Easy
15-30 minutes
This is an authentic OEM sourced replacement part designed for use with Senco staplers. This o-ring provides an air-tight seal for valve assembly. Over time this o-ring will shrink, become brittle and crack allowing for air leaks. At that time it should be replaced. It is made out of rubber and it is sold individually.
Replacing this item you would need hex key/allen wrench and pliers to replace this item.
Seal LB5012
OEM part for: Senco
Part Number: LB5012
$4.99
In Stock
Ships within 1 business day 
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Product Description ?
- Classification: Part
- Weight: 0.01 lbs.
- Shipping: Ships Worldwide
Frequently Purchased Together ?
Compatibility
This part will fit the following 15 machines
Senco
K (KG4450-1) K Stapler View Diagrams & Manuals
K (KG4450-1 1/4) K Stapler View Diagrams & Manuals
K (KG4450-1 1/2) K Stapler View Diagrams & Manuals
L (LG45-3/4) Stapler View Diagrams & Manuals
L (LN3045-1) Stapler View Diagrams & Manuals
L (LN4450-1) Stapler View Diagrams & Manuals
L (LG4450-1) Stapler View Diagrams & Manuals
L (LN2532-3/4) Stapler View Diagrams & Manuals
LS1 18 Ga. Headless Pinner View Diagrams & Manuals
LN4450-1 Air Nailer View Diagrams & Manuals
LS Stapler View Diagrams & Manuals
LS118Ga (200001N) Ls1 Headless Pinner View Diagrams & Manuals
LS2 Stapler View Diagrams & Manuals
LS4 Stapler View Diagrams & Manuals
LS5 Stapler View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Stapler Parts
Customer Part Reviews ?
Average Rating (out of 5):
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Worked great
The part was relatively easy to locate, was correct, and dropped right into place.
Guest -
July 7, 2022
Verified Purchase
Perfect part for the job.
I needed a seal that was not available from the manufacturer anymore. You had the part and sent it promptly. Thank you!
Guest -
February 28, 2022
Verified Purchase
part Worked well
What is the right part I ordered part was easy to install stapler worked well
Guest -
November 11, 2019
Verified Purchase
Great Item
Great item that fit perfectly and came quickly
Guest -
September 4, 2019
Verified Purchase
The top seal fit perfectly my nail gun. I have no idea where the other O-ring fits into the gun sense I do not have a schematic. Senco LS-two.
Replacement parts for my Senco nail gun LS-2, only the top sealed fit having no schematic. I do not know where the two other parts ordered fit.
Guest -
February 28, 2023
Verified Purchase
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t days ago
Verified Purchase
eReplacementParts Team
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Questions & Answers ?
Our customer Service team is at the ready daily to answer your part and product questions.
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We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
Does this fit my product?Questions & Answers for Seal
Which way does the lip on the firing valve go at the top or bottom
James
for model number senco air stapler L 87801063
asked on 2022-02-28
Hello James, thank you for your question. We have a video on how to replace the seal that should answer your questions. https://youtu.be/thoMnLUaGlo We hope this helps.
eReplacementParts Team February 28, 2022
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.
Leaking air from upper vent
Gary - April 17, 2017
👍 5 of 6 people found this instruction helpful
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Allen wrenches
Parts Used
1. Remove four Allen bolts.
2. Remove upper portion of gun.
3. Replace seals.
4. Reinstall.
2. Remove upper portion of gun.
3. Replace seals.
4. Reinstall.
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Air started leaking from top of Senco Pin Gun
Michael - September 16, 2017
👍 3 of 3 people found this instruction helpful
Tool Type
Nailer
Difficulty
Medium
Time
15-30 minutes
Tools Used
Wrench Set
Parts Used
Using a hex wrench I removed the top air flow vent and the top cover allowing me to access the interior of the pin gun. I could see that the inner seal was broken. I looked at the diagram from ereplacement.com and determined what part it was I needed.
