Fastener sizing can be confusing. Many home improvement enthusiasts and professionals often encounter screw specifications like “10-32.” Understanding these numerical designations is important for selecting the correct hardware for a project, ensuring a secure and functional fit. This article clarifies the “10-32” screw designation, breaking down its components and exploring its common applications.
Understanding Screw Designations
Screws are generally categorized by several key characteristics, including their diameter, threads per inch (TPI), and length. The diameter indicates the thickness of the screw’s shank, while TPI measures the number of thread peaks per linear inch. Screw diameter can be expressed either as a gauge number or in fractional/inch measurements, with gauge numbers typically used for smaller screws. Other specifications, such as material composition and drive type, also contribute to a screw’s overall description, though they are separate from the size designation. The “10-32” designation specifically refers to the screw’s diameter and thread density.
Meaning of 10-32
The “10” in “10-32” signifies the screw’s major diameter using a gauge number system. In this system, larger gauge numbers correspond to larger diameters. A #10 screw has a major diameter of approximately 0.190 inches (around 4.83 mm), which can also be identified as exactly 3/16 inch. This diameter is a standard size for many machine screw applications.
The “32” in “10-32” indicates the thread density, specifically 32 threads per inch (TPI). A higher TPI, like 32, signifies a fine thread, which offers increased resistance to loosening from vibrations and provides a stronger grip in materials. Fine threads are often preferred for applications requiring precise adjustments or where materials might be thinner or harder, as they distribute the load over more threads, creating a more secure connection.
Common Applications
The #10-32 screw is a versatile fastener used in various applications due to its diameter and fine thread pitch. It is employed in mounting computer components, such as hard drives and power supplies, where secure and vibration-resistant connections are important. These screws are also found in electrical enclosures, server rack cabinets, and other electronic mechanisms where tight rotation and stability are required. Additionally, their use extends to precision machinery assembly, automotive and aerospace industries, and even some types of furniture assembly, offering reliable fastening in metal, plastic, and other materials.