Sect 13-Clearance Hole Diameters

131Page of

TABLE OF CONTENTS

SINGLE HOLE DIAMETER

PAGE NO.CONTENTS

3

SECTION 13CLEARANCE HOLE DIAMETERS

4

5

2 HOLES IN LINE, COORDINATE TOLERANCING

SIMPLE HOLE PATTERNS, COORDINATE TOLERANCING

COMPLEX HOLE PATTERNS, COORDINATE TOLERANCING

2

TRUE POSITION TOLERANCING,

CLEARANCE HOLES, FLAT HEAD SCREWS

CLEARANCE HOLE DIAMETERS

TRUE POSITION TOLERANCING

CLEARANCE HOLE DIAMETER FORMULAS

SHOP STANDARD HOLE SIZES

FLAT WASHER REQUIREMENTS

TRUE POSITION TOLERANCING,

ALL PATTERNS, ALL PARTS CLEAR

ALL PATTERNS, ONE PART THREADED, OTHER PARTS CLEAR

SINGLE AND MULTIPLE HOLE APPLICATIONS

COORDINATE TOLERANCING FOR FLAT HEAD SCREWS

FLAT HEAD SCREWS ONLY. ALL PATTERNS.

FOR HARDWARE EXCEPT FLAT HEAD SCREWS

6

7

8

9

10

11

12

13

132Page of


HOLE

DIA

SCREW

SIZE

.099

.093.086

(#2)

.113

.119

.112

(#4)

.141

.147

.138

(#6)

.170

.176

.164

(#8)

.193

.199

.190

(#10)

.253

.262

.250

(1/4)

.319

.328

.3125

(5/16)

.382

.391

.375

(3/8)

.449

.458

.4375

(7/16)

.511

.526

.500

(1/2)

.636

.651

.625

(5/8)

.761

.776

.750

(3/4)

SINGLE HOLE DIAMETER

1. This table shows clearance hole

diameters for standard screws and bolts.

These holes are to be selected for

"single hole" applications.

2. See page 12 for Flat Washer

requirements.

133Page of


SCREW

SIZE

.123

.117.086

.144

.150.112

.138

.164

.190

.250

.3125

.375

.4375

.500

.625

.750

.176

.170

.204

.198

.231

.225

.295

.286

.353

.344

.418

.409

.489

.480

.557

.542

.682

.667

.,807

.792 .776

.791

.651

.666

.526

.541

.465

.474

.400

.409

.335

.344

.273

.282

.210

.216

.186

.192

.158

.164

.139

.133

.107

.113 .113

.107

.133

.139

.160

.154

.188

.182

.212

.206

.277

.268

.344

.335

.402

.393

.474

.465

.541

.526

.666

.651

.791

.776

.107

.101

.122

.128

.157

.151

.180

.174

.209

.203

.271

.262

.333

.324

.396

.387

.458

.449

.526

.511

.651

.636

.776

.761

.099

.093

.117

.123

.150

.144

.176

.170

.204

.198

.266

.257

.328

.319

.391

.382

.458

.449

.526

.511

.651

.636

.776

.761

.152

.146

.174

.180

.204

.198

.231

.225

.262

.253

.321

.312

.382

.373

.458

.449

.526

.511

.588

.573

.713

.698

.838

.823

.132

.126

.154

.160

.185

.179

.212

.206

.237

.231

.302

.293

.363

.354

.427

.418

.489

.480

.557

.542

.682

.667

.807

.792

.128

.122

.144

.150

.176

.170

.204

.198

.231

.225

.295

.286

.363

.354

.418

.409

.489

.480

.557

.542

.682

.667

.807

.792

.113

.107

.133

.139

.164

.158

.192

.186

.216

.210

.282

.273

.344

.335

.409

.400

.474

.465

.541

.526

.666

.651

.791

.776 .761

.776

.636

.651

.511

.526

.449

.458

.387

.396

.324

.333

.262

.271

.203

.209

.174

.180

.151

.157

.128

.122

.101

.107


HOLE LOCATION TOLERANCES (ALL PARTS).005.010.016.020.030 .005.010.016.020.030

OTHER PART(S) CLEAR

1 PART THREADED

OTHER PART(S) CLEAR

2 HOLES IN LINE

COORDINATE TOLERANCING

1. Do not use this chart for Flat Head

screws.

