Location
23A Roland Avenue
Mt Laurel, NJ 08054
 

Hex Head Bolts; Grade 2 / 18/8 & 316 Stainless

 

HEX CAP SCREWS ASME B18.2.1-1996

Nominal

or
Basic

Product

Diameter

E

F

G

H

J

Lt

Y

Body Diameter

Width Across Flats

Width
Across
Corners

Head Height

Wrn.
Hgt.

Thread

Length

Trans

-ition
Thd
Lgt.

For

Scw

Lgt.

<6in.

For

Scw

Lgt.

>6in.

Max

Min

Basic

Max

Min

Max

Min

Basic

Max

Min

Min

Ref

Ref

Max

1/4

0.2500

0.2500

0.2450

7/16

0.438

0.428

0.505

0.488

5/32

0.163

0.150

0.106

0.750

1.000

0.250

5/16

0.3125

0.3125

0.3065

1/2

0.500

0.489

0.577

0.557

13/64

0.211

.0195

0.140

0.875

1.125

0.278

3/8

0.3750

0.3750

0.3690

9/16

0.562

0.551

0.650

0.628

15/64

0.243

0.226

0.160

1.000

1.250

0.312

7/16

0.4375

0.4375

0.4305

5/8

0.625

0.612

0.722

0.698

9/32

0.291

0.272

0.195

1.125

1.375

0.357

1/2

0.5000

0.5000

0.4930

3/4

0.750

0.736

0.866

0.840

5/16

0.323

0.302

0.215

1.250

1.500

0.385

9/16

0.5625

0.5625

0.5545

13/16

0.812

0.798

0.938

0.910

23/64

0.371

0.348

0.250

1.375

1.625

0.417

5/8

0.6250

0.6250

0.6170

15/16

0.938

0.922

1.083

1.051

25/64

0.403

0.378

0.269

1.500

1.750

0.455

3/4

0.7500

0.7500

0.7410

1-1/8

1.125

1.100

1.299

1.254

15/32

0.483

0.455

0.324

1.750

2.000

0.500

7/8

0.8750

0.8750

0.8660

1-5/16

1.312

1.285

1.516

1.465

35/64

0.563

0.531

0.378

2.000

2.250

0.556

1"

1.0000

1.0000

1.0000

1-1/2

1.500

1.469

1.732

1.675

39/64

0.627

0.591

0.416

2.250

2.500

0.625

1-1/8

1.1250

1.1250

1.1140

1-11/16

1.688

1.631

1.949

1.859

11/16

0.718

0.658

0.461

2.500

2.750

0.714

1-1/4

1.2500

1.2500

1.2390

1-7/8

1.875

1.812

2.165

2.066

25/32

0.813

0.749

0.530

2.750

3.000

0.714

1-1/2

1.5000

1.5000

1.4880

2-1/4

2.250

2.175

2.598

2.480

1-5/16

0.974

0.902

0.640

3.250

3.500

0.833

 

Tolerance on Length

Nominal
Screw Size

Nominal Screw Length

Up to 1 in.,
incl.

Over 1 in.

to
2-1/2 in., incl.

Over 2-1/2 in.
to 4 in., incl.

Over 4 in. to
6 in., incl.

Longer

than 6 in.

1/4 to 3/8

-0.03

-0.04

-0.06

-0.10

-0.18

7/16 and 1/2

-0.03

-0.06

-0.08

-0.10

-0.18

9/16 to 3/4

-0.03

-0.08

-0.10

-0.10

-0.18

7/8 and 1

....

-0.10

-0.14

-0.16

-0.20

1-1/8 to

1-1/2

....

-0.12

-0.16

-0.18

-0.22

‡Length of a cap screw is measured from the underhead bearing surface to the extreme end of the screw.

D = Nominal diameter of the screw in inches
*These properties are tested only on machined specimens when the testing machine cannot provide for full testing of the parts.
**Product standards require the manufacturer’s head marking to appear on the top of all cap screws 1/4” diameter and larger. “X” represents one location such a marking may appear.

