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ASME B18.21.1 Heavy Helical Spring Lock Washers-NINGBO BOLT

 

ASME B18.21.1 Regular Helical Spring Lock Washers

           

ASME B18.21.1 Heavy Helical Spring Lock Washers

Dimensions of ASME B18.21.1 Heavy Helical Spring Lock Washers

Nominal Thread diameter

Inside Diameter

Outside Diameter

Mean Section               Thicknes (ti + to)/2

Section Width

Bearing Width

 
 

Nominal Size

A

B

T

W

BW

 

Size

Max

Min

Max

Min

Min

Min

 

No.2 (0.086)

0.094

0.088

0.182

0.025

0.040

0.028

 

No.3 (0.099)

0.107

0.101

0.209

0.031

0.047

0.033

 

No.4  (0.112)

0.120

0.114

0.223

0.031

0.047

0.033

 

No.5 (0.125)

0.133

0.127

0.252

0.040

0.055

0.038

 

No.6 (0.138)

0.148

0.141

0.266

0.040

0.055

0.038

 

No.8 (0.164)

0.174

0.167

0.307

0.047

0.062

0.043

 

No.10 (0.190)

0.200

0.193

0.350

0.056

0.070

0.049

 

No.12 (0.216)

0.227

0.220

0.391

0.063

0.077

0.054

 

1/4 (0.250)

0.260

0.252

0.489

0.077

0.110

0.077

 

5/16 (0.3125)

0.322

0.314

0.593

0.097

0.130

0.091

 

3/8 (0.375)

0.385

0.377

0.688

0.115

0.145

0.101

 

7/16 (0.4375)

0.450

0.440

0.784

0.133

0.160

0.112

 

1/2 (0.500)

0.512

0.502

0.879

0.151

0.176

0.123

 

9/16 (0.5625)

0.574

0.564

0.975

0.170

0.193

0.135

 

5/8 (0.625)

0.641

0.628

1.087

0.189

0.210

0.147

 

11/16 (0.6875)

0.704

0.691

1.186

0.207

0.227

0.159

 

3/4 (0.750)

0.766

0.753

1.285

0.226

0.244

0.171

 

13/16 (0.8125)

0.832

0.816

1.387

0.246

0.262

0.183

 

7/8 (0.875)

0.894

0.878

1.489

0.266

0.281

0.197

 

15/16 (0.9375)

0.958

0.941

1.590

0.284

0.298

0.209

 

1 (1.000)

1.024

1.003

1.700

0.306

0.319

0.223

 

1 1/16 (1.0625)

1.087

1.066

1.803

0.326

0.338

0.237

 

1 1/8 (1.125)

1.153

1.129

1.903

0.345

0.356

0.249

 

1 3/16 (1.1875)

1.217

1.192

2.001

0.364

0.373

0.261

 

1 1/4 (1.250)

1.280

1.254

2.104

0.384

0.393

0.275

 

1 5/16 (1.3125)

1.344

1.317

2.203

0.403

0.410

0.287

 

1 3/8 (1.375)

1.408

1.379

2.301

0.422

0.427

0.299

 

1 7/16 (1.4375)

1.472

1.442

2.396

0.440

0.442

0.309

 

1 1/2 (1.500)

1.534

1.504

2.491

0.458

0.458

0.321

 

1 5/8 (1.625)

1.663

1.633

2.694

0.458

0.491

0.344

 

1 3/4 (1.750)

1.789

1.758

2.820

0.458

0.491

0.344

 

1 7/8 (1.875)

1.914

1.883

2.945

0.458

0.491

0.344

 

2 (2.000)

2.039

2.008

3.144

0.496

0.526

0.368

 

2 1/4 (2.250)

2.293

2.262

3.398

0.496

0.526

0.368

 

2 1/2 (2.500)

2.543

2.512

3.648

0.496

0.526

0.368

 

2 3/4 (2.750)

2.793

2.762

3.910

0.526

0.532

0.372

 

3 (3.000)

3.043

3.012

4.160

0.526

0.532

0.372

 

 

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