2. See page 12 for Flat Washer

requirements.

134Page of


SCREW

SIZE

.086

.112

.138

.164

.190

.250

.3125

.375

.4375

.500

.625

.750.792

.807

.667

.682

.542

.557

.480

.489

.409

.418

.344

.353

.286

.295

.218

.224

.193

.199

.170

.176

.147

.141

.117

.123 .119

.113

.138

.144

.169

.163

.194

.188

.222

.216

.282

.273

.349

.340

.409

.400

.474

.465

.541

.526

.666

.651

.791

.776

.107

.101

.126

.132

.160

.154

.185

.179

.212

.206

.277

.268

.337

.328

.402

.393

.474

.465

.099

.093

.122

.128

.152

.146

.180

.174

.204

.198

.266

.257

.333

.324

.391

.382

.458

.449

.526

.511

.651

.636

.776

.761

.198

.204

.231

.225

.262

.253

.286

.277

.344

.335

.409

.400

.474

.465

.541

.526

.604

.589

.729

.714

.854

.839

.150

.144

.170

.176

.204

.198

.231

.225

.262

.253

.318

.309

.382

.373

.443

.434

.510

.495

.573

.558

.698

.683

.823

.808

.139

.133

.158

.164

.192

.186

.216

.210

.241

.235

.307

.298

.373

.364

.443

.434

.510

.495

.573

.698

.683

.823

.808



OTHER PART(S) CLEAR

1 PART THREADED

ALL PARTS CLEAR

SIMPLE HOLE PATTERNS


1. Do not use for 3 or more holes in line.

2. See page 12 for Flat Washer requirements.

.667

.682

.542

.557

.480

.489

.418

.427

.356

.365

.293

.302

.235

.241

.206

.212

.182

.188

.154

.160

.139

.133

.792

.807

.776

.791

.651

.666

.526

.541

.558

.123

.117

.141

.147

.176

.170

.199

.193

.224

.218

.295

.286

.353

.344

.418

.409

.489

.480

.557

.542

.682

.667

.807

.792

.541

.526

.666

.651

.791

.776

.465

.474

.393

.402

.328

.337

.268

.277

.206

.212

.179

.185

.154

.160

.132

.126

.101

.107

135Page of


SCREW

SIZE

.086

.112

.138

.164

.190

.250

.3125

.375

.4375

.500

.625

.750

.635

.620

.698

.683

.823

.808

.948

.933

.510

.495

.573

.558

.635

.620

.760

.745

.885

.870

.206

.212

.237

.231

.266

.257

.295

.286

.353

.344

.418

.409

.489

.480

.557

.542

.620

.745

.730

.870

.855



OTHER PART(S) CLEAR

1 PART THREADED

ALL PARTS CLEAR

COMPLEX HOLE PATERNS



.180

.174

.605

.839

.854

.714

.729

.589

.604

.526

.541

.465

.474

.400

.409

.335

.344

.277

.286

.253

.262

.225

.231

.204

.198

.808

.823

.683

.698

.558

.573

.495

.510

.434

.443

.373

.382

.309

.318

.253

.262

.225

.231

.198

.204

.176

.170

.144

.150

.558

.808

.823

.683

.698

.573

.495

.510

.434

.443

.364

.373

.298

.307

.235

.241

.210

.216

.186

.192

.164

.158

.133

.139

.792

.807

.667

.682

.542

.557

.480

.489

.409

.418

.344

.353

.286

.295

.218

.224

.193

.199

.170

.176

.147

.141

.117

.123 .107

.101

.126

.132

.160

.154

.185

.179

.212

.206

.277

.268

.337

.328

.402

.393

.474

.465

.776

.791

.651

.666

.526

.541

.364

.373

.434

.443

.495

.510

.558

.573

.434

.443

.364

.373

.309

.318

.277

.286

.253

.262

.150

.144

.170

.176

.204

.198

.231

.225

.262

.253

.318

.309

.382

.373

.443

.434

.510

.495

.573

.558

.698

.683

.823

.808

.123

.117

.141

.147

.176

.170

.199

.193

.224

.218

.295

.286

.353

.344

.418

.409

.489

.480

.557

.542

.682

.667

.807

.792

136Page of


SCREW

SIZE

.086

.112

.138

.164

.190

.250

.3125

.375

.4375

.500

.625

.750

.465

.541

.526

.666

.651

.791

.776

.133

.139

.160

.154

.185

.179

.212

.206

.277

.268

.337

.328

.402

.393


TRUE POSITION DIAMETER

.030.035.040.045.050 .005.010.015.020.025


