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2H Heavy Hex Nut, Plated

ASTM A194 Grade 2H heavy hex nuts are intended for use in flange bolting applications, as well as structural applications and with other high strength bolting. ASTM A194 covers carbon steel, alloy steel, and stainless steel nuts for bolts in high pressure or high temperature service. Grade markings consists of both the grade symbol "2H" and the manufacturer's identification mark. They are a common high strength nut used with many different bolting grades, including A193 Grade B7 studs. Dimensional specifications are governed by ASME B18.2.2. Heavy hex nuts provide increased bearing surface area over finished nuts such as J995 Grade 5 nuts. Available in plated finish. Plating sacrifices itself, corroding before the base material, offering added corrosion resistance.

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Governing Standards
Mechanical Properties
Chemical Properties
Dimensional Specifications

Dimensional Specifications

Dimensional SpecificationsGrade 2H

Per ASME B18.2.2-2015
Nominal Diameter		UNC	UNF	UN8	F			G		H
					Width Across Flats			Width Across Corners		Thickness
					Basic	Max	Min	Max	Min	Basic	Max	Min
1/4	0.250	20	28		1/2	0.500	0.488	0.577	0.556	15/64	0.250	0.218
5/16	0.313	18	24		9/16	0.562	0.546	0.650	0.220	19/64	0.314	0.280
3/8	0.375	16	24		11/16	0.688	0.669	0.794	0.763	23/64	0.377	0.341
7/16	0.438	14	20		3/4	0.750	0.728	0.866	0.830	27/64	0.441	0.403
1/2	0.500	13	20		7/8	0.875	0.850	1.010	0.990	31/64	0.504	0.464
9/16	0.563	12	18		15/16	0.938	0.909	1.083	1.037	35/64	0.568	0.526
5/8	0.625	11	18		1 1/16	1.062	1.031	1.227	1.175	39/64	0.631	0.587
3/4	0.750	10	16		1 1/4	1.250	1.212	1.443	1.382	47/64	0.758	0.710
7/8	0.875	9	14		1 7/16	1.438	1.394	1.660	1.589	55/64	0.885	0.833
1	1.000	8	14		1 5/8	1.625	1.575	1.876	1.796	63/64	1.012	0.956
1 1/8	1.125	7	12	8	1 13/16	1.812	1.756	2.093	2.002	1 7/64	1.139	1.079
1 1/4	1.250	7	12	8	2	2.000	1.380	2.309	2.209	1 7/32	1.251	1.187
1 3/8	1.375	6	12	8	2 3/16	2.188	2.119	2.526	2.416	1 11/32	1.378	1.310
1 1/2	1.500	6	12	8	2 3/8	2.375	2.300	2.742	2.622	1 15/32	1.505	1.433
1 5/8	1.625	5 1/2	12	8	2 9/16	2.562	2.481	2.959	2.828	1 19/32	1.632	1.556
1 3/4	1.750	5	12	8	2 3/4	2.750	2.662	3.175	3.035	1 23/32	1.759	1.679
1 7/8	1.875	5	12	8	2 15/16	2.938	2.844	3.392	3.242	1 27/32	1.886	1.802
2	2.000	4 1/2	12	8	3 1/8	3.125	3.025	3.608	3.449	1 31/32	2.013	1.925
2 1/4	2.250	4 1/2	12	8	3 1/2	3.500	3.388	4.041	3.862	2 13/64	2.251	2.155
2 1/2	2.500	4	12	8	3 7/8	3.875	3.750	4.474	4.275	2 29/64	2.505	2.401
2 3/4	2.750	4	12	8	4 1/4	4.250	4.112	4.907	4.688	2 45/64	2.759	2.647
3	3.000	4	12	8	4 5/8	4.625	4.475	5.340	5.102	2 61/64	3.013	2.893
3 1/4	3.250	4	12	8	5	5.000	4.838	5.774	5.515	3 3/16	3.252	3.124
3 1/2	3.500	4	12	8	5 3/8	5.375	5.200	6.207	5.928	3 7/16	3.506	3.370
3 3/4	3.750	4	12	8	5 3/4	5.750	5.562	5.562	6.341	3 11/16	3.670	3.616
4	4.000	4	12	8	6 1/8	6.125	5.925	5.925	6.755	3 15/16	4.014	3.862

All dimensions are in inches.

2H Heavy Hex Nut, Plated

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Diameter Thread Pitch Width Across Flats Height of Nut Item # Availability Price Quantity UOM

1/4

1/2

0.2500

N2HP0250000Y-I

In Stock

$0.20747/EA

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1/4-20 2H HEAVY HEX NUT, PLATED

$0.20747/EA

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Quantity	Price
Quantity	Price
1	$0.20747/EA
870	$0.19824/EA
3450	$0.17595/EA
15520	$0.13632/EA

5/16

9/16

0.3140

N2HP0310000Y-I

3-5 Working Days

$0.46104/EA

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5/16-18 2H HEAVY HEX NUT, PLATED

$0.46104/EA

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3-5 Working Days

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Quantity	Price
Quantity	Price
1	$0.46104/EA
590	$0.44053/EA
2330	$0.39101/EA
10470	$0.30294/EA

1/2

7/8

0.4844

N2HP0500000Y-I

In Stock

$0.22683/EA

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1/2-13 A194 2H HEAVY HEX NUT, PLATED

$0.22683/EA

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Quantity	Price
Quantity	Price
1	$0.22683/EA
160	$0.21674/EA
620	$0.19238/EA
2760	$0.14905/EA

5/8

1 1/16

0.6094

N2HP0620000Y-I

In Stock

$0.42019/EA

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5/8-11 A194 2H HEAVY HEX NUT, PLATED

