Internal thread: Threads that run along the inside of a fastener.

External threads: Threads that wind around the exterior of a fastener’s shaft.

There are a number of common terms to describe different aspects of threads, which we define below: For parts such as screws, the ridges will be on the exterior, and parts like nuts have ridges inside of their cylindrical bodies.

Threads are continuous helical ridges on cylindrical fasteners. Left-Handed Threads Thread Terminology and Different Types Linear object movement: Fastener threads can be used to convert rotary motion to linear motion.Gear reduction: Screw threads help with gear reduction by using worm drives.Fastening: Screw threads appear on traditional fasteners such as nuts, bolts, and screws, and they also help connect threaded pipes, hoses, caps, and fixtures.Screw threads help with many different applications, such as: Common Uses and Applications of Fastener Threads In this blog, we explore a few of the many different varieties of threads as well as their uses. Additionally, many different types of threads exist to optimize different ways to fasten objects. Many fasteners work through the effective use of threads (left-hand thread and right-hand thread), which allow nuts and bolts to screw together effectively.īut how do threads work? The direction in which workers screw and unscrew fasteners has a lot to do with the applications in which they appear.

Print This Page Email This Page Left-Handed and Right-Handed Fastener Threads: Uses and Comparison National Bolt | May 13, 2019įasteners are the nuts, bolts, screws, and other small components that keep machinery and components together in working order.

Reverse thread bolt extractor