Lag Bolts

 

 

HEX LAG SCREWS ASME B18.2.1-1996

Basic Product
Diameter

Threads
Per Inch

E

F

G

H

S

Body or
Shoulder
Diameter

Width Across Flats

Width Across
Corners

Head Height

Shoulder
Length

Max

Min

Basic

Max

Min

Max

Min

Basic

Max

Min

Min

# 10

0.1900

11

0.199

0.178

9/32

0.281

0.271

0.323

0.309

1/8

0.140

0.110

0.094

1/4

0.2500

10

0.260

0.237

7/16

0.438

0.425

0.505

0.484

11/64

0.188

0.150

0.094

5/16

0.3125

9

0.324

0.298

1/2

0.500

0.484

0.577

0.552

7/32

0.235

0.195

0.125

3/8

0.3750

7

0.388

0.360

9/16

0.562

0.544

0.650

0.620

1/4

0.268

0.226

0.125

7/16

0.4375

7

0.452

0.421

5/8

0.625

0.603

0.722

0.687

19/64

0.316

0.272

0.156

1/2

0.5000

6

0.515

0.482

3/4

0.750

0.725

0.866

0.826

11/32

0.364

0.302

0.156

5/8

0.6250

5

0.642

0.605

15/16

0.938

0.906

1.083

1.033

27/64

0.444

0.378

0.312

3/4

0.7500

4-1/2

0.768

0.729

1-1/8

1.125

1.088

1.299

1.240

1/2

0.524

0.455

0.375

7/8

0.8750

4

0.895

0.852

1-5/16

1.312

1.269

1.516

1.447

37/64

0.604

0.531

0.375

 

Tolerance on Length

Nominal Screw Size

Nominal Screw Length

Thru 6 in.

Over 6 in.

1/2 and smaller

±0.12

±0.25

Over 1/2

±0.25

±0.25

‡Length of a lag screw is measured from the underhead bearing surface to the extreme end of the screw.

 

Drive Screws Type U

Round Head

 

Nominal
Screw
Size

Number
Of Thread
Starts

D

A

H

P

Recommened
Hole Size

Outside
Diameter

Head
Diameter

Head
Height

Pilot
Diameter

Drill Size
No.

Hole
Diameter

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

00
0
2
4

6
6
8
7

0.060
0.075
0.100
0.116

0.057
0.072
0.097
0.112

0.099
0.127
0.162
0.211

0.090
0.118
0.146
0.193

0.034
0.049
0.069
0.086

0.026
0.041
0.059
0.075

0.049
0.063
0.083
0.096

0.046
0.060
0.080
0.092

55
51
44
37

0.052
0.067
0.086
0.104

6
7
8
10

7
8
8
8

0.140
0.154
0.167
0.182

0.136
0.150
0.162
0.177

0.260
0.285
0.309
0.359

0.240
0.264
0.287
0.334

0.103
0.111
0.120
0.137

0.091
0.099
0.107
0.123

0.116
0.126
0.136
0.150

0.112
0.122
0.132
0.146

31
29
27
20

0.120
0.136
0.144
0.161

12
14

8
9

0.212
0.242

0.206
0.236

0.408
0.457

0.382
0.429

0.153
0.170

0.139
0.155

0.177
0.202

0.173
0.198

11
2

0.191
0.221

 

 

L

Nominal
Screw Length

1/8

3/16

1/4

5/16

3/8

1/2

5/8

3/4

1 in. and
over

S

Pilot Length

0.047

0.047

0.047

0.047

0.062

0.062

0.078

0.078

0.125

 

Flat Head 100º
Machine Screws

SLOTTED

 

PHILLIPS

 