ALL PATTERNS - ALL PARTS CLEAR


.144

.138

.243

.249

.216

.222

.188

.194

.169

.163

.418

.427

.354

.363

.293

.302

.231

.237

.206

,212

.179

.185

.160

.154

.126

.132

.418

.427

.354

.363

.286

.295

.225

.231

.203

.209

.174

.180

.157

.151

.122

.128

.193

.199

,216

.222

.277

.286

.340

.349

.400

.409

.335

.344

.273

.282

.210

.216

.186

.192

.158

.164

.107

.101

.122

.128

.157

.151

.180

.174

.209

.203

.271

.262

.333

.324

.396

.387

.458

.449

.526

.511

.651

.636

.776

.761

.099

.093

.117

.123

.150

.144

.176

.170

.204

.198

.266

.257

.328

.319

.391

.382

.139

.133

.158

.164

.192

.186

.216

.210

.241

.235

.307

.298

.373

.364

.443

.434

.510

.495

.573

.698

.683

.823

.808

.558.558

.808

.823

.683

.698

.573

.495

.510

.434

.443

.364

.373

.309

.318

.792

.807

.667

.682

.542

.557

.480

.489

.792

.807

.667

.682

.542

.557

.480

.489

.792

.807

.667

.682

.542

.557

.480

.489

.409

.418

.344

.353

.286

.295

.225

.231

.198

.204

.170

.176

.150

.144

.117

.123

.163

.169

.144

.138

.113

.119

.139

.133

.107

.113

.474

.101

.107

.474

.409

.400

.776

.791

.651

.666

.526

.541

.465 .465

.541

.526

.666

.651

.791

.776

.474

.761

.776

.636

.651

.511

.526

.449

.458

137Page of


SCREW

SIZE

.086

.112

.138

.164

.190

.250

.3125

.375

.4375

.500

.625

.750

.144

.150

.176

.170

.204

.198

.231

.225

.295

.286

.353

.344

.418

.409



.030.035.040.045.050 .005.010.015.020.025


ALL PATTERNS


.293

.302

,268

.277

.239

.245

.465

.474

.393

.402

.335

.344

.273

.282

.246

.255

.218

.224

.199

.193

.170

.176

.449

.458

.387

.396

.324

.333

.262

.271

.235

.241

.210

.216

.188

.182

.158

.164 .107

.101

.122

.128

.157

.151

.180

.174

.209

.203

.271

.262

.333

.324

.396

.387

.458

.449

.526

.511

.651

.636

.776

.761

.203

.209

.237

.231

.266

.257

.295

.286

.349

.340.354

.363

.839

.854

.714

.729

.589

.604

.526

.541

.823

.838

.698

.713

.573

.588

.511

.526

.823

.838

.698

.713

.573

.588

.511

.526

.449

.458

.373

.382

.312

.321

.253

.262

.225

.231

.198

.204

.180

.174

.146

.152

.117

.123

.465

.541

.526

.666

.651

.791

.776

.400

.409

.474

.113

.107

.133

.139

.164

.158

.192

.186

.216

.210

.282

.273

.344

.335

.318

.309

.373

.364

.443

.434

.510

.495

.573

.698

.683

.823

.808

.558

.163

.169

.194

.188

.222

.216

.249

.243

.138

.144

.489

.480

.557

.542

.682

.667

.807

.792

.132

.126

.154

.160

.185

.179

,212

.206

.237

.231

.302

.293

.363

.354

.427

.418.465

.474

.409

.418

.605

.855

.870

.730

.745

.620

.542

.557

.480

.489

.418

.427

.557

.542

.620

.745

.730

.870

.855

.605

.792

.807

.667

.682

.542

.557

.480

.489

ONE PART THREADED, OTHER PART (S) CLEAR

138Page of


SCREW

SIZE

.086

.112

.138

.164

.190

.250

.3125

.375

CLEARANCE HOLES, FLAT HEAD SCREWS

.210

.216

.186

.192

.158

.164

.000

.067

.000

.060

.000

.046

.000

.042

.000

.030

.000

.030

.024

.000

.000

.024

.23

.24

.30

.29

.35

.34

.42

.40

.54

.52.273

.282

.78

.80

.65

.67

.400

.409

.335

.344

A

DIA

C

DIA

D

MIN

E F

MIN

.133

.139

.107

.113

.18

.19

.300

.248

.197

.147

.126

.104

.083

.060 .096

.124

.157

.171

.217

.269

.358

.417

1. This chart delineates the diameters to be applied when

designing countersunk holes for flat head screws.

