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Standard Threads

Internal Threads
ThreadHole Diameter(in)Max Thread Depth(in)
Thread

0-80 UNC

Hole Diameter(in)

0.047

Max Thread Depth(in)

0.157

Thread

1-64 UNC

Hole Diameter(in)

0.059

Max Thread Depth(in)

0.177

Thread

2-56 UNC

Hole Diameter(in)

0.070

Max Thread Depth(in)

0.306

Thread

2-64 UNF

Hole Diameter(in)

0.070

Max Thread Depth(in)

0.306

Thread

4-40 UNC

Hole Diameter(in)

0.089

Max Thread Depth(in)

0.394

Thread

4-48 UNF

Hole Diameter(in)

0.094

Max Thread Depth(in)

0.394

Thread

5-40 UNC

Hole Diameter(in)

0.102

Max Thread Depth(in)

0.438

Thread

5-44 UNF

Hole Diameter(in)

0.104

Max Thread Depth(in)

0.438

Thread

6-32 UNC

Hole Diameter(in)

0.107

Max Thread Depth(in)

0.481

Thread

6-40 UNF

Hole Diameter(in)

0.113

Max Thread Depth(in)

0.481

Thread

8-32 UNC

Hole Diameter(in)

0.136

Max Thread Depth(in)

0.525

Thread

8-36 UNF

Hole Diameter(in)

0.136

Max Thread Depth(in)

0.525

Thread

10-24 UNC

Hole Diameter(in)

0.150

Max Thread Depth(in)

0.612

Thread

10-32 UNF

Hole Diameter(in)

0.159

Max Thread Depth(in)

0.612

Thread

1/4-20 UNC

Hole Diameter(in)

0.201

Max Thread Depth(in)

0.750

Thread

1/4-28 UNF

Hole Diameter(in)

0.213

Max Thread Depth(in)

0.750

Thread

5/16-18 UNC

Hole Diameter(in)

0.257

Max Thread Depth(in)

0.844

Thread

5/16-24 UNF

Hole Diameter(in)

0.272

Max Thread Depth(in)

0.844

Thread

3/8-16 UNC

Hole Diameter(in)

0.313

Max Thread Depth(in)

0.938

Thread

3/8-24 UNF

Hole Diameter(in)

0.332

Max Thread Depth(in)

0.938

Thread

7/16-14 UNC

Hole Diameter(in)

0.368

Max Thread Depth(in)

1.078

Thread

7/16-20 UNF

Hole Diameter(in)

0.391

Max Thread Depth(in)

1.078

Thread

1/2-13 UNC

Hole Diameter(in)

0.422

Max Thread Depth(in)

1.242

Thread

1/2-20 UNF

Hole Diameter(in)

0.453

Max Thread Depth(in)

1.242

Thread

9/16-12 UNC

Hole Diameter(in)

0.484

Max Thread Depth(in)

1.250

Thread

9/16-18 UNF

Hole Diameter(in)

0.500

Max Thread Depth(in)

1.250

Thread

5/8-11 UNC

Hole Diameter(in)

0.531

Max Thread Depth(in)

1.250

Thread

5/8-18 UNF

Hole Diameter(in)

0.563

Max Thread Depth(in)

1.250

Thread

3/4-10 UNC

Hole Diameter(in)

0.656

Max Thread Depth(in)

1.250

Thread

3/4-16 UNF

Hole Diameter(in)

0.688

Max Thread Depth(in)

1.250

MetricHole Diameter(in)Max Thread Depth(in)
Metric

M2x0.4

Hole Diameter(in)

0.063

Max Thread Depth(in)

0.306

Metric

M2.5×0.45

Hole Diameter(in)

0.081

Max Thread Depth(in)

0.350

Metric

M3x0.5

Hole Diameter(in)

0.098

Max Thread Depth(in)

0.438

Metric

M3.5×0.6

Hole Diameter(in)

0.114

Max Thread Depth(in)