Nominal Size

A

H

J

T

M

G

N

Phillips
Driver Size

Head Diameter

Height of Head

Width of Slot

Depth of Slot

Dimensions of Recess

Diameter

Depth

Width

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

2
4
5
6
7*
8
9*
10
12
14*
1/4
5/16
3/8
1/2

.172
.225
.252
.279
.305
.332
.358
.385
.438
.491
.507
.635
.762
.875

147
.195
.220
.244
.268
.292
.316
.340
.389
.437
.452
.568
.685
775

.051
.067
.075
.083
.091
.100
.108
.116
.132
.148
.153
.191
.230
.223

.040
.055
.062
.069
.076
.084
.091
.098
.112
.127
.131
.165
.200
.198

.031
.039
.043
.048
.048
.054
.054
.060
.067
.075
.075
.084
.094
.106

.023
.031
.035
.039
.039
.045
.045
.050
.056
.064
.064
.072
.081
.091

.023
.030
.034
.038
.041
.045
.049
.053
.060
.068
.070
.088
.106
.103

.015
.020
.022
.024
.027
.029
.032
.034
.039
.044
.046
.058
.070
.065

.102
.128
.154
.174
.182
.189
.258
.204
.268
.283
.283
.365
.393
.424

.089
.115
.141
.161
.169
.176
.245
.191
.255
.270
.270
.352
.380
.411

.063
.089
.086
.106
.114
.121
.146
.136
.156
.171
.171
.216
.245
.276

.017
.018
.027
.029
.030
.031
.034
.032
.036
.039
.035
.061
.065
.069

1
1
2
2
2
2
2
2-3*
3
3
3
4
4
4

 

Head Dimensions

Square Drive Flat Head

This type of recess has a squam center opening slightly tapered side walls and a conical bottom.

Nominal Size or Basic Screw Diameter

M
Recess
Square

T
Recess
Depth

Drive
Size

F
Penetration
Gauging Depth

Max

Min.

Min.

Max.

 

Max.

Min.

3

0.0990

4

0.1120

5

0.1250

6

0.1380

7

0.1510

8

0.1640

10

0.1900

12

0.2160

1/4

0.2500

5/16

0.3125

3/8

0.3750

 

0.071
0.071
0.091
0.091
0.091
0.1126
0.1126
0.133
0.133
0.191
0.191

0.0696
0.0696
0.090
0.090
0.090
0.111
0.111
0.1315
0.1315
0.1895
0.1895

0.073
0.073
0.113
0.113
0.113
0.140
0.140
0.165
0.165
0.201
0.201

0.063
0.063
0.105
0.105
0.105
0.119
0.119
0.155
0.155
0.191
0.191

0
0
1
1
1
2
2
3
3
4
4

0.038
0.038
0.065
0.065
0.065
0.075
0.075
0.095
0.095
0.100
0.100

0.032
0.032
0.057
0.057
0.057
0.065
0.065
0.085
0.085
0.090
0.090

 

Hex Head
Hex Washer Head

Machine Screws
Tapping Screws
Self Drilling Screws

SLOTTED

 

SLOTTED

 

Nominal
Size

A

W

H

F

U

J

T

Width
Across
Flats

Width
Across
Corners

Height
of
Head

Diameter
of
Washer

Thickness
of
Washer

Width
of
Slot

Depth
of
Slot

Max.

Min.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

4
6
7
8
10
12
14
1/4
5/16
3/8

.187
.250
.250
.250
.312
.312
.438
.375
.500
.562

.181
.244
.244
.244
.305
.305
.428
.367
.489
.551

.202
.272
.272
.272
.340
.340
.409
.409
.545
.614

.060
.093
.093
.110
.120
.155
.190
.190
.230
.295

.049
.080
.080
.096
.105
.139
.172
.172
.208
.270

.243
.328
.328
.348
.414
.432
.520
.520
.676
.780

.225
.302
.302
.322
.384
.398
.480
.480
.624
.720

.019
.025
.029
.031
.031
.039
.050
.050
.055
.063

.011
.015
.017
.019
.019
.022
.030
.030
.035
.037

.039
.048
.048
.054
.060
.067
.075
.075
.084
.094

.031
.039
.039
.045
.050
.056
.064
.064
.072
.081

.042
.053
.062
.074
.080
.103
.111
.111
.134
.168

.025
.033
.040
.052
.057
.077
.083
.083
100
.131

 

