Best Mechanical Extension Springs in 2025

Tempered spring steel wire

Nickel plated spring steel

Use for a variety of household applications.

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 closed ends for easy and reliable fastening to fixed and moving parts

Spring dimensions: 7/16 inch outside diameter, 3-1/2 inch length, 0.047 inch wire diameter, 8.47 lbs. maximum safe load, 3.5 inch maximum deflection

1.Material: Zinc Plated Steel, which has excellent elasticity and fatigue resistance, provide additional durability for appropriate tension.

2.Size: Including 9/32’’ x 1/2’’, 13/64’’ x 13/16’’, 3/8’’ x 5/8’’, 5/16’’ x 1-1/8’’, 1/4’’ x 13/32’’, 7/32’’ x 1’’, 3/8’’ x 3/4’’, 7/32’’ x 11/16’’, <br>1/4’’ x 7/8’’, 5/16’’ x 1-27/32’, 11/32’’ x 1-27/32’’, 5/16’’ x 1-3/4’’, 9/32’’ x 2’’, 5/32’’ x 3-1/8’’, 23/64’’ x 1-3/8’’, 3/16’’ x 1-3/4’, <br>7/32’’ x 1- 1/2’’, 9/32’’ x 1- 1/2’’, 9/32’’ x 3/4’’, 11/32’’ x 1- 7/16’. Total 20 kinds, 200pcs.

3.High quality: Stable and durable, corrosion resistant, zinc Plated surface, smooth and no stab, riveting smooth, high ductility, good<br> fatigue strength. After baking, it has antirust effect and heat treatment. It has good performance and service life.

Sufficient Quantity: the package comes with 12 pieces of 1/2-inch by 1-1/2-inch spring, enough quantity can meet your daily needs and replacement, which can bring convenience to your life

Quality Texture: SP 9706 repair kit adopts stainless steel material, with nice workmanship, strong and reliable, sturdy and quality, no rust, not easy to break and wear, can be served for a long time, so you can apply it confidently in daily usage

Spring Dimensions: outside diameter of mechanical springs is 1/2 inches, length is 1 to 1/2 inches, wire diameter is 0.041 inches, maximum safe load is 6.84 lbs, maximum deflection is 0.4 inches, please check the size carefully before buying

Maximum deflection

35.4 lb maximum safe load

Feature: 12 inch length

Sufficient Extension Spring: the package contains 10 pieces of springs 1 inch, adequate quantity to meet your daily needs and replacements

Quality and Sturdy: the spring extension is made of quality stainless steel material, which is sturdy and strong, featuring good elasticity, flexible and long lasting

Convenient Design: the extension spring is designed with 2 openings that you can use and fix it easily and conveniently

Wire Diameter:1.2mm/0.047"; Outer Diameter: 10mm/0.39"(OD); Free Length: 50mm/1.97"

Made of stainless steel material not easy to rust, more durable.

Tension spring can be used in many occasions, such as production and assembly, experiment, research and development, maintenance, etc..

PRODUCT FEATURES: All the springs are neatly packaged in plastic storage boxes, convenient to carry and use. The springs has smooth surface, good strength, strong ductility, durability and tension

WIDE APPLICATION: Widely used in doors, curtain, automobiles, bicycles, mechanical devices, umbrella, kettle, razor, aircraft, antique tape recorder, repair toy, pliers, piano, scissors, electrical, etc.

PACKAGE CONTENT: 20 Different Sizes, 200 Pieces Compression and Extension Springs Assortment Kit

Antirust materials : Stainless steel 304 wire Which can not rust in humid environment and have strong oxidation resistance, acid resistance and corrosion resistance.

Easy storage and use : All the extension springs are neatly packed in a plastic storage box and size label can be use to identify spring sizes.

Versatile : 15 Kinds of size springs which you may choose for home repairs. We hope this springs assortment kit will suitable for most repair project, Such as doors, curtain, automobiles, bike, piano, scissors, electrical equipment, repair tools, umbrella, antique tape recorder, repair toy, pliers and so on.

0.091 wire diameter

3.2 maximum deflection

29 maximum safe load

DIY Supplies: Metalworking

Load Type: Torsion

Surface: polishing, anodizing

Material: Spring Steel

The deformation angle is proportional to the torque, and has high torque.

It is used for the mechanism that works for a long time with the torque of multiple angles.

It is not easy to fatigue

Sufficient Quantity: Our package comes with 10 pieces of 1-inch extension springs, providing ample supply for your daily needs and replacements.

Quality and Durability: Crafted with high-quality stainless steel, our extension springs are not only strong and sturdy but also boast excellent elasticity and flexibility, ensuring long-lasting usage.

Convenient Design: The extension spring is designed with 2 openings, making it easy to use and fix, saving you time and effort.

Compression spring dimensions: 9/32 inch x 1/2 inch, 1/4 inch x 13/32 inch, 7/32 inch x 11/16 inch, 3/8 inch x 5/8 inch, 3/8 inch x 3/4 inch, 9/32 inch x 3/4 inch, 23/64 inch x 1-3/8 inch, 7/32 inch x 1-1/2 inch.

Tension spring dimensions: 13/64 inch x 13/16 inch, 7/32 inch x 1 inch, 1/4 inch x 7/8 inch, 5/16 inch x 1-1/8 inch, 5/16 inch x 1-1/4 inch, 5/16 inch x 1-3/4 inch.

Material: small coil made of #75 galvanized steel, very durable

Comes with 10 Pack long spring for a variety of household applications use

20" extension spring; 0.35" diameter

Made of Nickel plated steel material for durability

Material: Our Long screen door spring are made of zinc plated steel, it is of good quality, good durability

Our extension springs can used in automotive, instrument, electrical equipment, household appliances, furniture, mechanical equipment, electronic sports equipment.

Our long screen door springs are important tool in our daily life.

0.072 wire diameter

1.48 maximum deflection

21.1 maximum safe load

[1]:APPLY TO - Can be used in home furniture such as door, sofa, chair, lounge chair, recliner, etc. Suitable for repairing accessories for home, construction machinery, electrical equipment, mechanical device and more.

[2]:SPECIFICATION - Wire Dia.: 0.5mm/0.02"; Spring Size(Outer Dia.): 5mm/0.2"; Free Length: 25mm/0.98"

[3]:DESIGN - The extension spring is designed with a dual hook, the hook at both ends of the spring, more convenient and practical to fasten, and can be easily disassembled without other tools.

[1]:APPLY TO - Can be used in home furniture such as door, sofa, chair, lounge chair, recliner, etc. Suitable for repairing accessories for home, construction machinery, electrical equipment, mechanical device and more.

[2]:SPECIFICATION - Wire Dia.: 1.5mm/0.06"; Spring Size(Outer Dia.): 12mm/0.48"; Free Length: 100mm/3.94"

[3]:DESIGN - The extension spring is designed with a dual hook, the hook at both ends of the spring, more convenient and practical to fasten, and can be easily disassembled without other tools.