SSC 7' Garage Door Extension Spring – 40 lb – 25" x 42" – Blue – Double Loop

🇺🇸 Made in USA

This SSC garage door extension spring is designed for sectional garage doors approximately 7 feet high requiring a 40 lb spring rating.

Manufactured by Service Spring Corporation (SSC), this spring is part of the 25-42 series, with approximately 25" relaxed length and 42" working stretch.

It features durable double-loop ends, a protective black-coated finish, and the Blue DASMA color code corresponding to this 40 lb spring rating.

Specifications

Designed for 7' High Garage Doors

The 25-42 extension spring series is intended for compatible sectional garage doors approximately 7 feet high.

The spring stretches as the garage door closes, storing mechanical energy that helps counterbalance the weight of the door during opening.

Correct spring sizing is essential for smooth and safe operation.

40 lb Pull Rating

This spring is rated for a 40 lb door application.

Do not select an extension spring based only on its physical appearance. Springs with similar dimensions may have very different pull ratings.

An incorrectly rated spring can cause:

• A door that feels too heavy

• A door that rises by itself

• Uneven lifting

• Improper cable tension

• Excessive opener strain

• Premature wear on pulleys and hardware

Always verify the required spring rating before ordering.

Blue DASMA Color Code

This 40 lb extension spring uses a Blue DASMA identification color.

The color mark helps identify the spring rating, but color alone should not be used to determine compatibility.

Before ordering, verify:

• Door height

• Door weight

• Spring rating

• Relaxed spring length

• Working stretch

• End configuration

Double-Loop Ends

This spring features double-loop ends for attachment to compatible extension-spring hardware.

Clips are not included with this version.

If your existing spring uses clipped ends or another attachment configuration, verify the correct replacement style before ordering.

How Extension Springs Work

Extension springs are normally installed along the horizontal tracks on both sides of a sectional garage door.

As the door closes, the springs extend and store energy. When the door opens, the stored energy helps lift and counterbalance the door.

A properly matched extension-spring system helps provide:

• Smooth door travel

• Proper counterbalance

• Reduced garage door opener load

• Consistent cable tension

• Easier manual operation

Compatibility & Fitment

Extension springs are not universal.

This spring should be selected when the garage door system requires:

• 7' high door application

• 25-42 spring configuration

• 40 lb pull rating

• Blue color code

• Double-loop ends

Also inspect the pulleys, lift cables, track hardware, attachment points, and safety cables whenever extension springs are replaced.

Replace Extension Springs in Pairs

If your garage door uses two extension springs, replacing both springs as a matching pair is generally recommended.

Both springs normally experience approximately the same number of operating cycles. When one spring breaks or becomes weak, the opposite spring may already be fatigued.

Using one new spring with one worn spring can cause:

• Uneven lifting force

• Unequal cable tension

• Crooked door travel

• Poor door balance

• Increased hardware wear

Safety Cables Strongly Recommended

Extension-spring systems should use properly installed safety containment cables running through each spring.

If an extension spring breaks, the safety cable helps contain the spring and prevents it from becoming a dangerous projectile.

Inspect the safety cables whenever replacing extension springs and replace damaged or missing cables before operating the door.

Ready to Order?

If your existing system requires a 7' door, 25-42 extension spring, 40 lb rating, Blue identification, and double-loop ends, this SSC replacement spring is ready for your repair.

Add it to your cart today and restore proper garage door counterbalance with the correct SSC-made extension spring.

Before ordering, double-check:

• 7' door height

• 25" relaxed length

• 42" rated stretch

• 40 lb pull rating

• Blue color code

• Double-loop ends

Safety Warning

⚠️ Garage door extension springs operate under substantial tension and can cause severe injury, death, or property damage if improperly handled.

Never remove an extension spring, pulley, lift cable, or attachment point while the spring is stretched.

Secure the garage door and fully release spring tension before servicing the system.

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