0.481

Metric

M4x0.7

Hole Diameter(in)

0.130

Max Thread Depth(in)

0.525

Metric

M5x0.8

Hole Diameter(in)

0.165

Max Thread Depth(in)

0.612

Metric

M6x1.0

Hole Diameter(in)

0.197

Max Thread Depth(in)

0.750

Metric

M8x1.25

Hole Diameter(in)

0.264

Max Thread Depth(in)

0.900

Metric

M10x1.5

Hole Diameter(in)

0.335

Max Thread Depth(in)

0.938

Metric

M12x1.75

Hole Diameter(in)

0.402

Max Thread Depth(in)

1.242

STI ThreadsHole Diameter(in)Max Thread Depth(in)
STI Threads

2-56 UNC

Hole Diameter(in)

0.091

Max Thread Depth(in)

0.306

STI Threads

4-40 UNC

Hole Diameter(in)

0.118

Max Thread Depth(in)

0.394

STI Threads

4-48 UNF

Hole Diameter(in)

0.118

Max Thread Depth(in)

0.394

STI Threads

5-40 UNC

Hole Diameter(in)

0.134

Max Thread Depth(in)

0.438

STI Threads

6-32 UNC

Hole Diameter(in)

0.146

Max Thread Depth(in)

0.481

STI Threads

8-32 UNC

Hole Diameter(in)

0.172

Max Thread Depth(in)

0.525

STI Threads

8-36 UNF

Hole Diameter(in)

0.172

Max Thread Depth(in)

0.525

STI Threads

10-24 UNC

Hole Diameter(in)

0.201

Max Thread Depth(in)

0.612

STI Threads

10-32 UNF

Hole Diameter(in)

0.201

Max Thread Depth(in)

0.612

STI Threads

1/4-20 UNC

Hole Diameter(in)

0.264

Max Thread Depth(in)

0.750

STI Threads

M2x0.4

Hole Diameter(in)

0.083

Max Thread Depth(in)

0.306

STI Threads

M2.5×0.45

Hole Diameter(in)

0.104

Max Thread Depth(in)

0.350

STI Threads

M3x0.5

Hole Diameter(in)

0.126

Max Thread Depth(in)

0.438

STI Threads

M4x0.7

Hole Diameter(in)

0.167

Max Thread Depth(in)

0.525

STI Threads

M5x0.8

Hole Diameter(in)

0.209

Max Thread Depth(in)

0.612

STI Threads

M6x1.0

Hole Diameter(in)

0.248

Max Thread Depth(in)

0.750

STI Threads

M8x1.25

Hole Diameter(in)

0.331

Max Thread Depth(in)

0.900

STI Threads

M10x1.5

Hole Diameter(in)

0.413

Max Thread Depth(in)

0.938

STI Threads

M12x1.75

Hole Diameter(in)

0.492

Max Thread Depth(in)

1.242

External Threads

ThreadBoss Diameter (in)Max Thread Length (in)
Thread

UNC/UNF

Boss Diameter (in)
Max Thread Length (in)
Thread

2-56 UNC

Boss Diameter (in)

0.086

Max Thread Length (in)

0.20

Thread

2-64 UNF

Boss Diameter (in)

0.086

Max Thread Length (in)

0.20

Thread

4-40 UNC

Boss Diameter (in)

0.112

Max Thread Length (in)

0.22

Thread

4-48 UNF

Boss Diameter (in)

0.112

Max Thread Length (in)

0.22

Thread

5-40 UNC

Boss Diameter (in)

0.125

Max Thread Length (in)

0.25

Thread

5-44 UNF

Boss Diameter (in)

0.125

Max Thread Length (in)

0.25

Thread

6-32 UNC

Boss Diameter (in)

0.138

Max Thread Length (in)

0.28

Thread

6-40 UNF

Boss Diameter (in)

0.138

Max Thread Length (in)

0.28

Thread

8-32 UNC

Boss Diameter (in)

0.164

Max Thread Length (in)

