SSC 7' Garage Door Extension Spring – 310 lb – 25-42 Series – White – Clips Included

🇺🇸 Made in USA

This SSC garage door extension spring is designed for compatible sectional garage doors approximately 7 feet highrequiring a 310 lb spring rating.

Manufactured by Service Spring Corporation (SSC), this heavy-duty extension spring belongs to the 25-42 Series and is supplied with clips for compatible extension-spring installations.

The spring uses the White identification color corresponding to the 310 lb rating and is rated for an industry-standard minimum lifecycle of 10,000 operating cycles.

Specifications

25-42 Series for 7' High Doors

This spring is part of SSC's 25-42 Series, intended for compatible 7-foot-high sectional garage doors.

The 25-42 designation identifies the spring series and should not be treated as a simple physical dimension.

Correct spring selection should be based on the complete specification, including:

• Door height

• Spring series

• Required pull rating

• Attachment configuration

• Existing counterbalance setup

• Actual door weight

310 lb Pull Rating

This spring provides a 310 lb pull rating and is intended for heavier sectional garage door applications requiring this specific counterbalance capacity.

A 310 lb extension spring should only be used when the door's spring system specifically calls for this rating.

An incorrectly rated spring can cause:

• Excessively heavy manual operation

• A door that rises unexpectedly

• Poor door balance

• Uneven cable tension

• Excessive opener strain

• Premature cable, pulley, and hardware wear

Always verify the required spring rating before installation.

White Color Code

The White identification color corresponds to the 310 lb extension-spring rating in this configuration.

Extension-spring color codes repeat at different weight ranges, so White alone does not identify the correct spring.

Before ordering, confirm:

• 7' door application

• 25-42 Series

• 310 lb pull rating

• White identification

• Clip-style attachment

Clips Included

This version is supplied with clips for compatible extension-spring installation.

The clip configuration provides the attachment points required for this spring design and differs from SSC springs using:

• Double-loop ends

• Open-loop ends

• Other attachment configurations

Compare your existing spring and attachment hardware before ordering.

Heavy-Duty Extension Spring Application

A 310 lb extension spring is designed for substantially heavier applications than typical light-duty residential extension springs.

Correct application depends on the actual door weight and counterbalance system.

Do not substitute this spring for a lighter-rated spring simply because the springs appear physically similar.

How Extension Springs Work

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

As the door closes, the springs stretch and store mechanical energy. When the door opens, that stored energy helps lift and counterbalance the weight of the door.

A properly matched extension-spring system helps provide:

• Smooth door travel

• Proper counterbalance

• Reduced opener strain

• Correct cable tension

• Easier manual operation

Compatibility & Fitment

Extension springs are not universal.

This spring should be selected when your system specifically requires:

• 7' high garage door

• 25-42 Series

• 310 lb pull rating

• White color code

• Clip-equipped configuration

Also inspect the existing:

• Lift cables

• Pulleys

• Safety containment cables

• Spring attachment points

• Track hardware

• Rear track supports

• Fasteners

Replace worn or damaged components before returning the door to service.

Replace Extension Springs in Pairs

If the 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. If one spring fails or weakens, the opposite spring may already be fatigued.

Using one new spring alongside one worn spring can result in:

• Uneven lifting force

• Unequal cable tension

• Crooked door movement

• Poor 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 reduces the risk of it becoming a dangerous projectile.

Inspect existing safety cables whenever replacing extension springs.

Ready to Order?

If your existing system requires a 7' door, SSC 25-42 Series extension spring, 310 lb rating, White identification, and clip-style attachment, this 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

• 25-42 Series

• 310 lb pull rating

• White color code

• Clips required

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, clip, or attachment point while the spring is stretched.

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

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

SEO Title: SSC 310 lb 7' Extension Spring – 25-42 Series – White

Meta Description: SSC 310 lb extension spring for 7' garage doors. 25-42 Series, White color code, clips included, black coated, minimum 10,000 cycles, Made in USA.