A

C

82�2

DE

E

F

282�

C

A

Multiple Hole Application Single Hole Application

139Page of


SCREW

SIZE

.086

.112

.138

.164

.190

.250

.3125

.375


CLEARANCE HOLE LOCATION TOLERANCES

.005.010.016.020.030 .005.010.016.020.030

CLEARANCE HOLE DIAMETERS FOR FLAT HEAD SCREWS


.152

.146

.449

.458

.373

.382

.312

.321

.253

.262

.225

.231

.198

.204

.180

.174

.418

.427

.354

.363

.293

.302

.231

.237

.206

.212

.179

.185

.160

.154

.126

.132

.409

.418

.354

.363

.286

.295

.225

.231

.198

.204

.170

.176

.150

.144

.122

.128

.400

.409

.335

.344

.273

.282

.210

.216

.186

.192

.158

.164

.139

.133

.107

.113 .107

.101

.122

.128

.157

.151

.180

.174

.209

.203

.271

.262

.333

.324

.396

.387 .409

.418

.344

.353

.286

.295

.218

.224

.193

.199

.170

.176

.147

.141

.117

.123

.434

.443

.373

.382

.309

.318

.253

.262

.225

.231

.198

.204

.176

.170

.144

.150

.286

.277

.318

.309

.373

.364

.443

.434

.573

.558

.510

.495

.443

.434

.030 .020 .016 .010 .005

.480

.489

.409

.418

.344

.353

.286

.295

.257

.266

.231

.237

.495

.510

-

.465

.474

.400

.409

.335

.344

.277

.286

.253

.262

.225

.231

.204

.198

.434

.443

.373

.382

.309

.318

.253

.262

.225

.231

.198

.204

.176

.170

.144

.150

.434

.443

.364

.373

.298

.307

.235

.241

.210

.216

.186

.192

.164

.158

.133

.139

.409

.418

.344

.353

.286

.295

.218

.224

.193

.199

.170

.176

.147

.141

.117

.123 .107

.101

.126

.132

.160

.154

.185

.179

.212

.206

.277

.268

.337

.328

.402

.393

2 Holes in Line 2,3,4 Holes Rectangular All Patterns of 3 or More

Holes in LinePattern

1310Page of


FLAT HEAD SCREWS ONLY

ALL PATTERNS



SCREW

SIZE

.086

.112

.138

.164

.190

.250

.3125

.375

.144

.150

.176

.170

.204

.198

.231

.225

.295

.286

.353

.344

.418

.409



.030.035.040.045.050 .005.010.015.020.025

.293

.302

,268

.277

.239

.245

.465

.474

.393

.402

.335

.344

.273

.282

.246

.255

.218

.224

.199

.193

.170

.176

.449

.458

.387

.396

.324

.333

.262

.271

.235

.241

.210

.216

.188

.182

.158

.164 .107

.101

.122

.128

.157

.151

.180

.174

.209

.203

.271

.262

.333

.324

.396

.387

-

.237

.231

.266

.257

.295

.286

.349

.340.354

.363

.449

.458

.373

.382

.312

.321

.253

.262

.225

.231

.198

.204

.180

.174

.146

.152

.117

.123

.400

.409

.113

.107

.133

.139

.164

.158

.192

.186

.216

.210

.282

.273

.344

.335

.318

.309

.373

.364

.443

.434

.163

.169

.194

.188

.222

.216

.249

.243

.138

.144 .132

.126

.154

.160

.185

.179

,212

.206

.237

.231

.302

.293

.363

.354

.427

.418.465

.474

.409

.418

.480

.489

.418

.427

-

--

1311Page of


NON-LISTED TOLERANCES

CLEARANCE HOLE DIAMETER FORMULAS FOR HARDWARE

EXCEPT FLAT HEAD SCREWS

2 Holes in Line

All Parts Clear1 Part Threaded

Other Part(s) Clear

D1

D2

D3

DS

T1

2T

3T

= Min Hole Dia Part 1

= Min Hole Dia Part 2

= Min Hole Dia All Parts

= Dia of Screw or Stud = True Position Dia on Part 2

= True Position Dia on Part 1

= ± Tol on Part 2

= ± Tol on Part 1

4T

Simple Hole Pattern

Complex Hole Pattern

(3 or More Holes inLine)

