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              Hex and Hex Washer Head                               ANSI/ASME B18.6.3

 

Nominal Size

Width Across Flats

Width Across Corners

Height of Head

Diameter of Washer

Width of Slot

Depth of Slot

Max

Min

Min

Max

Min

Max

Min

Max

Min

Max

Min

2

.125

.120

.134

.050

.040

.166

.154

-

-

-

-

 

4

.188

.181

.202

.060

.049

.243

.225

.039

.031

.042

.025

 

5

.188

.181

.202

.070

.058

.260

.240

.043

.035

.049

.030

 

6

.250

.244

.272

.093

.080

.328

.302

.048

.039

.053

.033

 

8

.250

.244

.272

.110

.096

.348

.322

.054

.045

.074

.052

 

10

.312

.305

.340

.120

.105

.414

.384

.060

.050

.080

.057

 

12

.312

.305

.340

.155

.139

.432

.398

.067

.056

.103

.077

 

1/4

.375

.367

.409

.190

.172

.520

.480

.075

.064

.111

.083

 

5/16

.500

.489

.545

.230

.208

.676

.624

.084

.072

.134

.100

 

3/8

.562

.551

.614

.295

.270

.780

.720

.094

.081

.168

.131

 

1/2

.750

.735

.820

.400

.367

1.040

.960

-

-

-

-