Choosing a compression spring is often more confusing than it looks. You open a drawer full of coils and realize the difference between one long spring and an assorted set of heavy-duty springs could mean the difference between a quick repair and another trip to the hardware store. In the fasteners springs industrial hardware world, you have to weigh length, pack size, and price. This comparison looks at a single 300mm spring and a five-piece heavy-duty set to help you pick the right one.
Quick verdict
The single Compression Spring Various Size 2-42mm Diameter \& 300mm Length Pressure Small is the straightforward, low-cost option when you need one specific 300mm spring. The 5PCS Heavy Duty Compression Springs Spring Steel Assorted Sizes is the flexible choice when you expect to handle several repairs and want a range of spring sizes in one purchase. If you already know the exact length you need, save money and buy the single. If you're not sure yet, the five-piece assortment gives you room to test.
At a glance: price and key differences
| Product | Price | What you get | Material | Length | Best for |
|---|---|---|---|---|---|
| Compression Spring Various Size 2-42mm Diameter \& 300mm Length Pressure Small | $3.69 | Single spring, open ends | Spring steel | 300mm fixed length | One specific repair or measured gap |
| 5PCS Heavy Duty Compression Springs Spring Steel Assorted Sizes | $15.99 | Five springs in assorted sizes | Spring steel | Assorted, no single fixed length | Multiple repairs or size testing |
The single costs $3.69 and the set costs $15.99. The real question isn't just price; it's whether you need one fixed length or a variety of shorter coils ready to use.
Where each product wins
- The single 300mm spring wins when you've already measured the gap and want the most direct, least expensive fix. It also wins if you specifically need a 300mm length that won't fit in an assorted pack with shorter springs.
- The five-piece heavy-duty set wins when you need several springs on hand for upcoming repairs, prototype work, or testing. It also wins if you prefer a single purchase that covers different diameters and lengths rather than ordering one size at a time.
Product notes
Compression Spring Various Size 2-42mm Diameter \& 300mm Length Pressure Small
This is the pick for a buyer who knows exactly what they need. The spring is 300mm long with a 4mm outer diameter, made of spring steel, and has open ends. At $3.69, it costs less than the set, and you get the full length you see in the title. The catch is that it's a single piece: if you need more than one spring or the size doesn't work out, you'll have to go back and order again. The open ends make it easy to fit in a variety of applications, but the fixed length means it won't compress down to fit shorter spaces. It's a targeted purchase rather than a versatile kit.
5PCS Heavy Duty Compression Springs Spring Steel Assorted Sizes
This is the better buy for general-purpose work. You get five springs in one pack, heavy-duty compression springs made from spring steel. The assorted sizing means you can experiment with a few different options before settling on the right coil for your project, which is handy when you're repairing machinery or building a prototype. At $15.99, it's a bigger upfront investment than the $3.69 single, but you're paying for variety. The trade-off is that you won't find a 300mm length here; the set is assembled with assorted lengths, so it suits a range of smaller jobs. If a long spring is critical, you'll still need to buy the single separately.
Final choice by use case
Measure your project before anything else. If a 300mm spring is the one you need, the single Compression Spring is the clear choice because it gives you that length for $3.69 without extra parts you'll never use.
If you're less sure or you have a few repairs lined up, the 5PCS Heavy Duty Compression Springs set is the practical way to cover multiple size possibilities for $15.99. You'll have five springs ready to test and use, and the heavy-duty construction suits industrial work.
