This authentic OEM sourced replacement part is designed for use with Bostitch nailers. It provides spring action for the magazine. It is made out of metal with a plastic hub and it is sold individually. To complete this repair you would need a screwdriver.
Constant Force Spring 115143
OEM part for: Bostitch
Part Number: 115143
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![Bostitch Bostitch](images/29443_white.png)
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Compatibility
This Constant Force Spring will fit the following 25 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Bostitch
Show More Compatible ModelsThis item works with the following types of products:
- Nailer Parts
Repair Videos ?
Customer Part Reviews ?
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Does this fit my product?Questions & Answers for Constant Force Spring
Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Constant Force Spring that keeps pressure on the nails was broken
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set, Alex Wrench Set
Parts Used
In order to replace the Constant Force Spring, I had to remove the nailer magazine from the nailer body. This task was not difficult. I used a socket wrench and an alex wrench to remove the screws. Once the magazine was out, I made a mistake removing the part in back of the magazine that holds the spring while you load the nails. That was not necessary because the Force Spring and housing comes out of the front of the magazine. It was very easy to replace it with the new spring.
Constant force spring broke which keeps nails pushed to front of nail gun.
Tool Type
Nailer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Nutdriver, Allen wrench
Parts Used
2. Removed handle pusher which housed the spring.
3. Slid other end of broken spring off front end of magazine.
4. Put new spring into handle pusher keeping it all the way at front of magazine.
5. Slide rivet on end of spring into slot at front of magazine, then pull handle pusher all the way to end of magazine
6. Put magazine back on gun, loaded up nails and fired away.
Constant Spring became unattached
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Wrench Set
Removed the defective spring and installed the new spring, making sure it was caught in the retaining latch .
Replaced the nail tray assembly.
Tested the tool.
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Our product descriptions are a combination of data sourced directly from the manufacturers who made your product as well as content researched and curated by our content & customer service teams. This content is edited and reviewed internally before being made public to customers.
Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.