How many lbs of compression does this spring yield? I’m looking for 50 lbs compression to use on a cheese press.

I do not know the exact amount of pressure required to compress the spring but I do know that it isn’t 50 pounds. I would estimate it as closer to 2-3 pounds. I used mine on a washing machine start button that is plastic—so it is a very light spring.

I want to make costume antennae. Will these work? I want them to bounce about supporting styrofoam balls at the end to wiggle.

This would work fine for that. not too stiff... In my opinion

What is the spring constant?

Quoting the max safe work load doesn't answer the question and is not helpful to you customers. I have the same question: What is the spring constant? So, in the interest of trying to be helpful I'll offer this: Spring force is measure by a formula F=kX where K is the spring constant. The force pressure of the spring is equal to it's constant times the amount you compress it. If the constant K is 1lb/inch compressing it 3" will cause it to resist the compression with 3lbs of force. This formula is basic engineering 101, is useful for a specified amount of compression or extension (yes, you can overdo it), and useful for both compression and extraction springs. So knowing this you can easily determine the K value for your customers. I am looking for a spring roughly 4" long, 1/2" inside diameter and a spring constant of 8oz/inch.

I'm looking for springs to hang lightweight bouncing toys. Would something like this work?

The spring can support a maximum safe load of 4.82lbs.

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Prime-Line SP 9711 Compression Spring, Spring Steel Construction, Nickel-Plated Finish, 0.041 GA x 23/32 In. x 3-1/2 In. (2 Pack)

Prime-Line SP 9711 Compression Spring, Spring Steel Construction, Nickel-Plated Finish, 0.041 GA x 23/32 In. x 3-1/2 In. (2 Pack)

Product ID: 392972336

📏3.5 in. length - versatile fit

⚖️4.82 lbs max load - reliable strength

🛠️0.041 in. wire diameter - precision gauge

KSh3665

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Description

⚙️ Upgrade your toolkit with springs that work as hard as you do!

COMPACT YET POWERFUL - 0.041 gauge wire and 3.5-inch length pack maximum strength in a sleek design.
ENGINEERED FOR VERSATILITY - Perfect for appliances, automotive, marine, and more—your go-to fix-it spring.
CORROSION RESISTANT NICKEL FINISH - Shiny, durable, and built to withstand indoor and outdoor environments.
PRECISION SPRING STEEL CONSTRUCTION - Tempered steel ensures optimal compression and long-lasting performance.
STRONG SPRING RATE WITH FLAT END COILS - Delivers consistent force and stability for professional-grade results.

The Prime-Line SP 9711 Compression Spring is a durable, nickel-plated spring steel component designed for a wide range of household and professional applications. Measuring 3.5 inches in length with a 0.041-inch wire diameter, it supports up to 4.82 lbs of load with reliable compression performance. Its corrosion-resistant finish and flat end coil design ensure longevity and consistent strength, making it an essential upgrade for any repair or mechanical project.

Specifications

Asin	B008RG54YG
Best Sellers Rank	#18 in Garage Door Springs & Wires
Date First Available	20 June 2013
Department	Unisex-Adult
Is Discontinued By Manufacturer	No
Item Model Number	SP 9711
Manufacturer	Prime-Line Products
Product Dimensions	1.8 x 8.89 x 17.15 cm; 18 g

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KSh3665

Duties & taxes included

In stock

Sold byAmazon KenyaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Kenya.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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