Oval Head
Machine Screws
Tapping Screws
Wood Screws*

SLOTTED

 

PHILLIPS

 

Nominal
Size

A

H

O

J

T

M

G

N

Phillips
Driver
Size

Head Diameter

Height of Head

Width of Slot

Depth of Slot

Dimensions of Recess

Side Height

Total Height

Diameter

Depth

Width

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

4
5*
6
8
9*
10
12
14*
1/4

.225
.252
.279
.332
.358
.385
.438
.491
.507

.195
.220
.244
.292
.316
.340
.389
.452
.452

.067
.075
.083
.100
.108
.116
.132
.148
.153

.054
.062
.069
.084
.091
.098
.112
.127
.131

.104
.116
.128
.152
.164
.176
.200
.224
.232

.084
.095
.105
.126
.137
.148
.169
.190
.197

.039
.043
.048
.054
.054
.060
.067
.075
.075

.031
.035
.039
.045
.045
.050
.056
.064
.064

.059
.067
.074
.088
.095
.103
.117
.132
.136

.049
.055
.060
.072
.078
.084
.096
.108
.112

.136
.158
.178
.192
.216
.209
.270
.305
.290

.123
.145
.165
.179
.203
.196
.257
.292
.277

.094
.085
.105
.119
.144
.137
.152
.188
.173

.019
.028
.030
.031
.034
.033
.038
.042
.040

1
2
2
2
2
2-3*
3
3
3

 

Pan Head
Machine Screws
Tapping Screws
Self Drilling Screws

SLOTTED

 

PHILLIPS

 

Nominal
Size

A

H

H1

J

T

M

G

N

Phillips
Driver
Size

Head Diameter

Height of Head

Width of Slot

Depth of Slot

Dimensions of Recess

Slotted

Recessed

Diameter

Depth

Width

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

2
3
4
5
6
7

8
10
12
1/4
5/16
3/8

.167
.193
.219
.245
.270
.296
.322
.373
.425
.492
.615
.740

.155
.180
.205
.231
.256
.281
.306
.357
.407
.473
.594
.716

.053
.060
.068
.075
.082
.089
.096
.110
.125
.144
.178
.212

.045
.051
.058
.065
.072
.079
.085
.099
.112
.130
.162
.195

.062
.071
.080
.089
.097
.106
.115
.133
.151
.175
.218
.261

.053
.062
.070
.079
.087
.096
.105
.122
.139
.162
.203
.244

.031
.035
.039
.043
.048
.048
.054
.060
.067
.075
.084
.094

.023
.027
.031
.035
.039
.039
.045
.050
.056
.064
.072
.081

.031
.036
.040
.045
.050
.054
.058
.068
.077
.087
.106
.124

.022
.026
.030
.034
.037
.041
.045
.053
.061
.070
.085
.100

.104
.112
.122
.158
.166
.176
.182
.199
.259
.281
.350
.389

.091
.099
.109
.145
.153
.163
.169
.186
.246
.268
.337
.376

.059
.068
.078
.083
.091
.100
.108
.124
.141
.161
.193
.233

.017
.019
.019
.028
.028
.029
.030
.031
.034
.036
.169
.210

1
1
1
2
2
2
2
2
3
3
4
4

 

Head Dimensions

Combination Drive
Pan Head

 

 

G

H

J

A

M

T

F

N

 

 

Screw
Size

Head
Dimensions

Slot
Dimemsions

Recess
Dimensions

Driver
Size

Head
Diam.

Head
Height

Width

Depth

Width

Depth

Max.
Rad

Min.
Wing
Width

Recess
Penetration

Max.

Min.

Max.

Min.

Max.

Min.

