Best Mechanical Extension Springs (May 2022)

There are a few things to consider when choosing the "best mechanical extension springs."

The first thing to consider is the type of extension you need. There are three main types of extension springs: coiled, compressed, and torsion.

Coiled extension springs are the most common type. They are made out of a coil of metal wire that is wrapped around a metal core. When you extend the spring, the metal wire unwraps and creates a force that pushes the object it's attached to forward.

Compressed extension springs are similar to coiled extension springs, but the metal wire is compressed instead of wrapped around the metal core. This makes the spring more durable and less likely to break.

Torsion extension springs are the least common type. They use a twisting motion to create the force that pushes objects forward. This type of extension spring is best for objects that need a lot of force, like door hinges or window screens.

Prime-Line Products SP 9618 Spring, Extension, 5/8-Inch by 3-1/4-Inch – .072 Diameter,(Pack of 2)

Material	Alloy Steel
Brand	PRIME-LINE
Assembled Diameter	0.63 Inches
Color	Nickel
Finish Type	Nickel

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About the item

For use in a variety of applications; appliances, automotive, marine, toys, tools, mechanical devices, contraptions and more
These extension springs are designed with single loop open ends for easy and reliable fastening to fixed and moving parts
Spring dimensions: 5/8 in. outside diameter, 3-1/4 in. length, 0.072 in. wire diameter, 19.1 lbs. maximum safe load, 2.01 in. maximum deflection
All springs come in a beautiful, corrosion resistant, nickel plated finish allowing them to be used both indoors and out
Constructed of durable spring steel (tempered steel wire) to provide optimum retraction when stretched