Dimensions of Commonly used UNC and UNF Bolt Sizes

High-Performance Pipe and Bolt Threading Machine Options

Oster’s industrial-grade pipe and bolt threading machines include an extensive selection of heavy-duty threading machines. We also manufacture a high-performance dark thread cutting oil to ensure your threading machine works efficiently and effectively.

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As a customer-centric manufacturer, Oster is committed to providing you with exceptionally designed and durable pipe and bolt threading machines. Discuss your project with us or request a quote and order your threading machine today.

Size

Threads Per Inch

Class Thread

Major Diameter

Min

Max

Pitch Diameter

Min

Max

Minor Diameter

1/4

20

2A

0.2489

0.2408

0.2164

0.2127

0.1876

28

2A

0.2490

0.2425

0.2258

0.2225

0.2052

5/16

18

2A

0.3113

0.3026

0.2752

0.2712

0.2431

24

2A

0.3114

0.3042

0.2843

0.2806

0.2603

3/8

16

2A

0.3737

0.3643

0.3331

0.3287

0.2970

24

2A

0.3739

0.3667

0.3468

0.3430

0.3228

7/16

14

2A

0.4361

0.4258

0.3897

0.3850

0.3485

20

2A

0.4362

0.4281

0.4237

0.3995

0.3749

1/2

13

2A

0.4985

0.4876

0.4485

0.4435

0.4041

20

2A

0.4987

0.4906

0.4662

0.4619

0.4374

9/16

12

2A

0.5609

0.5495

0.5068

0.5016

0.4587

18

2A

0.5611

0.5524

0.5250

0.5205

0.4929

5/8

11

2A

0.6234

0.6113

0.5644

0.5589

0.5119

18

2A

0.6236

0.6149

0.5875

0.5828

0.5449

3/4

10

2A

0.7482

0.7353

0.6832

0.6773

0.6255

16

2A

0.7485

0.7391

0.7079

0.7029

0.6718

7/8

9

2A

0.8731

0.8592

0.8009

0.7946

0.7368

14

2A

0.8734

0.8631

0.8270

0.8216

0.7858

1

8

2A

0.9980

0.9830

0.9168

0.9100

0.8446

12

2A

0.9982

0.9868

0.9441

0.9382

0.8960

NC Thread Profiles

Unified

American National

 

Custom Applications or Technical Questions – Oster is here for you!

When you call Oster Manufacturing there is always a human being on the other end of the line. We have skilled technical and sales experts on hand to take your call. If you’re interested in a machine or tooling for a non-standard threading application we are happy to consult with you on the project and come up with custom engineered solutions to make your project idea a reality. We can make a variety of custom tooling for special projects and keep them in stock for you so you never have to wait when it comes to a difficult project.

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