0

.116
.104

.044
.036

--

--

--

--

.067
.054

.039
.021

.010

.013

.032

.014

0

1

.142
.130

.053
.044

--

--

--

--

.074
.061

.045
.025

.010

.014

.040

.022

0

2

.167
.155

.062
.053

.031

.023

.031

.022

.104
.091

.059
.041

.020

.017

.052

.034

1

3

.193
.180

.071
.062

.035

.027

.036

.026

.112
.099

.065
.050

.020

.019

.061

.043

1

4

.219
.205

.080
.070

.039

.031

.040

.030

.122
.109

.078
.060

.020

.019

.071

.053

1

5

.245
.231

.089
.079

.043

.035

.045

.034

.158
.145

.083
.057

.025

.028

.072

.046

2

6

.270
.256

.097
.087

.048

.039

.050

.037

.166
.153

.091
.066

.025

.028

.080

.055

2

7

.296
.281

.106
.096

.048

.039

.054

.041

.176
.163

.100
.075

.025

.029

.089

.064

2

8

.322
.306

.115
.105

.054

.045

.058

.045

.182
.169

.108
.082

.025

.030

.097

.071

2

10

.373
.357

.133
.122

.060

.050

.068

.053

.199
.186

.124
.100

.025

.031

.113

.089

2

12

.425
.407

.151
.139

.067

.056

.077

.061

.259
.246

.141
.115

.030

.034

.124

.098

3

1/4

.492
.473

.175
.162

.075

.064

.087

.070

.281
.268

.161
.135

.030

.036

.144

.118

3

5/16

.615
.594

.218
.203

.084

.072

.106

.085

.350
.337

.193
.169

.035

.059

.173

.149

4

3/8

.740
.716

.261
.244

--

--

--

--

.389
.376

.233
.210

.035

.065

.213

.190

4

7/16

.863
.838

.304
.286

--

--

--

--

.413
.400

.259
.234

.035

.068

.239

.214

4

1/2

.987
.958

.348
.327

--

--

--

--

.435
.422

.280
.255

.035

.071

.260

.235

4

 

 

Square Drive Pan Head

Self Tapping Screws

This type of recess has a square center opening, slightly tapered side walls and a conical bottom.

Nominal
Size or Basic Screw
Diameter

H

R

M

T

Driver
Size

P

Head
Height

Head
Radius

Recess
Square

Recess
Depth

Penetration
Gauging Depth

Max

Min

Min

Max

Min

Max

Min

Max

Min

3

0.0990

4

0.1120

5

0.1250

6

0.1380

 

0.078
0.086
0.095
0.103

0.067
0.075
0.083
0.091

0.010
0.010
0.015
0.015

0.071
0.071
0.091
0.091

0.0696
0.0696
0.090
0.090

0.073
0.073
0.113
0.113

0.063
0.063
0.105
0.105

0
0
1
1

0.038
0.038
0.065
0.065

0.032
0.032
0.057
0.057

7

0.1510

8

0.1640

10

0.1900

12

0.2160

 

0.111
0.120
0.137
0.153

0.099
0.107
0.123
0.139

0.015
0.015
0.020
0.025

0.091
0.112
0.112
0.133

0.090
0.111
0.111
0.1315

0.113
0.140
0.140
0.165

0.105
0.119
0.119
0.155

1
2
2
3

0.065
0.075
0.075
0.095

0.057
0.065
0.065
0.085

1/4

0.2500

5/16

0.3125

3/8

0.3750

 

0.175
0.216
0.256

0.160
0.198
0.237

0.035
0.040
0.040

0.133
0.191
0.191

0.1315
0.1895
0.1895

0.165
0.201
0.201

0.155
0.191
0.191

3
4
4

0.095
0.100
0.100

0.085
0.090
0.090

 

 

Pan Head Torx® Drive

 

Screw
Size

Head Dimensions

Recess Dimensions

D

H

R

G

(Fallaway)
Penetration

Head
Diameter

Head
Height

Ref.

Gage
Penetration

Max.

Min.

Max.

Min.

Min.

Max.