$0.42019/EA

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In Stock

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Quantity	Price
Quantity	Price
1	$0.42019/EA
90	$0.4015/EA
340	$0.35636/EA
1520	$0.2761/EA

3/4

1 1/4

0.7344

N2HP0750000Y-I

In Stock

$1.0802/EA

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3/4-10 A194 2H HEAVY HEX NUT, PLATED

$1.0802/EA

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In Stock

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Quantity	Price
Quantity	Price
1	$1.0802/EA
60	$1.03214/EA
210	$0.91611/EA
940	$0.70977/EA

7/8

1 7/16

0.8594

N2HP0870000Y-I

In Stock

$2.19631/EA

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7/8-9 A194 2H HEAVY HEX NUT, PLATED

$2.19631/EA

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In Stock

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Quantity	Price
Quantity	Price
1	$2.19631/EA
40	$2.09859/EA
140	$1.86268/EA
610	$1.44314/EA

1 5/8

0.9844

N2HP1000000Y-I

In Stock

$1.20828/EA

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1-8 A194 2H HEAVY HEX NUT, PLATED

$1.20828/EA

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Quantity	Price
Quantity	Price
1	$1.20828/EA
25	$1.15452/EA
100	$1.02473/EA
500	$0.79393/EA

1 1/8

1 13/16

1.8125

N2HP112NC00Y-I

In Stock

$4.84862/EA

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1 1/8-7 2H HEAVY HEX NUT, PLATED

$4.84862/EA

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In Stock

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Quantity	Price
Quantity	Price
1	$4.84862/EA
25	$4.63289/EA
70	$4.11208/EA
500	$3.1859/EA

1 1/8

1 13/16

1.1094

N2HP1120000Y-I

In Stock

$2.17865/EA

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1 1/8-8 A194 2H HEAVY HEX NUT, PLATED

$2.17865/EA

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In Stock

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Quantity	Price
Quantity	Price
1	$2.17865/EA
25	$2.08172/EA
70	$1.8477/EA
500	$1.43154/EA

1 1/4

N2HP125NC00Y-I

3-5 Working Days

$5.83218/EA

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1 1/4-7 2H HEAVY HEX NUT, PLATED

$5.83218/EA

Qty

3-5 Working Days

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Quantity	Price
Quantity	Price
1	$5.83218/EA
25	$5.57269/EA
60	$4.94624/EA
500	$3.83217/EA

1 1/4

1.2188

N2HP1250000Y-I

In Stock

$2.49474/EA

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1 1/4-8 A194 2H HEAVY HEX NUT, PLATED

$2.49474/EA

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In Stock

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Quantity	Price
Quantity	Price
1	$2.49474/EA
25	$2.38374/EA
60	$2.11578/EA
500	$1.63923/EA

1 3/8

2 3/8

N2HP1370000Y-I

In Stock

$2.87068/EA

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1 3/8-8 2H HEAVY HEX NUT, PLATED

$2.87068/EA

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In Stock

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Quantity	Price
Quantity	Price
1	$2.87068/EA
40	$2.74295/EA
80	$2.4346/EA
180	$1.88625/EA

ASTM A194	This specification covers a variety of carbon, alloy, and martensitic stainless steel nuts in the size range 1⁄4 through 4 in. and metric M6 through M100 nominal. It also covers austenitic stainless steel nuts in the size range 1⁄4 in. and M6 nominal and above. These nuts are intended for high-pressure or high temperature service, or both. Grade substitutions without the purchaser’s permission are not allowed.
ASME B18.2.2	Covers the complete general and dimensional data for the various types of inch series square and hex nuts, including machine screw nuts and coupling nuts.
ASME B1.1 UNC & UNF Class 2B	Specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads.

Carbon Steel, Quenched & Tempered		Per ASTM A194/A194M-16
Diameter	Proof Load Stress	Core Hardness		Tempering Temperature
	Min psi	Rockwell		Min
		Min	Max
1/4" thru 1 1/2"	175,000	C24	C35	850F
Over 1 1/2"	175,000		C35	850F

Per ASTM A194/A194M-16
Grade	Material	Carbon	Manganese	Phosphorus	Sulfur (1)	Silicon
Grade	Material	% by weight	% by weight	% by weight	% by weight	% by weight
2H	Carbon Steel	0.40 min	1.00 max	0.040 max	0.050 max	0.04 max

2H Heavy Hex Nut, Plated

Technical Data

Governing Standards

Governing StandardsGrade 2H

Mechanical Properties

Mechanical PropertiesGrade 2H

Chemical Properties

Chemical PropertiesGrade 2H

Dimensional Specifications

Dimensional SpecificationsGrade 2H

Diameter

Thread Pitch

Thread Type

Width Across Flats

1/4-20 2H HEAVY HEX NUT, PLATED

5/16-18 2H HEAVY HEX NUT, PLATED

1/2-13 A194 2H HEAVY HEX NUT, PLATED

5/8-11 A194 2H HEAVY HEX NUT, PLATED

3/4-10 A194 2H HEAVY HEX NUT, PLATED

7/8-9 A194 2H HEAVY HEX NUT, PLATED

1-8 A194 2H HEAVY HEX NUT, PLATED

1 1/8-7 2H HEAVY HEX NUT, PLATED

1 1/8-8 A194 2H HEAVY HEX NUT, PLATED

1 1/4-7 2H HEAVY HEX NUT, PLATED

1 1/4-8 A194 2H HEAVY HEX NUT, PLATED

1 3/8-8 2H HEAVY HEX NUT, PLATED