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Projection Weld Screws (Type U3)

Nominal Size

Head Dia.

Head Height

Projection Dia.

Projection Height

Locating Circle

Radius on Edge Of Head

Fillet Radius

Max

Min

Max

Min

Max

Min

Max

Min

Dia Ref

Max

Max

4

.260

.240

.046

.036

.045

.035

.017

.013

.180

.015

.015

6

.323

.303

.052

.042

.055

.045

.022

.018

.226

.025

.020

8

.385

.365

.068

.058

.075

.065

.027

.023

.268

.035

.025

10

.448

.428

.068

.058

.085

.075

.032

.028

.312

.040

.030

1/4

.575

.550

.083

.073

.105

.095

.042

.038

.406

.050

.040

5/16

.755

.725

.099

.089

.125

.115

.047

.043

.531

.055

.045

3/8

.880

.850

.114

.104

.135

.125

.052

.048

.625

.065

.050

1/2

1.005

.975

.146

.136

.155

.145

.062

.058

.750

.085

.060

Projection Weld Screws (Type T3)

Nominal Size

Head Dia.

Head Height

Projection Dia.

Projection Height

Locating Circle

Radius on Edge Of Head

Fillet Radius

Max

Min

Max

Min

Max

Min

Max

Min

Dia Ref

Max

Max

4

.228

.208

.036

.026

.045

.035

.017

.013

.128

.015

.015

6

.260

.240

.046

.036

.055

.045

.022

.018

.156

.025

.020

8

.323

.303

.052

.042

.075

.065

.027

.023

.203

.035

.025

10

.385

.365

.068

.058

.085

.075

.032

.028

.250

.040

.030

1/4

.510

.485

.083

.073

.105

.095

.042

.038

.312

.050

.040

5/16

.630

.605

.099

.089

.125

.115

.047

.043

.390

.055

.045

3/8

.755

.725

.114

.104

.135

.125

.052

.048

.485

.065

.050

1/2

1.005

.975

.146

.136

.155

.145

.062

.058

.660

.085

.060

Projection Weld Screws (Type TD)

Nominal Size

Head Dia.

Head Height

Projection Dia.

Projection Height

Radius on Edge Of Head

Fillet Radius

Max

Min

Max

Min

Max

Min

Max

Min

Max

Max

6

.260

.240

.046

.036

.143

.133

.027

.022

.025

.020

8

.323

.303

.052

.042

.169

.159

.028

.023

.035

.025

10

.385

.365

.068

.058

.195

.185

.028

.023

.040

.030

1/4

.510

.485

.083

.073

.255

.245

.031

.026

.050

.040

5/16

.630

.605

.099

.089

.317

.307

.031

.026

.055

.045

3/8

.755

.725

.114

.104

.380

.370

.033

.028

.065

.050

1/2

1.005

.975

.146

.136

.505

.495

.035

.030

.085

.060

Projection Weld Screws (Type UR)

Nominal Size

Head Dia.

Head Height

Projection Ring Dia.

Projection Ring Height

Ring Width

Radius on Edge Of Head

Fillet Radius

Max

Min

Max

Min

Ref

Max

Min

Ref

Max

Max

4

.260

.240

.046

.036

.195

.013

.008

.022

.015

.015

6

.323

.303

.052

.042

.219

.015

.010

.025

.025

.020

8

.385

.365

.068

.058

.266

.018

.013

.031

.035

.025

10

.448

.428

.068

.058

.328

.020

.015

.035

.040

.030

1/4

.575

.550

.083

.073

.422

.027

.021

.048

.050

.040

5/16

.755

.725

.099

.089

.531

.033

.027

.060

.055

.045

3/8

.880

.850

.114

.104

.641

.037

.031

.068

.065

.050

1/2

1.005

.975

.146

.136

.734

.047

.041

.088

.085

.060

Projection Weld Screws (Type US3)

Nominal Size

Head Dia.

Head Height

Projection Length

Projection Width

Projection Height

Locating Circle

Radius on Edge Of Head

Fillet Radius

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Ref

Max

Max

1/4

.717

.687

.083

.073

.210

.170

.100

.080

.035

.030

.540

.050

.040

5/16

.780

.750

.098

.088

.270

.230

.100

.080

.035

.030

.600

.055

.045

3/8

.905

.875

.114

.104

.270

.230

.130

.110

.40

.035

.700

.065

.050

7/16

.967

.937

.161

.151

.330

.290

.130

.110

.050

.045

.760

.075

.055

1/2

1.030

1.000

.161

.151

.330

.290

.130

.110

.050

.045

.820

.085

.060

Projection Weld Screws (Type UC4)

Nominal Size

Head Dia.

Inside Rim Dia.

Head Height

Rim Depth

Projection Dia.

Projection Height

Locating Circle

Radius on Edge Of Head

Fillet Radius

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Dia Ref

Max

Max

2

.225

.205

.195

.175

.042

.032

.005

.002

.035

.025

.016

.012

.130

.015

.010

4

.275

.255

.240

.220

.046

.036

.006

.003

.045

.035

.017

.013

.164

.015

.015

6

.340

.320

.300

.280

.052

.042

.007

.004

.055

.045

.022

.018

.208

.025

.020

8

.400

.380

.355

.335

.068

.058

.008

.005

.065

.055

.027

.023

.244

.035

.025

10

.445

.425

.385

.375

.068

.058

.009

.006

.075

.065

.032

.028

.282

.040

.030

1/4

.580

.555

.525

.500

.083

.073

.010

.007

.095

.085

.042

.038

.375

.050

.040

5/16

.780

.750

.715

.690

.099

.089

.012

.008

.125

.115

.047

.043

.500

.055

.045

3/8

.900

.870

.830

.805

.114

.104

.013

.009

.145

.135

.052

.048

.594

.065

.050

1/2

1.125

1.095

1.050

1.025

.146

.136

.014

.010

.175

.165

.062

.058

.750

.085

.060

Projection Weld Screws (Type TC4)

Nominal Size

Head Dia.

Inside Rim Dia.

Head Height

Rim Depth

Projection Dia.

Projection Height

Locating Circle

Radius on Edge Of Head

Fillet Radius

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Dia Ref

Max

Max

2

.200

.180

.170

.150

.036

.026

.005

.002

.035

.025

.016

.012

.100

.015

.010

4

.250

.230

.215

.195

.036

.026

.006

.003

.045

.035

.017

.013

.130

.015

.015

6

.310

.290

.270

.250

.046

.036

.007

.004

.055

.045

.022

.018

.170

.025

.020

8

.350

.330

.305

.285

.052

.042

.008

.005

.065

.055

.027

.023

.190

.035

.025

10

.400

.380

.350

.331

.068

.058

.009

.006

.075

.065

.032

.028

.220

.040

.030

1/4

.510

.485

.455

.430

.083

.073

.010

.007

.095

.085

.042

.038

.282

.050

.040

5/16

.635

.610

.570

.545

.099

.089

.012

.008

.125

.115

.047

.043

.312

.055

.045

3/8

.760

.730

.690

.665

.114

.104

.013

.009

.145

.135

.052

.048

.375

.065

.050

1/2

.945

.915

.870

.845

.146

.136

.014

.010

.175

.165

.062

.058

.500

.085

.060