Types of Fasteners Standards Products

ASTM A194 Grade 8m Nuts

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Specification

CHEMICAL & MECHANICAL COMPOSITION

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heavy-hex-nuts

ASME SA 194 Gr. 8M Strain Hardened hex nuts, heavy hex nuts and square nuts manufacturer in India.

Detailed Information

Prashaant Steel & Alloys is used in the manufacture of Grade 8M Nuts in various industries that have found applications. At Prashaant Steel & Alloys, we manufacture ASTM A194 Grade 8M Nuts in a variety of sizes and dimensions that are suitable for the applications needed. The ASTM F468 Fasteners that we manufacture are made from our huge inventory using the highest quality of raw materials. ASTM F468 Fasteners are available in sizes ranging in thickness. At Prashaant Steel & Alloys, we aim to offer full customer satisfaction. Therefore, we also manufacture the Grade 8M Nuts in custom size orders that suit our clients’ specifications and requirements. Prashaant Steel & Alloys has a clientele of many companies from all over the world and caters to both large and small sectors. Prashaant Steel & Alloys houses all the machinery and technology required for the development of high caliber ASTM A194 Grade 8M Nuts at its state-of-the-art plant.   At Prashaant Steel & Alloys, the customer service team ensures that all customers are helped with all their needs and demands. Due to the high strength they give, the ASTM A194 Grade 8M Nuts from Prashaant Steel & Alloys are widely common.

The hardness of the ASTM A194 Grade 8M Washer and other fasteners is 223 BHN in Brinell hardness score. The size of the fasteners range from M02 to M160.  The length of the ASTM A194 Grade 8M Heavy Hex Nuts range from 3mm to 200mm and the dimensions are governed by DIN, ISO, JIS, GB and other international standards. The ASTM A194 Gr. 8M Strain Hardened Nut is harder. The material can be strained and hardened as the heat treatment method to achieve the maximum hardness. This grade of fasteners and the ASTM A194 gr 8m equivalent grades are used in the kitchen appliances, sinks, food processing machinery, milk processing units and in the beer brewing industrial applications.

ASTM A194 Grade 8m Class 2 Nuts are made up of a material composition of carbon, manganese, phosphorus, sulfur, silicon, 16% chromium, 10% nickel and 2% molybdenum. The A194 Gr 8m Material is therefore corrosion resistant and strong. The fasteners are strong with a minimum tensile strength of 550MPa and minimum yield strength of 240MPa.

Specification chart of Grade 8m Class 2 Nuts:

Standards

Designation

ASTM

A194 Grade 8M: Stainless AISI 316 Heavy Hex Nuts.

 

Dimensions

ASME B18.2.1, B18.3

Additional Requirements

NACE MR0103/ MR0175/ ISO 15156 Compliance

Certification

Dual Certified As per ASTM & ASME Codes

Threads Configuration

ASME B1.1 2A/ 3A Inch Unified Threads and B1.13M 6h Metric Coarse Threads

Additional Certifications

PED 97/ 23/ EC Certified, Merkblatt AD 2000 W2 Certified

Mandatory Requirements

Free from Mercury & Radioactive Contamination

A194 Grade 8M Heavy Hex Nuts Dimensional Table:

Nominal Size or Basic Major Thread Diameter

F

G

H

Width Across Flats

Width Across Corners

Thickness

Basic

Max

Min

Max

Min

Basic

Max

Min

1/4

.2500

1/2

.500

.488

.577

.556

15/64

.250

.218

5/16

.3125

9/16

.562

.546

.650

.622

19/64

.314

.280

3/8

.3750

11/16

.688

.669

.794

.763

23/64

.377

.341

7/16

.4375

3/4

.750

.728

.866

.830

27/64

.441

.403

1/2

.5000

7/8

.875

.850

1.010

.969

31/64

.504

.464

9/16

.5625

15/16

.938

.909

1.083

1.037

35/64

.568

.526

5/8

.6250

1-1/16

1.062

1.031

1.227

1.175

39/64

.631

.587

3/4

.7500

1-1/4

1.250

1.212

1.443

1.382

47/64

.758

.710

7/8

.8750

1-7/16

1.438

1.394

1.660

1.589

55/64

.885

.833

1

1.0000

1-5/8

1.325

1.575

1.876

1.796

63/64

1.012

.956

1-1/8

1.1250

1-13/16

1.812

1.756

2.093

2.002

1-7/64

1.139

1.079

1-1/4

1.2500

2

2.000

1.938

2.309

2.209

1-7/32

1.251

1.187

1-3/8

1.3750

2-3/16

2.188

2.119

2.526

2.416

1-11/32

1.378

1.460

1-1/2

1.5000

2-3/8

2.375

2.300

2.742

2.622

1-15/32

1.505

1.433

1-3/4

1.7500

2-3/4

2.750

2.662

3.175

3.035

1-23/32

1.759

1.679

2

2.0000

3-1/8

3.125

3.025

3.608

3.449

1-31/32

2.013

1.925

2-1/4

2.2500

3-1/2

3.500

3.388

4.041

3.862

2-13/64

2.251

2.155

2-3/4

2.7500

4-1/4

4.250

4.112

4.907

4.688

2-45/64

2.759

2.647

3

3.0000

4-5/8

4.625

4.475

5.340

5.102

2-61/64

3.013

2.893

3-1/2

3.5000

5-3/8

5.375

5.200

6.207

5.928

3-7/16

3.506

3.370

3-3/4

3.7500

5-3/4

5.750

5.562

6.640

6.341

3-11/16

3.670

3.616

4

4.0000

6-1/8

6.125

5.925

7.073

6.755

3-15/16

4.014

3.862

Chemical Element of SA 194 Gr 8M Nut:

Chemicals

Percentage %

C.

0.08M %

Mn.

2.00 %

Si.

1.00 %

P.

0.05 %.

S.

0.03 %

Cr.

18.0-20.0 %

Ni.

8.0-11.0

Mo.

ASTM A194 Grade 8M Washer Mechanical Properties Database:

Tensile Strength/Ultimate Tensile Stress (UTS) – (Mpa)

Yield Strength/Proof Stress(0.2% Offset) (YS) – (Mpa)

Elongation in 4D (El)

Reduction

Hardness – (BHN)

550

240

30

40

223

ASTM A194 Gr 8M Nut Sizes:

Nut Size

(mm)

Diameter*

(mm)

Height

(mm)

Hex Nut

Jam Nut

Nylock Nut

2

4

1.6

1.2

2.5

5

2

1.6

3

5.5

2.4

1.8

4

4

7

3.2

2.2

5

5

8

4

2.7

5

6

10

5

3.2

6

7

11

5.5

3.5

8

13

6.5

4

8

10

17

8

5

10

12

19

10

6

12

14

22

11

7

14

16

24

13

8

16

18

27

15

9

18.5

20

30

16

10

20

ASME SA194 Grade 8M Heavy Hex Nuts Dimensions:

Diameter (D)

Body Diameter (D)

Across the Flats (F)

Across the Corners ©

Head Height (H)

Thread Lengths (T)

MAX

MIN

MAX

MIN

MAX

MIN

MAX

MIN

< 6”

> 6”

1/2

0.515

0.482

0.875

0.85

1.01

0.969

0.364

0.302

1.25

1.5

5/8

0.642

0.605

1.062

1.031

1.227

1.175

0.444

0.378

1.5

1.75

3/4

0.768

0.729

1.25

1.212

1.443

1.383

0.524

0.455

1.75

2

7/8

0.895

0.852

1.438

1.394

1.66

1.589

0.604

0.531

2

2.25

1

1.022

0.976

1.625

1.575

1.876

1.796

0.7

0.591

2.25

2.5

1 1/8

1.149

1.098

1.812

1.756

2.093

2.002

0.78

0.658

2.5

2.75

1 1/4

1.277

1.223

2

1.938

2.309

2.209

0.876

0.749

2.75

3

1 3/8

1.404

1.345

2.188

2.119

2.526

2.416

0.94

0.81

3

3.25

1 1/2

1.531

1.47

2.375

2.3

2.742

2.622

1.036

0.902

3.25

3.5

1 3/4

1.785

1.716

2.75

2.662

3.175

3.035

1.196

1.054

3.75

4

2

2.039

1.964

3.125

3.025

3.608

3.449

1.388

1.175

4.25

4.5

2 1/4

2.305

2.214

3.5

3.388

4.041

3.862

1.548

1.327

4.75

5

2 1/2

2.559

2.461

3.875

3.75

4.474

4.275

1.708

1.479

5.25

5.5

2 3/4

2.827

2.711

4.25

4.112

4.907

4.688

1.869

1.632

5.75

6

3

3.081

2.961

4.625

4.475

5.34

5.102

2.06

1.815

6.25

6.5

A194 Grade 8M Nuts Applications:

  • Power Generation
  • Petrochemicals
  • Gas Processing
  • Pharmaceuticals
  • Sea Water Equipment

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