4
6
8
10

.219
.270
.322
.372

.205
.256
.306
.357

.080
.097
.115
.133

.070
.087
.105
.122

.111
.132
.155
.178

.035
.045
.055
.070

.016
.020
.025
.025

 

 

Truss Head
Machine Screws
Tapping Screws

SLOTTED

 

PHILLIPS

 

Nominal
Size

A

H

J

T

M

G

N

Phillips
Driver
Size

Head Diameter

Height of Head

Width of Slot

Depth of Slot

Dimensions of Recess

Diameter

Depth

Width

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

4
6
8
10
1/4
5/16
3/8

.257
.321
.384
.448
.573
.698
.823

.241
.303
.364
.425
.546
.666
.787

.069
.086
102
.118
.150
.183
.215

.059
.074
.088
103
133
162
.191

--
.048
.054
.060
.075
.084
.094

--
.039
.045
.050
.064
.072
.081

--
.050
.058
.068
.087
.106
.124

--
.037
.045
.053
.070
.085
.100

.112
.158
.173
.188
.263
.352
--

.099
145
.160
.175
.250
.339
--

.069
.084
.099
.115
.143
.193
--

.017
.027
.029
.030
.033
.059
--

1
2
2
2
3
4
--

 

Threads For Self Tappings Screws

Type A

 

Nominal Size or
Basic Screw Diameter

Threads
per Inch

D

d

L

Major
Diameter

Minor
Diameter

These Lengths or Shorter Have AB Threads

Max.

Min.

Max.

Min.

90°
Heads

Csk
Heads

6

0.139

7

0.155

8

0.165

10

0.192

12

0.218

14

0.252

20

0.330

24

0.385

 

18
16
15
12
11
10
9
9

0.141
0.158
0.168
0.194
0.221
0.254
0.333
0.390

0.136
0.152
0.162
0.188
0.215
0.248
0.327
0.383

0.102
0.114
0.123
0.133
0.162
0.185
0.234
0.291

0.096
0.108
0.116
0.126
0.155
0.178
0.226
0.282

1/4
5/16
3/8
3/8
7/16
1/2
11/16
3/4

5/16
3/8
7/16
1/2
9/16
5/8
13/16
1

 

TypeAB

 

Nominal Size or
Basic Screw Diameter

Threads
per Inch

D

d

L

Major
Diameter

Minor
Diameter

These Lengths or Shorter Have AB Threads

Max.

Min.

Max.

Min.

90°
Heads

Csk
Heads

4

0.1120

6

0.1380

8

0.1640

10

0.1900

12

0.2160

1/4

0.2500

5/16

0.3125

3/8

0.3750

 

24
20
18
16
14
14
12
12

0.114
0.139
0.188
0.189
0.215
0.246
0.315
0.380

0.110
0.135
0.161
0.183
0.209
0.240
0.306
0.371

0.086
0.104
0.122
0.141
0.164
0.192
0.244
0.309

0.082
0.099
0.116
0.135
0.157
0.185
0.236
0.299

3/16
7/32
9/32
21/64
3/8
13/32
5/8
3/8

7/32
17/64
21/64
3/8
13/32
15/32
3/4
29/32

 

Type 25

Type B

 

Nominal Size or
Basic Screw Diameter

Threads
per
Inch

D

d

P

S

L

Major
Diameter

Minor
Diameter

Point
Diameter

Point Taper Length

Determinant
Length for
Point Taper

Minimum Practical
Screw Length

For Short Screws

For Long Screws

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

90°
Heads

Csk Heads

90°
Heads

Csk Heads

2

0.0860

4

0.1120

6

0.1380

8

0.1640

10

0.1900

12

0.2160

14

0.2500

5/16

0.3125

3/8

0.3750

 

