Pitch (mm):

Starts:

The thread height of a screw or bolt refers to the vertical distance from the crest to the root of the thread. Understanding thread height is essential in engineering and manufacturing, especially for designing fasteners and ensuring proper thread engagement.

## Formula

The thread height (TH) is calculated using the formula:

TH=PSTH = \frac{P}{S}TH=SP​

where:

• THTHTH is the thread height (mm)
• SSS is the number of starts (the number of independent threads wrapped around the screw or bolt)

## How to Use

Using the Thread Height Calculator is straightforward:

1. Enter the pitch value in millimeters.
2. Enter the number of starts (threads).
3. Click the “Calculate” button.
4. The calculated thread height will be displayed in millimeters.

## Example

For example, if a screw has a pitch of 2 mm and 3 starts (3 independent threads), using the calculator:

1. Enter 2 in the pitch field.
2. Enter 3 in the starts field.
3. Click “Calculate.”
4. The thread height is calculated as 23=0.67\frac{2}{3} = 0.6732​=0.67 mm.

## FAQs

• Thread height is the distance between the crest and the root of the thread on a screw or bolt.
2. Why is thread height important in fastener design?
• Thread height affects thread strength, engagement, and the overall performance of fasteners.
3. How does pitch affect thread height?
• A smaller pitch results in a larger thread height and vice versa, assuming the number of starts remains constant.
4. What does the number of starts mean?
• The number of starts indicates how many independent threads wrap around the screw or bolt.
6. Can thread height vary in different types of screws?
• Yes, thread height can vary based on the screw type, pitch, and manufacturing specifications.