Metric Specification for Depth of Threads

 

 Depths of Threads

Thread

Tapped Through (Inches)

Blind Tap Depth (Inches)

  

Aluminum, Brass, Steel, Nylon

Stainless Steel

Aluminum, Brass, S.S., Steel, Nylon

0-80

1-72

2-56

3-48

3-56

4-40

4-48

5-40

6-32

6-40

8-32

10-24

10-32

12-24

1/4-20

1/4-28

5/16-18

5/16-24

3/8-16

3/8-24

7/16-14

7/16-20

1/2-13

1/2-20

 

3/8

3/8

3/4

3/4

3/4

1"

1"

1"

1"

1"

1"

1-1/8

1-1/8

1-1/8

1-1/4

1-1/4

1-1/4

1-1/4

1-1/4

1-1/4

1-1/4

1-1/4

1-1/4

1-1/4

 

1/4

1/4

5/8

5/8

5/8

3/4

3/4

3/4

1"

1"

1"

1"

1"

1"

1-1/4

1-1/4

1-1/4

1-1/4

1-1/4

1-1/4

1-1/4

1-1/4

1-1/4

1-1/4

 

3/16

3/16

3/16

3/16

3/16

1/4

1/4

5/16

3/8

3/8

7/16

1/2

1/2

1/2

5/8

5/8

5/8

5/8

5/8

5/8

5/8

5/8

5/8

5/8