32
24
20
18
16
14
14
12
12

0.088
0.114
0.139
0.166
0.189
0.215
0.246
0.315
0.380

0.084
0.110
0.135
0.161
0.183
0.209
0.240
0.306
0.371

0.064
0.086
0.104
0.122
0.141
0.164
0.192
0.244
0.309

0.060
0.082
0.099
0.116
0.135
0.157
0.185
0.236
0.299

0.058
0.079
0.095
0.112
0.130
0.152
0.179
0.230
0.293

0.054
0.074
0.089
0.106
0.123
0.145
0.171
0.222
0.285

0.062
0.083
0.100
0.111
0.125
0.143
0.143
0.167
0.167

0.047
0.063
0.075
0.083
0.094
0.107
0.107
0.125
0.125

0.078
0.104
0.125
0.139
0.156
0.179
0.179
0.196
0.196

0.062
0.083
0.100
0.111
0.125
0.143
0.143
0.161
0.161

7/64
3/16
1/4
5/16
3/8
7/16
1/2
15/32
17/32

3/16
1/4
5/16
7/16
1/2
9/16
5/8
19/32
11/16

7/64
9/64
11/64
3/16
15/64
9/32
9/32
27/32
15/16

5/32
3/16
1/4
1/4
5/16
3/8
3/8
31/32
1 1/8

 

 

Type High-Low
Self Tapping Screws

 

Nominal Diameter
and Thread

D

B

P

Head Size

High
Thread Diameter

Low
Thread Diameter

Point Diameter

4-24

.105-.115

.086

.061-070

3

6-19

.135-.145

.108

.080-.090

5*

8-18

.160-.170

.130

.095-.105

6

10-16

.185-.195

.145

.099-.110

8

1/4-15

.250.260

.200

.161-175

1/4

*Special Dimensions for Pan-Head

 

Pan Head

 

Nominal
Size

A

H

M

G

Phillips
Driver Size

Diameter of Head

Height of Head

Dimensions of Recess

Recessed

Diameter

Depth

Max

Min.

Max

Min.

Max

Min.

Max

Min.

4*

.193

.180

.071

.062

.112

.099

.062

.053

1

6

.254

.240

.097

.087

.158

.145

.072

.046

2

8

.270

.256

.097

.087

.166

.153

.080

.055

2

10

.322

.306

.115

.105

.182

.169

.097

.071

2

1/4

.492

.473

.175

.162

.259

.246

.144

.118

3

*No. 2 Head

 

Hex Washer Head

 

Nominal Size

A

W

H

F

U

Width
Across Flats

Width
Across
Corners

Height of
Head

Diameter of
Washer

Thickness of
Washer

Max.

Min.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

4

.125

.120

.134

.055

.044

.177

.163

.016

.010

6

.188

.181

.202

.070

.058

.260

.240

.025

.015

8

.250

.244

.272

.093

.080

.328

.302

.025

.015

10

.250

.244

.272

.110

.096

.348

.322

.031

.019

 

Wing Screws

Basic
Screw
Dia.

Thrd per Inch

S

H

W

d

D

G

T

L

Wing Spread

Wing Hght

Wing Thick.

Shank
Dia.

Shank Dia.

Hght

Stock Thick.

Practical Screw Lngth

Max

Min.

Max

Min.

Max

Min.

Max

Min.

Max

Min.

Max

Min.

Max

Min.

Max

Min.

8
10
1/4
5/16

32
24
20
18

0.78
0.90
1.09
1.31

0.72
0.84
1.03
1.25

0.40
0.46
0.46
0.62

0.34
0.40
0.40
0.56

0.18
0.21
0.26
0.29

0.12
0.15
0.20
0.23

0.35
0.35
0.47
0.57

0.31
0.31
0.43
0.53

0.40
0.53
0.61
0.68

0.34
0.47
0.55
0.62

0.21
0.22
0.24
0.29

0.14
0.16
0.18
0.23

0.04
0.04
0.04
0.07

0.03
0.03
0.03
0.05

0.75
1.00
1.50
1.50

0.38
0.38
0.50
0.50

 

 

Hex Washer Slotted
Self Piercing Screws

 

Size

A

W

H

F

U

J

T

D

d

Width
Across Flats

Width
Across
Corner

Head Height

Washer Diam.

