Machinery's Handbook Pocket Companion

CAP SCREWS

Table 3: American National Standard Hexagon and Spline Socket Head Cap Screws 1960 Series ANSI/ASME B18.3-1986

Nominal Size

Body Diameter,

Head Diameter,

Head Height,

Spline Socket Size

Hex. Socket Size

Fillet Ext.

Key Engagement [a]

Max

Min

Max

Min

Max

Min

Nom

Nom

Max

D

A

H

M

J

F

T

0

0.0600

0.0568

0.096

0.091

0.060

0.057

0.060

0.050

0.007

0.025

1

0.0730

0.0695

0.118

0.112

0.073

0.070

0.072

0.062

0.007

0.031

2

0.0860

0.0822

0.140

0.134

0.086

0.083

0.096

0.078

0.008

0.038

3

0.0990

0.0949

0.161

0.154

0.099

0.095

0.096

0.078

0.008

0.044

4

0.1120

0.1075

0.183

0.176

0.112

0.108

0.111

0.094

0.009

0.051

5

0.1250

0.1202

0.205

0.198

0.125

0.121

0.111

0.094

0.010

0.057

6

0.1380

0.1329

0.226

0.218

0.138

0.134

0.133

0.109

0.010

0.064

8

0.1640

0.1585

0.270

0.262

0.164

0.159

0.168

0.141

0.012

0.077

10

0.1900

0.1840

0.312

0.303

0.190

0.185

0.183

0.156

0.014

0.090

0.2500

0.2435

0.375

0.365

0.250

0.244

0.216

0.188

0.014

0.120

0.3125

0.3053

0.469

0.457

0.312

0.306

0.291

0.250

0.017

0.151

?

0.3750

0.3678

0.562

0.550

0.375

0.368

0.372

0.312

0.020

0.182

0.4375

0.4294

0.656

0.642

0.438

0.430

0.454

?

0.375

0.023

0.213

0.5000

0.4919

0.750

0.735

0.500

0.492

0.454

?

0.375

0.026

0.245

?

0.6250

0.6163

0.938

0.921

0.625

0.616

0.595

0.500

0.032

0.307

0.7500

0.7406

1.125

1.107

0.750

0.740

0.620

?

0.625

0.039

0.370

?

0.8750

0.8647

1.312

1.293

0.875

0.864

0.698

0.750

0.044

0.432

1

1.0000

0.9886

1.500

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