You need a compression spring that actually matches your project's dimensions, but springs come in so many diameters and lengths that it's easy to buy a handful of the wrong size. This five-piece set of heavy duty compression springs from the fasteners, springs, and industrial hardware category aims to solve that by offering an assortment of sizes rather than a single specification.
Quick verdict
At USD 15.99, this is a no-fuss five-piece assortment of heavy duty compression springs made from spring steel. For small repairs, prototypes, or parts that need a modest push-back force, it's a convenient starting point. The trade-off: with only five pieces and an untreated surface, it won't cover large jobs or applications where corrosion resistance is a priority.
Who it suits
This set fits DIY metalworking, industrial machinery repairs, and car parts projects where you need a few springs on hand. If you're modifying something or troubleshooting a broken spring, having a range of outer diameters and lengths gives you a better chance of landing on a usable fit without a separate order.
What stands out from the listed details
The springs are built from 65Mn spring steel. The wire diameter sits at 1.4mm, and the assortment spans outer diameters from 8mm to 22mm with lengths from 10mm to 100mm. That's a practical spread for many small- to mid-sized compression spring applications. The surface treatment is untreated, so no protective coating is described.
Meaningful trade-offs
Five pieces is a small quantity. If you're working on a project that needs six or more identical springs, this set won't cover it. Because the sizes are assorted, you may also end up with only one spring in the exact size you need, and the other four become spares. The untreated surface means there's no protective coating described, so in humid or outdoor conditions, the springs may be more prone to surface oxidation over time. That's not a deal-breaker for indoor dry applications, but it's worth weighing.
Bottom line
The 5PCS Heavy Duty Compression Springs set is a reasonable way to get a small range of spring sizes into your toolbox for a modest outlay. It's not a precision kit and it's not meant for large production runs, but for occasional repairs, prototyping, or one-off fixes, it gives you a useful selection of spring steel compression springs in one package.
5PCS Heavy Duty Compression Springs Spring Steel Assorted Sizes
This five-piece assortment crams a lot of sizing variety into a compact package. Choose it if you need an affordable handful of heavy duty springs for small machinery, car parts, or DIY metalworking projects and you don't yet know the exact size you'll need. With a 1.4mm wire diameter and sizes ranging from 8mm to 22mm outer diameter and 10mm to 100mm in length, it covers a wide enough spread for many trial-and-error fits. On the other hand, five pieces go fast, and the untreated finish means you're getting bare spring steel with no protective coating described, so it's best suited for indoor, dry environments and jobs that need only a few springs.