Washer Thickness

Slot Width

Slot Depth

Major Diam.

Minor Diam.

Max.

Min.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

6-18
7-16
8-15
10-12

.250
.250
.250
.258

.244
.244
.244
.244

.272
.272
.272
.272

.093
.093
.110
.110

.080
.080
.096
.096

.328
.328
.348
.414

.302
.302
.322
.384

.025
.029
.031
.031

.015
.017
.019
.019

.048
.048
.054
.054

.039
.039
.045
.045

.053
.062
.074
.074

.033
.040
.052
.052

.141
.158
.168
.194

.136
.152
.162
.188

.102
.114
.123
.133

.096
.108
.116
.126

 

Threads and Points for Thread Cutting Screws and Self-Tapping Screws

Type F

Type 1

Type 23

 

Nominal Size or
Basic Screw Diameter

Threads
per
Inch

D

P

S

L

Major
Diameter

Point
Diameter

Point Taper Length

Determinant
Length for
Point Taper

Minimum Practical
Screw Length

For Short Screws

For Long Screws

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

90°
Heads

Csk Heads

90°
Heads

Csk Heads

2

0.0860

4

0.1120

6

0.1380

 

56
40
32

0.0860
0.1120
0.1380

0.0813
0.1061
0.1312

0.068
0.087
0.107

0.061
0.078
0.096

0.062
0.088
0.109

0.045
0.062
0.078

0.080
0.112
0.141

0.062
0.088
0.109

5/32
7/32
1/4

3/16
1/4
5/16

5/32
3/16
1/4

3/16
1/4
5/16

8

0.1640

10

0.1900

10

0.19000

 

32
24
32

0.1640
0.1900
0.1900

0.1571
0.1818
0.1831

0.132
0.148
0.158

0.122
0.135
0.148

0.109
0.146
0.109

0.078
0.104
0.078

0.141
0.188
0.141

0.109
0.146
0.109

1/4
11/32
1/4

11/32
7/16
11/32

1/4
5/16
1/4

5/16
13/32
5/16

12

0.2160

14

0.2500

5/16

0.3125

3/8

0.3750

 

24
20
18
16

0.2160
0.2500
0.3125
0.3750

0.2078
0.2408
0.3026
0.3643

0.174
0.200
0.257
0.312

0.161
0.184
0.239
0.293

0.146
0.175
0.194
0.219

0.104
0.125
0.139
0.156

0.188
0.225
0.250
0.281

0.146
0.175
0.194
0.219

11/32
13/32
15/32
1/2

7/16
17/32
19/32
11/16

5/16
3/8
7/16
15/32

13/32
1/2
9/16
5/8

 

Machine Screws

Nominal Screw Size

O thru l2

1/4 thru 3/4

Nominal Screw Length

Tolerance on Length

Up to 1/2 in., Incl.
Over 1/2 to 1 in., Incl.
Over 1 to 2 in., Incl.
Over 2 in.

-0.02
-0.03
-0.06
-0.09

-0.03
-0.03
-0.06
-0.09

 

 

Type A - AB

Nominal Screw Length

Tolerance on Length

Up to 1 in., Incl.
Over 1 in.

+ 0.03
+ 0.05

 

 

Type B, F, H-L 1,
25 and 23

Nominal Screw Length

Tolerance on Length

Up to 3/4 in., Incl.
Over 3/4 to 1-1/2 in., Incl.

- 0.03
- 0.05

 

 

Type U

Nominal Screw Length

Tolerance on Length

Up to 3/8 in., Incl.
Over 3/8 in.

+ 0.02
+ 0.03

 

 

Wood Screws

Nominal Screw Length

Tolerance on Length

Up to 5/8in., Incl.
Over 5/8 to l-1/2 in., Incl.
Over l-1/2 to 2-3/4 in., Incl.
Over 2-3/4 to 5 in., Incl.

-0.03
-0.05
-0.06
-0.09