SSC 7' Garage Door Extension Spring – 340 lb – 25" x 42" – Blue – Clips Included

SSC 7' Garage Door Extension Spring – 340 lb – 25" x 42" – Blue – Clips Included

🇺🇸 Made in USA

This SSC garage door extension spring is designed for 7-foot-high sectional garage doors requiring a 340 lb pull rating.

The spring is part of the 25-42 series, measuring approximately 25" in its relaxed position and designed for approximately 42" of extension during normal door travel. It features a durable black protective coating, Blue identification color, and includes clips for installation.

Manufactured in the USA by Service Spring Corporation (SSC), this spring is rated for an industry-standard minimum lifecycle of 10,000 cycles.

Specifications

Designed for 7' High Garage Doors

The 25-42 extension spring series is designed for compatible 7-foot-high sectional garage doors.

The first number represents the approximate relaxed spring length, while the second represents the spring's rated extension:

• 25" approximate relaxed length

• 42" approximate extension

• 340 lb pull rating

Correct spring sizing is critical for safe and balanced garage door operation.

340 lb Pull Rating

This spring is rated for a 340 lb application.

Extension springs must be selected according to the weight and configuration of the garage door. Installing a spring with too little or too much lifting force can cause poor door balance, excessive opener strain, uneven movement, or unsafe operation.

Do not choose an extension spring based only on its physical size.

Blue Color Code

The Blue color marking identifies the 340 lb rating in the 25-42 extension spring series.

Because extension spring color codes repeat at different weight ranges, always verify:

• Door height

• Spring series

• Pull rating

• Relaxed length

• Stretch specification

Do not order based on color alone.

Clips Included

This spring is supplied with installation clips included, making it suitable for compatible extension-spring hardware systems that use this attachment configuration.

Always compare the existing spring ends, clips, pulleys, cables, and mounting hardware before ordering.

How Extension Springs Work

Extension springs are installed alongside the horizontal tracks of compatible sectional garage doors.

When the garage door closes, the springs stretch and store mechanical energy. As the door opens, that stored energy assists in lifting and counterbalancing the weight of the door.

A properly matched extension spring system helps:

• Balance the garage door

• Reduce strain on the opener

• Support smooth door movement

• Reduce excessive load on cables and pulleys

• Maintain controlled opening and closing

Compatibility & Fitment

Designed for compatible:

• 7' high sectional garage doors

• 25-42 extension spring systems

• Doors requiring a 340 lb spring rating

• Standard extension-spring pulley systems

• Compatible clip-style extension spring hardware

This spring is not intended for torsion spring systems.

Before ordering, verify the existing spring's:

• Door height

• Pull rating

• Spring length

• Extension specification

• Color code

• End / clip configuration

Replace Extension Springs in Pairs

When a garage door uses two extension springs, replacing both springs at the same time is strongly recommended.

Springs installed together experience similar numbers of operating cycles. If one spring has failed from fatigue, the opposite spring may also be near the end of its service life.

A new spring paired with a heavily worn spring can also create uneven lifting force and poor door balance.

Safety Cables Recommended

Extension springs can contain significant stored energy when stretched.

A properly installed extension spring safety cable should run through each spring where required by the door system. The safety cable helps contain the spring if it breaks during operation.

Never operate an extension-spring door with missing, damaged, or incorrectly installed required safety hardware.

Ready to Order?

If your existing spring matches a 7' high door, 25-42 series, 340 lb pull rating, and compatible clip configuration, this SSC replacement spring is ready for your repair.

Add this spring to your cart now and restore proper counterbalance to your garage door.

Before purchasing, double-check:

• 7' door height

• 25-42 spring series

• 340 lb pull rating

• Blue identification color

• Compatible clip-style attachment

If any of these specifications differ from your existing system, verify the correct spring before ordering.

Safety Warning

⚠️ Extension springs store substantial mechanical energy and can cause severe injury or property damage if improperly installed or handled.

Garage doors equipped with extension springs also use cables, pulleys, brackets, and other components that may be under tension.

Installation should be performed by a qualified person familiar with garage door extension spring systems and proper safety procedures.

Never remove or disconnect a stretched extension spring without first understanding how to safely release the spring tension.

SEO Title: SSC 7' Extension Spring 340 lb – 25 x 42 – Blue – Clips Included

Meta Description: SSC 25" x 42" extension spring for 7' garage doors. 340 lb pull rating, Blue color code, clips included, black coated, 10,000-cycle minimum, Made in USA.