The specification 10-32NC-1b indicates a screw has which type of fit?

The specification 10-32NC-1b refers to a screw that has a 10-32 thread size with a National Coarse (NC) designation. In this context, the screw is meant to be used with a corresponding threaded hole or nut. The "1b" designation typically refers to a standard classification that assumes a loose fit, allowing for easier assembly and disassembly.

A loose fit generally provides a degree of clearance between the screw and the nut or threaded hole, which is beneficial for applications requiring frequent removal or adjustment. This fitting also accounts for variations in manufacturing tolerances, ensuring a reliable connection without excessive friction. It emphasizes functionality and practicality in assembly rather than a rigid connection, which would characterize tighter fits.

Understanding this, the classification aligns with common standards where a loose fit is preferred for certain applications, allowing for simpler installation processes and reducing the risk of galling or wear on the threads.