The 28 in. Plug-End Extension Spring Pair – 0.207 in. No. 5 Wire is a reliable replacement spring set for residential garage door systems that use plug-end extension springs. Built for strength and balanced lifting support, this pair helps restore smoother door movement when old springs become worn, stretched, or damaged.

Each spring is manufactured with 0.207 in. No. 5 wire and has a 1-5/8 in. outside diameter. When installed as a pair, these P528 springs are designed to support garage doors weighing approximately 105 lbs to 175 lbs. For heavier doors, the source product notes that 4 P528 springs can support 200 lbs to 350 lbs.

Replacing extension springs in matching pairs is recommended to keep the garage door properly balanced and to reduce uneven wear on the opener, tracks, rollers, and other garage door hardware.

Product Features

• Size: 28 in. length over coils
• Wire Size: 0.207 in. No. 5 wire
• Outside Diameter: 1-5/8 in.
• Spring Type: Plug-end garage door extension spring
• Quantity: Pair of 2 springs
• Door Weight Support: Approximately 105–175 lbs when using 2 springs
• Heavier Door Support: 200–350 lbs when using 4 springs
• Initial Tension: 135–145 lbs
• Maximum Allowable Stretch: 22 in.
• Product Code: P528

Best For

This extension spring pair is ideal for residential garage doors that match the required spring length, wire size, outside diameter, stretch, and door weight specifications. It is commonly used for replacing damaged or weakened extension springs and restoring proper garage door balance.

Installation Note

Garage door extension springs are under high tension and can be dangerous if installed incorrectly. Always confirm your current spring measurements and door weight before ordering. Professional installation is recommended for safety and proper performance.