Screw Size per Diameter
| Size |
Screw Diameter |
| 256 |
0.086" |
| 440 |
0.112" |
| 632 |
0.138" |
| 832 |
0.164" |
| 1024 |
0.190" |
| 1032 |
0.190" |
| 1/4-20 |
0.250" |
| 3/8-16 |
0.375" |
| 1/2-13 |
0.500" |
The last two numbers in the size are the number of threads per inch.
Title: Bolt and Screw Sizes
Description: List of diameters of the threads.
Published: 10/22/2007
Last Edited: 12/29/2022
Information disclaimer:
The information contained in this article is for general information purposes only. The information is provided by
United States Plastic Corp. and while we endeavor to keep the information up to date and correct, we make no representations or
warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability or availability with
respect to the website or the information, products, services, or related graphics contained on the website for any purpose.
Any reliance you place on such information is therefore strictly at your own risk.
In no event will we be liable for any loss or damage including without limitation, indirect or consequential loss
or damage, or any loss or damage whatsoever arising from loss of materials, time or profits arising out of,
or in connection with, the use of this information.