Century Spring C-339 10" Extension Springs with 1-1/4" Outside Diameter
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Century Spring C-339 10" Extension Springs with 1-1/4" Outside Diameter

4.2/5
Product ID: 61159320
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📏10" length precision
⚖️73.7 lbs max safe load
🛠️0.148" durable wire gauge

Description

⚙️ Spring into strength with Century’s precision power!

  • HIGH LOAD CAPACITY - Supports up to 73.7 lbs safely, perfect for demanding applications
  • OPTIMAL WIRE GAUGE - 0.148-inch wire diameter balances strength and flexibility
  • COMPACT YET POWERFUL - 1.25" outside diameter fits tight spaces without compromising performance
  • ROBUST STEEL CONSTRUCTION - Crafted from high-grade steel ensuring long-lasting durability
  • PRECISION ENGINEERED LENGTH - Exact 10-inch extension for reliable fit and function

The Century Spring C-339 is a 10-inch steel extension spring featuring a 0.148-inch wire diameter and a 1.25-inch outside diameter. Engineered to handle a maximum safe load of 73.7 lbs with a deflection capacity of 6.18 inches, it delivers reliable performance for home improvement and industrial needs.

Specifications

ManufacturerJensen (Home Improvement)
Part NumberC-339
Item Weight0.811 ounces
Product Dimensions1.25 x 1.25 x 10.25 inches
Item model numberC-339
MaterialSteel
Item Package Quantity1
Measurement Systeminch
Batteries Included?No
Batteries Required?No

Have a Question? See What Others Asked

Are both termination points full loops? Thank you.
how far does this stretch?
Is it one spring or a set?
What is the inside dimensions?

Reviews

4.2

All from verified purchases

R**.

It was correct part and came in on time

It was correct part and came in on time

L**S

Attic Stair Repair Hero

This is exactly what I needed to replace a old stretched out spring on my attic pull down stairs. I have a home with a Century attic ladder and it is nothing fancy but for years one of the sides has been constantly sagging and gradually getting worse. It didn't take me long to realize that the culprit was a spring that had caught on a bolt while the door was closed and then when opened it caused the spring to get deformed and stretched out...Well long story short, I have been looing forever to find a replacement spring and could never quite find exactly what I needed but when I stumbled across this one on Amazon it looked like it should fit the bill and it was cheap enough that it was worth it to take a chance. Well the gamble paid off and while it is a tiny bit shorter than the original spring it works perfectly. I couldn't recommend this more if you have a century attic stair like this...Century 8.9 ft. Spacemaker Wooden Attic Stair and need a replacement spring, then this is exactly what you need.***Update***I forgot to mention this before but I did have to cut a tiny bit off of one of the eyes of the spring in order for me to be able to get it to hook through the original spring mount. Also to be honest it was a huge pain in the rear to install. Since it is a tiny bit shorter than the original spring, that requires stretching it slightly to actually get it installed, which was definitely no picnic. However since this spring wasn't necessarily designed for this specific application I wasn't going to ding it on the review for those two issues. Especially since now that it is installed it works perfectly.

T**A

Fold up attic stairs

If they were just a little bit stronger they would be perfect. As they are, they work fine. They just don't pull the stars up tight, maybe 1/8" gap when closed.

B**R

attic loft door spring

needed spring for attic loft door. bought one to see if correct part, as i could not find any part number for door....tried an it fit perfect! what the heck, bought a second one to match the first, and now i have a perfectly working attic pull down door that will last me for the next couple of decades!!!! thank you!

V**E

Fantastic Customer Service From Cody

Cody was very helpful in assisting me with purchasing the right spring for my attic pull dow ladder.

M**E

Worked

Springs worked well on the attic door. Easy to install.

W**C

Good product. A lot stiffer than Century Springs but ...

Good product. A lot stiffer than Century Springs but still useable for wheelchair ramps on the back of our vans we build.

T**T

Shuts the screen door

Good recoil. Looks nice also.

Common Questions

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Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

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