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                                  Pan Heads                               ANSI/ASME B18.6.3 1972

Nomial size

Head Dimensions

Slot Dimensions

Recess Dimensions

Driver size

Diameter

Height

Width

Depth

Diameter

Depth

Width

Max

Min

Ref

Max

Min

Max

Min

Max

Min

Max

Min

Min

 

0

.116

.104

.035

.023

.016

.022

.014

.067

.054

.039

.021

.013

0

2

.167

.155

.049

.031

.023

.031

.022

.104

.091

.059

.041

.017

1

3

.193

.180

.056

.035

.027

.036

.026

.112

.099

.068

.050

.019

1

4

.219

.205

.063

.039

.031

.040

.030

.122

.109

.078

.060

.019

1

5

.245

.231

.070

.043

.035

.045

.034

.158

.145

.083

.057

.028

2

6

.270

.256

.077

.048

.039

.050

.037

.166

.153

.091

.066

.028

2

8

.322

.306

.091

.054

.045

.058

.045

.182

.169

.108

.082

.030

2

10

.373

.357

.105

.060

.050

.068

.053

.199

.186

.124

.100

.031

2

12

.425

.407

.119

.067

.056

.077

.061

.259

.246

.141

.115

.034

3

1/4

.492

.473

.137

.075

.064

.087

.070

.281

.268

.161

.135

.036

3

5/16

.615

.594

.170

.084

.072

.106

.085

.350

.337

.193

.169

.059

4

3/8

.740

.716

.204

.094

.081

.124

.100

.389

.376

.233

.210

.065

4