Standard Screw Sizes | eHow- standard 8-32 screw lengths ,8/7/2021· The length is typically the third number listed in sizing charts and follows an "x" (multiplication symbol). So a 5/8-24 x 1" screw has a diameter of 5/8", 24 threads per inch and has a 1" shaft. A #8-20 x 3/4" screw has 20 threads per inch and a shaft measuring 3/4" in length.Socket Set Screw Sizes & Specs | AFT FastenersSocket Set Screws: Sizes - Dimensions & Specifications. Socket Set Screw Dimensions (Alloy Steel) ASME B18.3-2003. *Angle is 90-degrees (+/-2 degrees) for these lengths and over, and it is 118-degress (+/-2 degrees) for shorter lengths. ** Click on the Nominal Size to shop for products. Socket Set Screws (Alloy Steel) ASME B18.3-2003.