Just to be sure.... I called their support service and talked with a rep who confirmed the part that I should order. I also purchased an spare and an o ring that may need to be replaced in the future. They mailed the parts to me... about a week. I did a through cleaning of all parts as I reassembled to be sure of no small broken fragments that may affect my repair. Slid the seal back onto the retainer... no need to remove any other parts.
Everything went well and I now am back in business.
It was nice to have the support number to call to confirm parts!
Just to be sure.... I called their support service and talked with a rep who confirmed the part that I should order. I also purchased an spare and an o ring that may need to be replaced in the future. They mailed the parts to me... about a week. I did a through cleaning of all parts as I reassembled to be sure of no small broken fragments that may affect my repair. Slid the seal back onto the retainer... no need to remove any other parts.
Everything went well and I now am back in business.
It was nice to have the support number to call to confirm parts!
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30 year old pin nailer air leak and would not shoot nails
Ron - August 8, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Stapler
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Allen wrench
Parts Used
Remove the top of the nailer, noticed the air seal was in many pieces. Ordered parts and replaced seal, put all parts back together (no parts left over) and game on, started using nailer right away. Great service from eReplacements.
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Nylon gasket failed
Kirk - March 27, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Stapler
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Allen wrench
Parts Used
Removed for allen screws from the top cover and removed it
Remove the damaged seal and installed the new one
Cleaned the entire stapler and oiled it
Replace the top cover
Remove the damaged seal and installed the new one
Cleaned the entire stapler and oiled it
Replace the top cover
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Leaked air on top
Radhakrishna - March 22, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Stapler
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Allen wrench
Parts Used
1. Removed the top 4 Allen screws.
2. Slid out the piston.
3. Cut out the old torn seal.
4. Put the new seal over the piston shoulder.
5. Put it back into the cylinder.
6. Replaced the cover and the Allen screws. Done!
2. Slid out the piston.
3. Cut out the old torn seal.
4. Put the new seal over the piston shoulder.
5. Put it back into the cylinder.
6. Replaced the cover and the Allen screws. Done!
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Air leaking from top
J.pilar - February 11, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Stapler
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Allen wrench set
Parts Used
Remove the top cap of the staple, removed the worn seal and replaced it with the new one, quick and easy.
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Senco Pin Nailer seal wore out.
Steve - November 12, 2016
👍 1 of 1 people found this instruction helpful
Tool Type
Stapler
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Allen Wrenches
Parts Used
1- Removed top of gun and exchanged seal.
2- Put top of gun back on and tightened allen screws- Done
2- Put top of gun back on and tightened allen screws- Done
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Leaking air from top of pin nailer. No pressure to operate.
Eric - November 2, 2016
👍 1 of 1 people found this instruction helpful
Tool Type
Stapler
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Allen wrench
Parts Used
Remove the cylinder cap assembly.
Remove the broken seal.
Install the new seal.
Clean the entire inside of the cylinder, and oil it.
Replace the cylinder cap assembly.
Remove the broken seal.
Install the new seal.
Clean the entire inside of the cylinder, and oil it.
Replace the cylinder cap assembly.
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Just had to replace a broken part
Dale - April 30, 2016
👍 1 of 1 people found this instruction helpful
Tool Type
Nailer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Wrench Set
I decided to clean out and replace the seals in the gun. Cleaned all the internal moving parts , replaced all the o-rings and the valve assembly, put it all back together and It works fine now.
Lay out all the new parts and as you remove the one old one replace it with the new one.
Lay out all the new parts and as you remove the one old one replace it with the new one.
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Stapler wouldn't shoot staples. the driver wouldn't cycle.
craig - April 19, 2016
👍 1 of 1 people found this instruction helpful
Tool Type
Stapler
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, allen wrench
Parts Used
Wasn't positive that I ordered the right part but it ended up being correct. I removed the top of the stapler. Looked in it and found the defective seal. I removed it and installed the new one, then cleaned and oiled the inside of the gun. I then replaced the top of the stapler. The stapler is working as it should now.
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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.
