Expansion Springs | McMaster-Carr

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System of Measurement

Length

Spring Type

OD

Wire Diameter

Extended Length @ Maximum Load

End Type

Straight Wire with Double Loop

Spring Rate

Load

Less than 10 lb.

10 lb. to 19.9 lb.

20 lb. to 24.9 lb.

25 lb. to 49.9 lb.

50 lb. or greater

Material

Polypropylene Fabric

Stainless Steel

Minimum Load

DFARS Specialty Metals

ID

REACH

RoHS

Compliant with Exemptions

Export Control Classification Number (ECCN)

Finish

Shaft Diameter

Thread Size

Hole Diameter

Extended Length

Width

Diameter

Thickness

Maximum Torque

Useful Life

How can we improve?

4,989 Products

Power Transmission

Extension Springs

Extension Springs

As stretched, springs become increasingly harder to pull

Garter Springs

Exert radial force from all directions to maintain pressure on shafts or in seals

Strip Springs

Wrap around a shaft and extend to pull objects in a linear direction

Rotor Springs

Wind to store power, then release to create rotary motion—similar to winding a wristwatch

Spring Winders

Coil round and flat wire to make your own springs

Fastening and Joining

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

Building and Machinery Hardware

Door Springs

Extend and snap back to pull storm doors and gates closed

Overhead Door Spring Winding Rods

Overhead Door Spring Winding Rods

Keep your overhead door balanced on both tracks for smooth, even opening and closing

Fabricating and Machining

Springs for Locking Pliers

Springs for Locking Pliers

Change out worn or broken springs in the handle of your locking pliers

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)