0.33

Thread

8-36 UNF

Boss Diameter (in)

0.164

Max Thread Length (in)

0.33

Thread

10-24 UNC

Boss Diameter (in)

0.190

Max Thread Length (in)

0.38

Thread

10-32 UNF

Boss Diameter (in)

0.190

Max Thread Length (in)

0.38

Thread

1/4-20 UNC

Boss Diameter (in)

0.250

Max Thread Length (in)

0.50

Thread

1/4-28 UNF

Boss Diameter (in)

0.250

Max Thread Length (in)

0.50

Thread

5/16-18 UNC

Boss Diameter (in)

0.313

Max Thread Length (in)

0.675

Thread

5/16-24 UNF

Boss Diameter (in)

0.313

Max Thread Length (in)

0.675

Thread

3/8-16 UNC

Boss Diameter (in)

0.375

Max Thread Length (in)

0.75

Thread

3/8-24 UNF

Boss Diameter (in)

0.375

Max Thread Length (in)

0.75

Thread

7/16-14 UNC

Boss Diameter (in)

0.438

Max Thread Length (in)

0.875

Thread

7/16-20 UNF

Boss Diameter (in)

0.438

Max Thread Length (in)

0.875

Thread

1/2-13 UNC

Boss Diameter (in)

0.500

Max Thread Length (in)

1.00

Thread

1/2-20 UNF

Boss Diameter (in)

0.500

Max Thread Length (in)

1.00

Thread

9/16-12 UNC

Boss Diameter (in)

0.563

Max Thread Length (in)

1.25

Thread

9/16-18 UNF

Boss Diameter (in)

0.563

Max Thread Length (in)

1.25

Thread

5/8-11 UNC

Boss Diameter (in)

0.625

Max Thread Length (in)

1.25

Thread

5/8-18 UNF

Boss Diameter (in)

0.625

Max Thread Length (in)

1.25

Thread

3/4-10 UNC

Boss Diameter (in)

0.750

Max Thread Length (in)

1.50

Thread

3/4-16 UNF

Boss Diameter (in)

0.750

Max Thread Length (in)

1.50

Thread

7/8-9 UNC

Boss Diameter (in)

0.875

Max Thread Length (in)

2.00

Thread

7/8-14 UNF

Boss Diameter (in)

0.875

Max Thread Length (in)

2.00

Thread

1″-8 UNC

Boss Diameter (in)

1.000

Max Thread Length (in)

2.50

Thread

1″-12 UNF

Boss Diameter (in)

1.000

Max Thread Length (in)

2.50

MetricBoss Diameter (in)Max Thread Length (in)
Metric

M2x0.4

Boss Diameter (in)

0.079

Max Thread Length (in)

0.276

Metric

M2.5×0.45

Boss Diameter (in)

0.098

Max Thread Length (in)

0.276

Metric

M3x0.5

Boss Diameter (in)

0.118

Max Thread Length (in)

0.276

Metric

M3.5×0.6

Boss Diameter (in)

0.138

Max Thread Length (in)

0.276

Metric

M4x0.7

Boss Diameter (in)

0.157

Max Thread Length (in)

0.500

Metric

M5x0.8

Boss Diameter (in)

0.197

Max Thread Length (in)

0.500

Metric

M6x1.0

Boss Diameter (in)

0.236

Max Thread Length (in)

0.500

Metric

M8x1.25

Boss Diameter (in)

0.315

Max Thread Length (in)

0.500

Metric

M10x1.5

Boss Diameter (in)

0.394

Max Thread Length (in)

1.000

Metric

M12x1.75

Boss Diameter (in)

0.472

Max Thread Length (in)

1.000

Metric

M14x2.0

Boss Diameter (in)

0.551

Max Thread Length (in)

1.500

Metric

M16x2.5

Boss Diameter (in)

0.630

Max Thread Length (in)

1.500

Metric

M24x3.0

Boss Diameter (in)

0.945

Max Thread Length (in)

2.000

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