Model # P728-C

Internet #205510970

null P728 28 in. Plug-End Extension Spring (0.177 in. No. 7 Wire)
0856022005093

P728 28 in. Plug-End Extension Spring (0.177 in. No. 7 Wire)

$20.21 /each

Frequently Bought Together

Product Overview

P728 28 in. Plug-End Extension Spring is a Holmes spring replacement for heavier one-piece garage doors as well as for toy haulers using lift springs. We recommend replacing all springs at the same time for balanced door lift and even wear. A c-hook is required for a single spring installation while a w-hook is required for a double spring installation - available separately.

  • 2 x P728-C springs support 90 lbs. to 150 lbs. garage doors
  • 4 x P728-C springs support 150 lbs. to 300 lbs. garage doors
  • Length over coils: 28 in.
  • Outside diameter: 1-5/16 in.
  • Wire gauge: (0.177) #7
  • Initial tension: 110-120
  • Maximum allowable stretch: 18.5 in.
  • Manufacturer warranty: 1-year

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Customer Questions & Answers

My garage door is old and there is only one spring on each side of the two car garage.

The one who installed the garage door opener said I need to change the spring because it is different in size, one is 28-1/2 inches and the other is 30-1/2 inches long. It is only one spring per side. I want to buy new springs but don't know what to buy. The contractor wants $75.00 for each spring (maybe that include the labor) and I think it is very expensive. Can you help me? I am an old widow and I don't have much money to have contractors charge me excessively for materials. My brother was the one who installed the springs. Can you please help me find the right spring? The door is for 2 car and is made of corrugated metal and wood frame.
Asked by: Carmen
P728 (7 gauge wire, 28'' long) is probably the most common. If the door is heavy (wooden = approx. 300#) you'll need two on each side. Corrugated metal may be lighter so one per side may work. They are approx. $25 per spring and installing them is easy. Search online for how-to videos and weight guides.
Answered by: Slick
Date published: 2016-12-21

Does this spring have a rod in the middle of it?

Does this spring have a rod running through the middle of it? For a safety precaution...
Asked by: HDgirl
Yes, there is a wire to protect when the spring breaks.
Answered by: Springmaster
Date published: 2017-03-07

Are these springs still Made In The U.S.A. as of March 2017? Thanks

Are these springs still Made In The U.S.A. as of March 2017? Thanks
Asked by: jonwes
It is currently not listed where this product is made.
Answered by: CommunityAnswer
Date published: 2017-03-17

is the p528 150lb spring

Asked by: ferg
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Customer Reviews

P728 28 in. Plug-End Extension Spring (0.177 in. No. 7 Wire) is rated 4.9 out of 5 by 10.
Rated 5 out of 5 by from Garage door extention spring This replacement spring was easy to install. I read instruction on replacing the springs and it almost made me decide to call a specialist. I couldn't believe the specialist wanted $85.for 1 spring $200. to install it. Took 5 minutes to replace it. Glad I did it myself.
Date published: 2017-03-07
Rated 5 out of 5 by from Garage door spring replacement Installed relatively easily considering it was a "helper spring" for opening the garage door. The one that broke was also this brand--it was purchased about 25 years ago. They work, last a long time, and have a safety rod in the spring.
Date published: 2016-10-05
Rated 5 out of 5 by from Works fine but they did not have the necessary c hook any more (they always came with them before... Works fine but they did not have the necessary c hook any more (they always came with them before). So you will need to use the old one, find a new one or improvise.
Date published: 2016-12-27
Rated 5 out of 5 by from My son was able to install 4 of the extension springs with a minimal effort which made him happy. My son was able to install 4 of the extension springs with a minimal effort which made him happy.
Date published: 2017-01-18
Rated 4 out of 5 by from Disappointed that it is no longer sold in the stores. When it breaks you want it now! Disappointed that it is no longer sold in the stores. When it breaks you want it now!
Date published: 2016-12-20
Rated 5 out of 5 by from garage opens with ease. great now that with all new springs it is balanced. garage opens with ease. great now that with all new springs it is balanced.
Date published: 2017-01-08
Rated 5 out of 5 by from The new springs are perfect and work just fine.... The new springs are perfect and work just fine.
Date published: 2017-03-14
Rated 5 out of 5 by from The spring does it's job.... The spring does it's job.
Date published: 2017-03-16
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