SSC 8' Garage Door Extension Spring – 360 lb – 27" x 48" – Brown – Clips Included

🇺🇸 Made in USA

This SSC garage door extension spring is designed for sectional overhead doors approximately 8 feet high requiring a 360 lb rated extension spring.

Manufactured by Service Spring Corporation (SSC), this spring is part of the 27-48 series, measuring approximately 27" in its relaxed position and designed for approximately 48" of working stretch.

The spring uses the Brown identification color and includes the required spring clips for compatible extension-spring installations.

Specifications

Designed for 8' High Garage Doors

The 27-48 extension spring series is designed for compatible sectional garage doors approximately 8 feet high.

The spring is approximately 27" long when relaxed and stretches as the door closes, providing the counterbalance force required to help lift and support the door.

Always verify the existing spring dimensions and rating before ordering.

360 lb Spring Rating

This spring carries a 360 lb rating and should only be used when the door's extension-spring system requires this specification.

Do not substitute a lighter or heavier extension spring based only on physical size.

Incorrectly rated springs can cause:

• A door that is difficult to close

• A door that feels excessively heavy

• Uneven lifting

• Excessive opener strain

• Poor cable tension

• Unsafe door movement

Correct spring selection is essential for proper counterbalance.

Brown Color Code

The Brown color marking identifies this 360 lb extension spring within this spring series.

Color coding provides a convenient identification reference, but it should not be the only specification used when selecting a replacement.

Before ordering, verify:

• Spring rating

• Door height

• Relaxed spring length

• Working stretch

• End/clip configuration

• Existing spring specifications

Clips Included

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

That distinguishes it from standard double-loop versions that may require separate attachment hardware.

When replacing an existing spring, compare the attachment arrangement with your current hardware before installation.

How Extension Springs Work

Extension springs are typically mounted along the horizontal tracks on both sides of the garage door.

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

A correctly balanced extension-spring system helps provide:

• Smooth door movement

• Reduced load on the garage door opener

• Proper cable tension

• Easier manual operation

• More even door travel

Compatibility & Fitment

Extension springs are not universal.

This spring should be selected when the system specifically requires:

• 8' door application

• 27-48 spring configuration

• 360 lb rating

• Brown identification

• Clip-style attachment

Also inspect the existing:

• Lift cables

• Pulleys

• Safety cables

• Track hardware

• Spring attachment points

• Rear track supports

Worn hardware should be replaced before the door is returned 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, the opposite spring may already be significantly fatigued.

Using one new spring with one heavily worn spring can result in:

• Uneven door balance

• Unequal cable tension

• Crooked door movement

• Increased hardware wear

• Reduced spring life

Safety Cables Strongly Recommended

Extension springs should be used with properly installed safety containment cables running through the center of each spring.

If an extension spring breaks, the safety cable helps prevent the spring from becoming a dangerous projectile.

Always inspect the safety cables whenever extension springs are replaced.

Ready to Order?

If your existing system requires an 8' door, 27-48 extension spring, 360 lb rating, Brown identification, and clip-style attachment, this SSC 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:

• 8' door height

• 27" relaxed length

• 48" rated stretch

• 360 lb spring rating

• Brown 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 completely release spring tension before servicing the system.

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

SEO Title: SSC 360 lb 8' Garage Door Extension Spring – 27 x 48 Brown

Meta Description: SSC 360 lb garage door extension spring for 8' doors. 27" x 48" configuration, Brown color code, clips included, 10,000-cycle minimum, Made in USA.