
Ordering code ANSI	20251X8
Drive size - fractional inch (DRVS)	1.13/16
Overall length - fractional inch (OAL)	1"
Drive size - inch (DRVS)	1.8125 inch
Drive size - millimeter (DRVS)	46.04 mm
Overall length - inch (OAL)	1 inch
Overall length - millimeter (OAL)	25.4 mm
ANSI	20251X8
ISO	20251X8

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	26 ft/min
P1.2 - Free machining sulfurized and phosphorized carbon steel with a hardness of < 180HB	help_outline Primary use	30 ft/min
P1.3 - Free machining sulfurized/phosphorized and leaded carbon steel with a hardness of < 180HB	help_outline Primary use	30 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	23 ft/min
P2.2 - Plain medium carbon steel containing < 0.55%C with a hardness of < 240HB	help_outline Primary use	20 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	20 ft/min
P3.2 - Alloy steel with a hardness of 180 - 260HB	help_outline Possible use	16 ft/min

P4

P4 - Tool steel (special alloy steel for tools, dies and molds)

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	Suitability	v_c	f
P4.1 - Tool steel with a hardness of < 26HRC	help_outline Possible use	10 ft/min

M - Stainless steel (corrosion resistant steels with ≥ 11% chromium content)

M1

M1 - Ferritic stainless steel (straight chromium non-hardenable alloys)

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	Suitability	v_c	f
M1.1 - Stainless steel, ferritic with a hardness of < 160HB	help_outline Possible use	7 ft/min
M1.2 - Stainless steel, ferritic with a hardness of 160 - 220HB	help_outline Possible use	7 ft/min

M2

M2 - Martensitic stainless steel (straight chromium hardenable alloys)

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	Suitability	v_c	f
M2.1 - Stainless steel, martensitic with a hardness of < 200HB	help_outline Possible use	7 ft/min
M2.2 - Stainless steel, martensitic with a hardness of 200 - 280HB	help_outline Possible use	7 ft/min

M3

M3 - Austenitic stainless steel (chromium-nickel and chromium-nickel-manganese alloys)

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	Suitability	v_c	f
M3.1 - Stainless steel, austenitic with a hardness of < 200HB	help_outline Possible use	7 ft/min
M3.2 - Stainless steel, austenitic with a hardness of 200 - 260HB	help_outline Possible use	7 ft/min

K - Cast Iron (castings of iron and carbon alloys with > 2% carbon content)

K1

K1 - Gray iron (GG) (iron-carbon castings with a lamellar graphite microstructure)

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	Suitability	v_c
K1.1 - Gray iron, ferritic or ferritic-pearlitic with a hardness of < 180HB	help_outline Primary use	26 ft/min
K1.2 - Gray iron, ferritic-pearlitic or pearlitic with a hardness of 180 - 240HB	help_outline Primary use	20 ft/min
K1.3 - Gray iron, pearlitic with a hardness of 240 - 280HB	help_outline Possible use	13 ft/min

K2

K2 - Malleable iron (GTS/GTW) (heat-treated iron-carbon castings with a graphite-free microstructure)

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	Suitability	v_c
K2.1 - Malleable iron, ferritic with a hardness of < 160HB	help_outline Primary use	23 ft/min
K2.2 - Malleable iron, ferritic or pearlitic with a hardness of 160 - 200HB	help_outline Primary use	20 ft/min
K2.3 - Malleable iron, pearlitic with a hardness of 200 - 240HB	help_outline Possible use	16 ft/min

K3

K3 - Ductile iron (GGG) (iron-carbon castings with a nodular graphite microsturcture)

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	Suitability	v_c
K3.1 - Ductile (nodular/spheriodal) iron, ferritic with a hardness of < 180HB	help_outline Primary use	23 ft/min
K3.2 - Ductile (nodular/spheriodal) iron, ferritic or pearlitic with a hardness of 180 - 220HB	help_outline Primary use	16 ft/min
K3.3 - Ductile (nodular/spheriodal) iron, pearlitic with a hardness of 220 - 260HB	help_outline Possible use	13 ft/min

K5

K5 - Compacted graphite iron (CGI) (iron-carbon castings with a vermicular graphite structure)

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	Suitability	v_c
K5.1 - Vermicular, compacted graphite iron with a hardness of < 180HB	help_outline Primary use	23 ft/min
K5.2 - Vermicular, compacted graphite iron with a hardness of 180 - 220HB	help_outline Primary use	16 ft/min
K5.3 - Vermicular, compacted graphite iron with a hardness of 220 - 260HB	help_outline Possible use	13 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
N1.1 - Pure aluminium and wrought aluminium alloys with a hardness of < 60HB	help_outline Possible use	52 ft/min
N1.2 - Wrought aluminium alloys with a hardness of 60 - 100HB	help_outline Possible use	39 ft/min
N1.3 - Wrought aluminium alloys with a hardness of 100 - 150HB	help_outline Possible use	26 ft/min

N2

N2 - Cast aluminium

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	Suitability	v_c
N2.1 - Cast aluminium alloys with a hardness of < 75HB	help_outline Possible use	26 ft/min
N2.2 - Cast aluminium alloys with a hardness of 75 - 90HB	help_outline Possible use	23 ft/min
N2.3 - Cast aluminium alloys with a hardness of 90 < 140HB	help_outline Possible use	16 ft/min

N3

N3 - Copper or copper alloys

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	Suitability	v_c
N3.1 - Free-cutting copper-alloys materials with excellent machining properties	help_outline Primary use	26 ft/min
N3.2 - Short-chip copper-alloys with good to moderate machining properties	help_outline Possible use	16 ft/min
N3.3 - Electrolytic copper and long-chip copper-alloys with moderate to poor machining properties	help_outline Possible use	10 ft/min

N4

N4 - Polymers(synthetic or semi-synthetic materials)

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	Suitability	v_c
N4.1 - Thermoplastic polymers	help_outline Possible use	26 ft/min
N4.2 - Thermosetting polymers	help_outline Possible use	10 ft/min
N4.3 - Reinforced polymers or composites	help_outline Possible use	10 ft/min