Overall

Grip

Fillet

Fillet

Height

Height

Diameter

Height

Through Hole

Grip

Base

Diameter

Diameter

Diameter

Ferrule

P/N

Fillet

Diameter

Grip

Height

Over All

Height

Fillet

Diameter

Grip

Height

Over All

Height

Ferrules:

+.015/-.000

± .010

± .015

± .015

± .015

+.015/-.000 +.015/-.000

Through Hole

Diameter

Base

Diameter

Grip

Diameter

Fillet

Height

Through Hole

Diameter

Base

Diameter

Grip

Diameter

Fillet

Height

25F

.225

.380

.455

.390

31F

.317

.445

.578

.390

37F

.385

.505

.640

.390

43F

.442

.585

.703

.422

50F

.505

.650

.795

.438

62F

.635

.785

1.040

.516

75F

.800

1.030

1.232

.656

87F

.906

1.210

1.430

.732

1F

1.030

1.406

1.620

.770

.125

.330

.125

.125

.156

.156

.188

.188

.188

.188

.188

.188

.406

.468

.141

.546

.156

.603

.172

.745

.250

.937

+.020/-.000

1.052

1.220

.315

.390

.390

M10F

.410

.495

.650

.395

.150

.455

.135

F Ferrules, sometimes referred to as flat ferrules, are used any time the weld base is a nominal

diameter. Used on FT, NT, FB, SB, TP, HA, and SC style studs.

PITCH DIAMETER FERRULES

FERRULE SPECIFICATIONS

FULL DIAMETER FERRULES

Overall

Grip

Fillet

Fillet

Height

Height

Diameter

Height

Through Hole

Grip

Base

Diameter

Diameter

Diameter

Ferrule

P/N

+.015/-.000

± .010

± .015

± .015

± .015

+.015/-.000 +.015/-.000

25P

.222

.380

.455

.250

31P

.280

.445

.535

.250

37P

.340

.505

.595

.264

43P

.395

.585

.675

.329

50P

.462

.650

.740

.362

62P

.585

.785

.905

.433

75P

.695

1.030

1.150

.526

87P

.815

1.210

1.330

.593

.125

.125

.125

.156

.156

.156

.187

.187

.290

.110

.360

.125

.406

.125

.468

.142

.550

.172

.685

.172

.813

.250

.960

.250

1P

.955

1.410

1.525

.660

.190

1.105

.355

P Ferrules are used when the weld base is equal to the pitch diameter of the fastener. Typically only

used on PD style studs.

Used for multiple purposes in stud welding. First, the ferrule helps to shield the arc from the operator. Second, it minimizes the

atmosphere that the flux must purge. Third, the ferrule forms the molten metal into the fillet. Finally, the fillet vents allow weld gases to

escape.

Ferrules are disposable items. As disposable items they are mass manufactured quickly and inexpensively. Ferrules are cast in a mold

out of a low grade moldable ceramic. They are taken out of the mold and are dried. Because of this manufacturing method, ferrule

tolerances can be greater than machining or other manufacturing processes. Therefore, it is not recommended to fixture off of a ferrule

when exact location is required.

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