True Position

All Patterns

D2= (T1 + T

2 ) + 2D

S - D1

D3= ( (

T1+ T

2

2+ S

D

2D = 1.414 ( 1

T +2

T ) + 2D

S - D1

3D = 0.707( 1

T +T2 ) + D

S

SD

+)2T+T

11.414(=D3

1D-S

D2+)T

2+T

1= 2.828(D2

DS+

2

4T+

3T

((=3D

1D-S

D2+)4

T+3

T(=2D

SD

+)2T+

1T(=

2D

SD

+)T2

+T1(= 1.414D

2

2D = 2.828( 1

T +2

T ) + DS

D2= (T3 + T

4 ) + DS

*

*

*

*

1. These formulas are used to calculate theoretical minimum

hole diameters for mating parts with coordinate tolerancing

not listed on pages 2,3, and 4 or with unequal tolerances,

or existing holes in one part.

2. To use these formulas, you must know the diameter of

3. See page 13 for converting the theoretical minimum hole

diameter to shop standard hole size.

D1

1312Page of


FLAT WASHER REQUIREMENTS

.086

.112

.138

.164

.190

.250

.3125

.375

.4375

.500

.625

.750 -

.530

.438

.347

.259

.221

.184

.145

.108 .106

.134

.164

.196

.225

.317

.390

.463

.535

.607

.753

.899

.098

.131

.165

.199

.232

.293

.370

.447

.524

.601

.756

.911

.147

.183

.224

.234

.275

.393

.454

.546

.631

.732

.911

1.035

SIZE

SCREW

Pan

Head

Screw Washer

Lock

Screw

Head

SocketNote 2

Note 1

-

-

-

MAXIMUM HOLE DIAMETER

1. This table should be used as a guide to determine when

a flat washer must be used due to excessively large hole

diameters as depicted in notes 2 and 3.

2. Flat washer must be used under pan head screw, lockwasher, socket head screw when maximum hole diameter

exceeds value shown in table.

3. Special large outside diameter washer required whenmaximum hole diameter exceeds value shown in this column.

1313Page of




.107

.113

.101

.107

.093

.099

.113

.119

.122

.128

.117

.123

.132

.126 ,154

.160

.152

.146

.157

.151

.150

.144

.139

.133

.144

.138

.147

.141

.186

.192

.185

.179

.188

.182

.180

.174

.164

.158

.169

.163

.176

.170

.216

.222

.212

.206

.216

.210

.209

.203

.194

.188

.199

.193

.204

.198

.246

.255

.245

.239

.249

.243

.241

.235

.224

.218

.231

.225

.237

.231

.286

.295

.282

.273

.286

.277

.277

.268

.262

.253

.266

.257

.271

.262

.328

.337

.328

.319

.333

.324

.321

.312

.302

.293

.307

.298

.318

.309

.373

.382

.365

.356

.373

.364

.363

.354

.344

.335

.349

.340

.353

.344

.434

.443

.418

.409

.427

.418

.409

.400

.391

.382

.396

.387

.402

.393

.542

.557

.526

.511

.541

.526

.510

.495

.458

.449

.474

.465

.489

.480

.651

.666

.635

.620

.651

.636

.620

.605

.573

.558

.588

.573

.604

.589 .689

.713

.683

.698

.667

.682

.714

.729

.745

.760

.730

.745

.776

.761

.808

.823

.792

.807

.776

.791

.823

.838

.855

.870

.839

.854

.885

.870

.917

.932

.901

.916

.886

.901

.933

.948

.964

.979

.948

.963

.994

.979

1. After determining the theoretical minimum hole diameter

from the formulas listed on page 11, select the shopstandard clearance hole values from this chart, whose

minimum is equal to or nearest above the theoretical minimum hole diameter.

Sect 13-Clearance Hole Diameters

Documents

Transcript of Sect 13-Clearance Hole Diameters