At The Spring Store you do not have to wait days to get a quote on a specialty spring. Just like we make buying stock springs simple we make designing and buying custom springs a fast and easy task. Instant Spring Quote is a reliable and easy-to-use tool that allows you to get a quote instantly of the custom spring you are looking for. You just input the dimensions of the custom spring you need and instantly get pricing based on different quantity lots. You just have to select the amount you need and checkout. If for any reason you do not see a quote there are some important points you need to be aware of. The following are three issues that need to be adjusted if you are not getting an instant quote back.

1. Wire Size:

When it comes to wire size, springs need to be manufactured based on standard wire sizes. If you input a wire size that does not match a standard wire size it would not be manufacturable and therefore you would not recieve a quote. Also, some wire size may only be available in one material type but not all. Keep in mind that the following are the available wire sizes: 0.008" to 0.078" in both Music Wire ASTM A228(MW) and Stainless Steel 302 AST(SST 302s. For sizes 0.079" to 1.250" please take a look at our standard wire size chart here.

compression spring wire

2. Material Type:

The material type of each compression spring is important. Consider what material type you are selecting when trying to get a custom spring quoted. As we previously mentioned, there are certain material types that are not usually available in certain wire sizes, and there are also rare materials types that require us to quote your springs on a case by case basis. There are many times where you can alternate for a similar wire type. However, this is not always recommended, especially when it comes to springs that will be placed under humid and corrosive environments. In those cases, it is necessary that you acquire a stainless steel spring. If the material type you are looking for is not automatically quoted, please contact one of our design engineers at

instant quote material type

3. Index Issues:

Spring index is the proportional ratio between the mean diameter and the wire diameter of a spring. It is a number that helps determine the manufacturability of the spring, and how tight or loose the spring coils are (factors that are greatly involved with the force, stress, and elastic capacity of such spring). If your spring index is too small you will need to decrease the wire diameter or increase the outer diameter in order to increase it. Yet, if your spring index is too large, you can try increasing the wire diameter or decreasing the wire diameter.

NOTE: The minimum index is 4.0 on wire diameters from 0.008" to 0.115" and 3.0 on wire diameters 0.118" and above and the maximum index is 25.0 on all wire diameters.

Index = Mean Dia. ÷ Wire Dia.

Mean Dia. = Outer Dia. – Wire Dia.

Mean Dia. = Inner Dia. + Wire Dia.

compression spring index

In case that your spring design is not providing an instant spring quote and you have revised the previous issues please take a look at our Instant Quote Help Page We are here to enhance your experience and look forward to working with you. Contact us directly and ask for a design engineer at (951) 276-2777

We look forward to helping you with your metal spring needs!